CN115603302A - Standby state power supply method - Google Patents
Standby state power supply method Download PDFInfo
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- CN115603302A CN115603302A CN202110770904.2A CN202110770904A CN115603302A CN 115603302 A CN115603302 A CN 115603302A CN 202110770904 A CN202110770904 A CN 202110770904A CN 115603302 A CN115603302 A CN 115603302A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A cable with a non-circular ground wire body comprises two conducting wires, a ground wire body and an insulating wrapping tape. The inner sides of the wires are in contact with each other. The ground wire bodies are respectively arranged on two opposite sides of the lead, each ground wire body at least comprises a first side edge, a second side edge and a third side edge, the first side edge and the second side edge of each ground wire body respectively contact the outer surface of the lead, and the shape of the first side edge and the shape of the second side edge of each ground wire body respectively correspond to the shape of the outer surface of the lead. And the insulating wrapping tape is wrapped on the outer surface of the lead and the third side edge of the ground wire body. Therefore, the high-frequency signal transmission of the cable has small impedance variation, and the mechanical properties such as transmission stability, structural flexibility, bending property and the like can be obviously improved.
Description
Technical Field
The invention relates to a standby state power supply method, in particular to a power supply method for providing power supply conversion, and in addition, a primary side digital controller can be used for selecting a no-load mode, a sleep mode or a power-off mode as a standby mode in the standby state and controlling the power supply of the standby mode, so that the energy consumption in the standby state is effectively reduced, and the overall power saving effect is greatly improved.
Background
Since different electronic devices require specific power sources to provide required power, a high-quality and high-efficiency power conversion device is required as a power supply to meet the requirements of required power sources, such as an Integrated Circuit (IC) requiring a low-voltage dc of 1.2V, an electric motor requiring a dc of 12V, and a backlight module requiring a high-voltage power source of several hundreds of volts or more. In the current Power supplies, a Switching Power Supply (Switching Power Supply) with Pulse Width Modulation (PWM) characteristic is the most commonly used method because the Power Supply has a smaller volume and higher conversion efficiency than a linear Power Supply under the same output Power.
Taking a Flyback power converter as an example, a switching power supply needs to be configured with a power controller to generate a high-speed PWM driving signal, and a transformer including a primary side winding and a secondary side winding, a switching unit, a current sensing resistor, an output rectifier, and an output capacitor are collocated, where the primary side winding, the switching unit, and the current sensing resistor of the transformer are connected in series to form a primary side loop, and the secondary side winding, the output rectifier, and the output capacitor of the transformer are connected in series to form a secondary side loop, and the PWM driving signal drives the switching unit connected to the primary side winding, such as a power transistor, to rapidly turn on and off the switching unit in a periodic manner to turn on and off the switching unit, so that the secondary side winding of the transformer induces the current of the primary side winding to generate a secondary side current, and generates a stable output power after rectification and filtering of the output rectifier and the output capacitor, so as to supply a load for operation.
In addition, the output rectifier of the secondary side loop can be singly matched with an output capacitor by using a rectifier diode, and also can be matched with the output capacitor by using a secondary side switching unit and a secondary side controller to realize a rectification function, wherein the secondary side controller can further realize a synchronous rectification function.
With the increasing attention of environmental protection, and the international tide of energy and carbon saving, the industry is continuously striving to reduce the power waste of electrical and electronic devices, such as power consumption during standby, as much as possible, resulting in many test specifications and protocols. In particular, test specifications are becoming more stringent.
However, the above prior art has a disadvantage in that it cannot be directly used for a switching power supply such as a flyback or the like. Furthermore, the conventional method of saving power in no-load mode generally only enters a burst mode or a skip mode to achieve the purpose of reducing the PWM frequency, and then turns on a few PWM pulses to maintain the output within the default output voltage range, so as to meet the relevant specifications, but 90 to 264Vac of the input terminal will continue to supply power, which causes unnecessary loss and waste, so some test control ICs will disconnect the high-voltage input after power on, and completely cut off the power supply, but such measures require a very high-voltage advanced semiconductor process, which greatly increases the IC cost and weakens the competitiveness in the market.
Therefore, a standby power supply method with a novel design is needed, which is mainly implemented by a digital controller similar to the general digital controller, and when the application environment does not need to maintain the output voltage and is in the standby state, for example, when a mobile phone charger is plugged into a socket and is not connected with a mobile phone, the power supply method can directly enter a power-off mode without supplying power, or when the application environment needs to maintain the necessary output voltage in the standby state, the power supply method enters a sleep mode and only provides power supply capability enough to maintain the required output voltage, or when the application environment does not have the power supply requirement for the standby state, the power supply method enters an idle mode, power can be further saved, and particularly the power supply method can be awakened from the power-saving power-off mode, the sleep mode and the idle mode to return to the normal power supply mode, so that the overall power consumption can be effectively reduced, the power saving effect can be greatly improved, and the problems in the prior art can be solved.
Disclosure of Invention
The main objective of the present invention is to provide a standby power supply method, which includes steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74 and S76, to implement a power conversion function and a standby power supply function, and to greatly reduce the energy consumption in the standby state to improve the overall power saving effect.
Specifically, the standby power supply method of the present invention starts from step S10, when the power conversion system generates the operating power as the output power and outputs the operating power through the power output terminal, the load level borne by the power output terminal is continuously detected, and it should be noted that the power output terminal may be a connected load or not connected with any load.
Then, step S20 is performed to determine whether the load level is not greater than the default standby load, and whether the time that the load level is not greater than the standby load is maintained and reaches the preset standby time, wherein the standby load is between 1 and 5% of a full load (full loading), and the standby time is between 0.1 and 10 ms. If it is determined and determined in step S20 that the load level is not greater than the standby load and has been maintained for the standby time, the process proceeds to step S30 to enter the standby selection mode.
After step S30, when step S40 is executed, it is determined whether the power output terminal of the power conversion system is connected to the load or whether the connected load is disconnected from the power output terminal, and then it is determined whether the connected load has a standby power requirement, and then a no-load mode, a sleep mode or a power-down mode is selected as the standby mode. Specifically, if the power conversion system is not connected to a load, an idle mode is entered, whereas if the connected load has a standby power demand, a sleep mode is entered, and if the connected load does not have a standby power demand, a power-down mode is entered.
When it is determined in step S40 that the power output terminal is not connected to the load, the process proceeds to step S50 to execute a no-load mode (or deep sleep mode), and then proceeds to step S52, where the power conversion system is driven to generate no-load sustain power at the power output terminal, and then proceeds to step S54 of the no-load wake-up detection mode, where it is detected whether the load level of the power output terminal is not less than the no-load wake-up level, and if the load level is not less than the no-load wake-up level and is maintained and reaches the no-load wake-up time, the process proceeds to step S56 of the no-load recovery mode, where the power conversion system is driven to generate operation power, and returns to step S10.
For example, the idle hold power may be between 0.1 and 10% of the operating power, the idle wake-up level may be between 1 and 5% of full load, and the idle wake-up time may be between 1 and 10 seconds.
Further, when it is determined at step S40 that the load is connected to the power output terminal and the load has a standby power demand, the process proceeds to step S60 to execute a sleep mode (sleep mode). After step S60, step S62 is performed to drive the power conversion system to generate sleep maintenance power at the power output end to meet the standby power requirement, and step S64 is performed to execute the sleep wake-up detection mode to detect whether the load level at the power output end is not less than the sleep wake-up level. If the load level is not less than the sleep wake level and is maintained for the sleep wake time, step S66 is entered to execute a sleep recovery mode (sleep recovery mode), and the power conversion system is activated to generate operating power, and then step S10 is returned to.
For example, the sleep maintenance power is greater than or equal to the idle maintenance power, the idle wake-up level may be between 1 and 5% of full load, and the sleep wake-up time may be between 1 and 10 seconds.
Then, when it is determined in step S40 that the power output terminal is connected to the load and the load does not have the standby power requirement, the method proceeds to step S70 to execute a power down mode (power down mode), and after step S70, the method proceeds to step S72, the power conversion system is driven to generate no power at all to stop supplying power to the load through the power output terminal, and then the method proceeds to step S74 of a power down wakeup detection mode, whether the load level of the power output terminal is not less than the power down wakeup level is detected, and if the load level is not less than the power down wakeup level and is maintained for the power down wakeup time, the method proceeds to step S76 of a power down recovery mode (power down recovery mode), the power conversion system is driven to generate the operating power, and the method returns to step S10.
For example, the power-off wake-up level may be between 1 and 5% of full load, and the power-off wake-up time may be between 1 and 10 seconds.
More specifically, the power conversion system may be a Flyback power conversion system with synchronous rectification function, and includes a primary-side digital controller, a secondary-side synchronous controller, a rectification unit, a power unit, a transformer unit, a primary-side switching unit, a secondary-side output capacitor, and a current sensing unit, and particularly, the primary-side digital controller performs steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74, and S76, and includes a primary-side power pin, a primary-side ground pin, a primary-side driving pin, and a primary-side current sensing pin, wherein the primary-side ground pin is connected to a primary-side ground potential.
Alternatively, the power conversion system may be a flyback power conversion system without synchronous rectification function, and only includes the primary-side digital controller, the rectification unit, the power unit, the transformer unit, the primary-side switching unit, the secondary-side rectifying diode, and the current sensing unit, but does not include the secondary-side synchronous controller, the secondary-side switching unit, and the secondary-side switching unit is replaced by the secondary-side rectifying diode, and in particular, the steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74, and S76 are still performed by the primary-side digital controller, and include the primary-side power pin, the primary-side ground pin, the primary-side driving pin, and the primary-side current sensing pin, wherein the primary-side ground pin is connected to the primary-side ground.
For a flyback power conversion system with synchronous rectification function, a rectification unit receives and rectifies an external input power to generate a rectified power, a power unit receives the external input power and generates and outputs a power voltage after processing, wherein a power pin receives the power voltage to be used by a primary side digital controller for operation. The transformer unit comprises a primary side winding and a secondary side winding which are coupled with each other, one end of the primary side winding is connected with the rectifying unit and used for receiving a rectified power supply, the drain electrode of the primary side switching unit is connected with the other end of the primary side winding, and the gate electrode of the secondary side switching unit is connected with the primary side driving pin.
One end of the current sensing unit is connected to the primary side current sensing pin and the source of the primary side switching unit, and the other end of the current sensing unit is connected to the primary side ground potential, and a current sensing signal is generated by the current sensing pin and is further transmitted to the primary side digital controller through the current sensing pin. In addition, the drain of the secondary side switching unit is connected with one end of the secondary side winding, one end of the secondary side output capacitor and one end of the load are connected with the source of the secondary side switching unit, the gate of the secondary side switching unit is connected with the secondary side driving pin, wherein the other end of the secondary side winding, the other end of the secondary side output capacitor and the other end of the load are connected with the secondary side ground potential, and particularly, the source of the secondary side switching unit is used as a power output end to generate the output power to supply power to the load.
Furthermore, the primary side digital controller receives a current sensing signal from the current sensing unit through the current sensing pin, generates a primary side driving signal according to the current sensing signal, and further transmits the primary side driving signal to the gate of the primary side switching unit through the primary side driving pin, wherein the primary side driving signal is essentially a Pulse Width Modulation (PWM) signal, has a PWM frequency, and includes a periodic turn-on level and a turn-off level for periodically turning on or off the primary side switching unit and simultaneously changing the primary side current of the primary side winding.
In addition, the secondary side synchronous controller generates a secondary side driving signal according to the secondary side current or the drain-source cross voltage of the secondary side switching unit, and transmits the secondary side driving signal to the gate of the secondary side switching unit through the secondary side driving pin so as to control the on/off of the secondary side switching unit. In particular, the secondary side winding generates a secondary side current by utilizing the electromagnetic induction effect with the primary side winding, and the secondary side current flows through the secondary side switching unit and the secondary side output capacitor to reach a load under the control of the secondary side synchronous controller, and the secondary side output capacitor and the load are connected in parallel and then connected in series to the secondary side switching unit.
For a flyback power conversion system without a synchronous rectification function, an electrical connection circuit of the primary side digital controller is the same as that of the primary side digital controller corresponding to the flyback power conversion system with the synchronous rectification function and is kept unchanged.
Further, the anode of the secondary side rectifier diode is connected with one end of the secondary side winding, one end of the secondary side output capacitor and one end of the load are connected with the cathode of the secondary side rectifier diode, the other end of the secondary side winding, the other end of the secondary side output capacitor and the other end of the load are connected with the secondary side ground potential, and the cathode of the secondary side rectifier diode generates an output power supply for supplying power to the load.
Therefore, the standby state power supply method of the invention can be used for a flyback power conversion system with a synchronous rectification function, can also be used for a flyback power conversion system without the synchronous rectification function, provides a power supply function for power conversion, and can effectively reduce the whole energy consumption when the power conversion system is in a standby state, thereby greatly improving the power saving effect.
Generally speaking, the invention judges whether to enter the standby state according to the load degree, selects the no-load mode, the sleep mode or the power-off mode as the standby mode, respectively drives the power conversion system to generate the no-load maintaining power, the sleep maintaining power or stop the power supply to the power output end, and further provides the no-load awakening detection mode, the sleep awakening detection mode and the power-off awakening detection mode to return to the normal power supply mode from the no-load mode, the sleep mode or the power-off mode.
However, the standby Power supply method of the present invention is not limited to be applied to a flyback Power conversion system, but may be applied to other Power systems with digital control and matching with an inductor component, such as a Buck (Buck) Power system, a Boost (Boost) Power system, a Buck-Boost (Buck-Boost) Power system, and a Power Factor Correction (PFC) system.
Drawings
Fig. 1 is a schematic operation flow diagram illustrating a standby power supply method according to an embodiment of the invention.
Fig. 2 is a system diagram of a power conversion system in a standby power supply method according to an embodiment of the invention.
Fig. 3 is a schematic diagram of another system of a power conversion system in a standby power supply method according to an embodiment of the invention.
Fig. 4 is a system diagram of a power conversion system in a standby power supply method according to an embodiment of the invention.
Fig. 5 is a schematic diagram of another system of a power conversion system in a standby power supply method according to an embodiment of the invention.
Fig. 6 is a system diagram of a power conversion system in a standby power supply method according to an embodiment of the invention.
Description of the reference numerals
S10, S20, S30, S40 steps
S50, S52, S54, S56 steps
S60, S62, S64, S66 step
S70, S72, S74, S76
10 primary side digital controller
10A digital boost controller
10B digital voltage reduction controller
10C digital power factor correction controller
12 secondary side synchronous controller
20 rectifying unit
21 power supply unit
22 auxiliary resistance
30 transformer unit
40 current sensing unit
C output capacitor
CE secondary side output capacitor
D rectifier diode
DO secondary side rectifier diode
GND ground potential
IP primary side current
IS secondary side current
L-shaped winding
LA auxiliary winding
LP primary side winding
LS secondary winding
PGND primary side is connected to ground potential
Q switching unit
QP primary side switching unit
QS secondary side switching unit
RL load
SGND secondary side ground potential
T1 primary side power pin
T11 power supply pin
T12 power supply pin
T13 power supply pin
T2 primary side grounding pin
T21 grounding pin
T22 grounding pin
T23 grounding pin
T3 primary side drive pin
T31 drive pin
T32 drive pin
T33 drive pin
T4 current sensing pin
T42 feedback pin
T43 current sensing pin
TSD secondary side drive pin
TSG secondary side grounding pin
TSV secondary side power pin
VAC external input power supply
VCS current sense signal
VD drive signal
VDD Power supply Voltage
VFB feedback signal
VIN rectification power supply
VOUT output power supply
VPD primary side drive signal
VSD secondary side drive signal
VSV secondary side supply voltage
Detailed Description
The embodiments of the present invention will be described in more detail below with reference to the drawings and reference signs, so that those skilled in the art can implement the embodiments after reading the description.
Referring to fig. 1, an operation flow of a power supply method in a standby state according to an embodiment of the invention is schematically illustrated. As shown in fig. 1, the standby power supply method according to the embodiment of the invention includes steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74 and S76 to implement a power conversion function and a standby power supply function, and further can control standby power supply in a standby mode, especially to determine whether to resume normal power supply by using a wake-up mode to achieve the purpose of saving power and avoid power waste.
Specifically, the standby power supply method of the present invention starts from step S10, and detects the load level of the power output terminal when the power conversion system generates the operating power and outputs the operating power through the power output terminal.
Then, after step S10, step S20 is performed to determine whether the load level is not greater than the default standby load, and whether the load level is not greater than the default standby load and is maintained for the preset standby time, and after step S20 has determined that the load level is not greater than the standby load and is maintained for the standby time, step S30 is performed to enter the standby selection mode.
After entering the standby selection mode in step S30, step S40 is executed to determine whether the power output terminal of the power conversion system is connected to a load or whether the connected load is disconnected from the power output terminal, and determine whether the connected load has a standby power requirement, so as to select a no-load mode (no-load mode), a sleep mode (sleep mode) or a power-down mode (power-down mode) as the standby mode. Further, if the power conversion system is not connected to a load or the connected load is disconnected from the power output, a no-load mode is entered, and if the connected load has a standby power requirement, a sleep mode is entered, and further, if the connected load does not have a standby power requirement, a power down mode is entered.
After determining that the power output terminal is not connected to the load in step S40, the method proceeds to step S50 to execute a no-load mode or a deep sleep mode, and then proceeds to step S52 to drive the power conversion system to generate the no-load sustaining power at the power output terminal, and then proceeds to step S54 to execute the no-load wake-up detection mode to detect whether the load level at the power output terminal is not less than the no-load wake-up level. Further, if the load level is not less than the idle wakeup level and remains for the idle wakeup time, step S56 of executing an idle recovery mode (no-load recovery mode) is performed to drive the power conversion system to generate the operating power, and step S10 is returned to.
Further, after it is determined in step S40 that the load is connected to the power output terminal and the load has a standby power demand, the method proceeds to step S60 to enter a sleep mode. Then, the method proceeds to step S62, where the power conversion system is driven to generate sleep maintenance power at the power output end to meet the standby power requirement, and then to step S64, where a sleep wake-up detection mode is executed to detect whether the load level at the power output end is not less than the sleep wake-up level. Further, if the load level is not less than the sleep wake-up level and is maintained for the sleep wake-up time, step S66 of executing a sleep recovery mode (sleep recovery mode) is performed, and the power conversion system is driven to generate operating power in the sleep recovery mode for the load to operate normally, and then the process returns to step S10.
Furthermore, if it is determined in step S40 that the power output terminal is connected to the load and the load does not have the standby power requirement, the method proceeds to step S70 to enter a power down mode (power down mode), and executes the power down mode in step S72 to drive the power conversion system not to generate power to stop supplying power to the load through the power output terminal, and then proceeds to step S74 to execute the wake-up detection mode to detect whether the load level of the power output terminal is not less than the wake-up level. Further, if the load level is not less than the power-off wake-up level and is maintained for the power-off wake-up time, the method goes to step S76 of performing a power-off recovery mode (power-off recovery mode), drives the power conversion system to generate operating power for the load to operate normally, and returns to step S10.
Preferably, the standby load is between 1 and 5% of full load (full loading), the standby time is between 0.1 and 10 milliseconds, the no-load maintaining power is between 0.1 and 10% of the operating power, the no-load wake-up degree is between 1 and 5% of full load, the no-load wake-up time is between 1 and 10 seconds, the sleep maintaining power is greater than or equal to the no-load maintaining power, the sleep wake-up degree is between 1 and 5% of full load, the power-off wake-up degree is between 1 and 5% of full load, the sleep wake-up time is between 1 and 10 seconds, and the power-off wake-up time is between 1 and 10 seconds. Of course, these values are merely exemplary and do not limit the scope of the invention.
It should be noted that the standby Power supply method of the present invention can be applied to a flyback Power conversion system with a synchronous rectification function, and can also be applied to a flyback Power conversion system without a synchronous rectification function, and is not only applied to a flyback Power conversion system, but also can be applied to other Power systems with digital control and matched inductor components, such as a Buck (Buck) Power system, a Boost (Boost) Power system, a Buck-Boost (Buck-Boost) Power system, and a Power Factor Correction (PFC) system.
More specifically, referring to fig. 2, the system schematic diagram of the power conversion system in the standby state power supply method according to the embodiment of the present invention is mainly used for a flyback power conversion system with a synchronous rectification function, and essentially includes a primary side digital controller 10, a secondary side synchronous controller 12, a rectification unit 20, a power supply unit 21, a transformer unit 30, a primary side switching unit QP, a secondary side switching unit QS, a secondary side output capacitor CE, and a current sensing unit 40, and the primary side digital controller 10 performs the above steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74, and S76. In addition, the primary-side digital controller 10 includes a primary-side power pin T1, a primary-side ground pin T2, a primary-side driving pin T3, and a primary-side current sensing pin T4, and the secondary-side synchronous controller 12 includes a secondary-side driving pin TSD, a secondary-side ground pin TSG, and a secondary-side power pin TSV.
Further, the transformer unit 30 may include a primary side winding LP and a secondary side winding LS coupled to each other. In addition, the primary side switching unit QP and the secondary side switching unit QS may include Metal-Oxide-Semiconductor (MOS) transistors, or Gallium Nitride field effect transistors (GaN) or silicon carbide-Metal Oxide field effect transistors (SiC-MOSFETs).
The rectifying unit 20 receives an external input power VAC and rectifies the external input power VAC to generate a rectified power VIN, and the power supply unit 21 also receives the external input power VAC, processes the rectified power VAC to generate and output a power voltage VDD, and receives the power voltage VDD from the power pin T1 to operate the primary-side digital controller 10. Similarly, the secondary-side synchronous controller 12 can also receive the power voltage VDD outputted by the power unit 21 from the secondary-side power pin TSV as the required secondary-side power voltage VSV, or additionally configure a secondary-side power unit (not shown) similar to the power unit 21 for the operation of the secondary-side synchronous controller 12. Since the power supply unit 21 and the secondary-side power supply unit are commonly used in the related art, they will not be described in detail below.
The primary-side ground pin T2 of the primary-side digital controller 10 is connected to the primary-side ground PGND, and the secondary-side ground pin TSG of the secondary-side synchronous controller 12 is connected to the secondary-side ground SGND, wherein the primary-side ground PGND and the secondary-side ground SGND may be the same ground potential or different ground potentials depending on the application environment.
One end of the primary winding LP is connected to the rectifying unit 20 for receiving the rectified power VIN, the drain of the primary switching unit QP is connected to the other end of the primary winding LP, the gate of the primary switching unit QP is connected to the primary driving pin T3 of the primary digital controller 10, and the source of the primary switching unit QP is connected to the current sensing pin T4 of the primary digital controller 10. In addition, one end of the current sensing unit 40 is connected to the current sensing pin T4, and the other end of the current sensing unit 40 is connected to the primary side ground PGND, and generates the current sensing signal VCS at the current sensing pin T4.
Further, the primary side digital controller 10 receives the current sensing signal VCS from the current sensing unit 40 through the current sensing pin T4, generates a primary side driving signal VPD according to the current sensing signal VCS, and transmits the primary side driving signal VPD to the gate of the primary side switching unit QP through the primary side driving pin T3 for controlling the turn-on and turn-off of the primary side switching unit QP to realize switching, thereby changing the primary side current IP of the primary side winding LP. More specifically, the primary side driving signal VPD is essentially a Pulse Width Modulation (PWM) signal, has a specific PWM frequency, and includes a periodic turn-on level and a turn-off level for periodically turning on or off the primary side switching unit QP and changing the primary side current IP of the primary side winding LP.
On the secondary side, one end of the secondary winding LS is connected to the drain of the secondary switching unit QS, the other end of the secondary winding LS is connected to the secondary ground SGND, the gate of the secondary switching unit QS is connected to the secondary driving pin TSD of the secondary synchronous controller 12, the source of the secondary switching unit QS is connected to one end of the secondary output capacitor CE and one end of the load R L, and the other end of the secondary output capacitor CE and the other end of the load R L are connected to the secondary ground SGND. In particular, a stable output power VOUT is generated at the source of the secondary side switching unit QS and supplies power to the load RL. In other words, the source of the secondary side switching unit 12 is used as the power output terminal.
The secondary winding LS generates a secondary current IS by electromagnetic induction with the primary winding LP, and the current IS flows through the secondary switching unit QS and the secondary output capacitor CE and the load RL under the control of the secondary synchronous controller 12, and the secondary output capacitor CE and the load RL are connected in parallel and then connected in series to the secondary switching unit QS.
Generally, the rectifying unit 20, the primary winding LP of the transformer unit 30, the primary switching unit QP, and the current sensing unit 40 form a primary loop, and the primary digital controller 10 controls on/off of the primary switching unit QP to control on-current flowing through the primary loop, while the secondary winding LS of the transformer unit 30, the secondary switching unit QS, and the secondary output capacitor CE form a secondary loop, and the secondary synchronous controller 12 controls on/off of the secondary switching unit QS to control on-current flowing through the secondary loop to achieve synchronous rectification, and generate a stable output power VOUT to supply the load RL in cooperation with the secondary output capacitor CE.
In other words, the primary-side digital controller 10 controls the current of the primary-side loop, and the transformer unit 30 generates the current of the secondary-side loop by electromagnetic induction, so as to be matched and controlled by the secondary-side synchronous controller 12.
Furthermore, the secondary side synchronous controller 12 generates a secondary side driving signal VSD according to the secondary side current IS or the drain-source voltage of the secondary side switching unit QS, and transmits the secondary side driving signal VSD to the gate of the secondary side switching unit QS through the secondary side driving pin TSD, so as to control the on/off of the secondary side switching unit QS. For example, the secondary synchronization controller 12 turns on the secondary switching unit QS by the secondary driving signal VSD when the secondary current IS negative, i.e., when the secondary current IS flows from the secondary winding LS to the secondary switching unit QS, or when the drain-source voltage of the secondary switching unit QS IS positive, and turns off the secondary switching unit QS by the secondary driving signal VSD when the secondary current IS positive, i.e., when the secondary current IS flows from the secondary switching unit QS to the secondary winding LS, or when the drain-source voltage of the secondary switching unit QS IS negative.
Referring to fig. 3, a schematic diagram of another system of a standby power supply method according to an embodiment of the invention is shown. As shown in fig. 3, the power conversion system may also include only the primary-side digital controller 10, the rectifying unit 20, the power unit 21, the transformer unit 30, the primary-side switching unit QP, the secondary-side rectifying diode DO and the current sensing unit 40, i.e., the secondary-side synchronous controller 12 and the secondary-side switching unit QS of fig. 2 are not included, and the secondary-side rectifying diode DO replaces the secondary-side switching unit QS, and in particular, the steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74 and S76 are still performed by the primary-side digital controller 10, and also include the primary-side power pin T1, the primary-side ground pin T2, the primary-side driving pin T3 and the primary-side current sensing pin T4, and it is to be noted that the electrical connection circuit of the primary-side digital controller 10 is kept unchanged as shown in fig. 2. In other words, the power conversion system of fig. 3 is a flyback power conversion system without a synchronous rectification function.
Further, the anode of the secondary side rectifier diode DO is connected to one end of the secondary side winding LS, one end of the secondary side output capacitor CE and one end of the load RL are connected to the cathode of the secondary side rectifier diode DO, and the other end of the secondary side winding LS, the other end of the secondary side output capacitor CE and the other end of the load RL are connected to the secondary side ground SGND, and the cathode of the secondary side rectifier diode DO generates the output power VOUT for supplying power to the load RL. In other words, the cathode of the secondary-side rectifier diode DO serves as the power output terminal.
In addition, the electrical connection manner of other components in fig. 3 is identical to that in fig. 2, and thus, the description is omitted.
With further reference to fig. 4, fig. 5, and fig. 6 to illustrate other exemplary embodiments of the present invention, which are respectively system diagrams of a Power conversion system in a standby Power supply method according to an embodiment of the present invention, the system diagrams are respectively a system diagram of a Power conversion system implemented by a BOOST (BOOST), BUCK (BUCK), and Power Factor Correction (PFC), which is different from a manner of implementing the Power conversion system by a flyback Power conversion circuit in fig. 2 and fig. 3, in other words, the operation flow of fig. 1 is also applicable to the Power conversion system in fig. 4, fig. 5, and fig. 6. Since the boost, buck, power factor corrected power conversion circuit is a general prior art, it is only briefly described hereinafter.
As shown in fig. 4, the power conversion system in the standby power supply method according to the embodiment of the invention includes a digital boost controller 10A, a rectifying unit 20, a power unit 21, a winding L, a switching unit Q, a rectifying diode D, and an output capacitor C, and in particular, the digital boost controller 10A performs the steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74, and S76 in fig. 1 to implement the step-down power conversion.
In addition, the digital boost controller 10A includes a power pin T11, a ground pin T21 and a driving pin T31, wherein the power pin T11 is connected to the power unit 21, the ground pin T21 is connected to the ground potential GND, and the driving pin T31 is connected to the gate of the switching unit Q to drive the switching unit Q. Further, the rectifying unit 20 receives an external input power VAC to generate a rectified power VIN, and the power supply unit 21 receives the external input power VAC to generate a power supply voltage VDD required by the digital boost controller 10A.
One end of the winding L is connected to the rectifying unit 20 to receive the rectified power VIN, a drain of the switching unit Q is connected to the other end of the winding L and an anode of the rectifying diode D, a cathode of the rectifying diode D is connected to one end of the output capacitor C, a source of the switching unit Q and the other end of the output capacitor C are connected to the ground potential GND, a cathode of the rectifying diode D is used as a power output terminal to generate the output power VOUT, one end of the load RL is connected to a cathode of the rectifying diode D to receive the output power VOUT to operate, and the other end of the load RL is connected to the ground potential GND.
In particular, the digital boost controller 10A generates a driving signal VD, and transmits the driving signal VD to the gate of the switching unit Q via the driving pin T31, wherein the driving signal VD is a Pulse Width Modulation (PWM) signal, has a PWM frequency, and includes a periodic turn-on level and a turn-off level for periodically turning on or off the switching unit Q. Furthermore, the switching unit Q changes the current of the winding L and flows to the output capacitor C and the load RL through the rectifying diode D, wherein the voltage of the output power VOUT generated by the cathode of the rectifying diode D is higher than the root-mean-square voltage of the external input power VAC, and thus has a boosted electrical characteristic.
Overall, the power conversion system of fig. 4 can implement a boost power conversion function.
As shown in fig. 5, the power conversion system in the standby power supply method according to the embodiment of the invention includes a digital buck controller 10B, a power unit 21, a winding L, a switching unit Q, a rectifying diode D, and an output capacitor C, and particularly, the digital buck controller 10B implements the buck power conversion by performing the steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74, and S76 in fig. 1.
In addition, the digital buck controller 10B includes a power pin T12, a ground pin T22, a driving pin T32 and a feedback pin T42, wherein the power pin T12 is connected to the power unit 21, the ground pin T22 is connected to the ground potential GND, and the driving pin T32 is connected to the gate of the switching unit Q to drive the switching unit Q. Further, the power supply unit 21 receives an external input power VAC to generate a power supply voltage VDD required by the digital buck controller 10B.
The drain of the switching unit Q receives an external input power VAC, one end of the winding L is connected to the source of the switching unit Q, and the other end of the winding L is connected to the current sensing pin T42 and the anode of the rectifying diode D, wherein the cathode of the rectifying diode D is connected to one end of the output capacitor C, and the other end of the output capacitor C is connected to the ground potential GND.
In addition, the negative electrode of the rectifier diode D is used as the power output terminal to generate the output power VOUT, one end of the load RL is connected to the negative electrode of the rectifier diode D to receive the output power VOUT for operation, and the other end of the load RL is connected to the ground potential GND. In particular, the other end of the winding L generates a feedback signal VFB, and the feedback signal VFB is transmitted to the digital buck controller 10B via the feedback pin T42 for generating a driving signal VD to drive the switching unit Q, so as to control the current flowing through the winding L, and further generate the required output power VOUT.
In particular, the digital buck controller 10B generates a driving signal VD according to the feedback signal VFB, and transmits the driving signal VD to the gate of the switching unit Q via the driving pin T32, wherein the driving signal VD is a Pulse Width Modulation (PWM) signal, has a PWM frequency, and includes a periodic turn-on level and a turn-off level for periodically turning on or off the switching unit Q. Furthermore, the switching unit Q changes the current of the winding L and flows to the output capacitor C and the load RL through the rectifying diode D, wherein the voltage of the output power VOUT generated by the cathode of the rectifying diode D is lower than the root-mean-square voltage of the external input power VAC, and thus has a step-down electrical characteristic.
Overall, the power conversion system of fig. 5 can implement the step-down power conversion function.
As shown in fig. 6, the power conversion system in the standby power supply method according to the embodiment of the invention includes a digital power factor correction controller 10C, a rectifying unit 20, an auxiliary resistor 22, a winding L, an auxiliary winding LA, a switching unit Q, a current sensing unit 40, a rectifying diode D, and an output capacitor C, and particularly, the digital power factor correction controller 10C performs the steps S10, S20, S30, S40, S50, S52, S54, S56, S60, S62, S64, S66, S70, S72, S74, and S76 in fig. 1 to achieve power factor correction.
In addition, the digital pfc controller 10C includes a power pin T13, a ground pin T23, a driving pin T33 and a current sensing pin T43, wherein the ground pin T23 is connected to the ground potential GND, and the driving pin T33 is connected to the gate of the switching unit Q to drive the switching unit Q. In particular, the auxiliary winding LA is coupled to the winding L, and one end of the auxiliary winding LA is connected to the ground potential GND, while the other end of the auxiliary winding LA is connected to one end of the auxiliary resistor 22, and the other end of the auxiliary resistor 22 is connected to the power pin T13. Furthermore, the auxiliary winding LA is operated by generating an induced voltage through electromagnetic induction, and generating a power voltage VDD from the other end of the auxiliary resistor 22 to supply the digital power factor correction controller 10C.
The rectifying unit 20 receives an external input power VAC to generate a rectified power VIN.
Furthermore, one end of the winding L is connected to the rectifying unit 20 to receive the rectified power VIN, the drain of the switching unit Q is connected to the other end of the winding L and the anode of the rectifying diode D, and the cathode of the rectifying diode D is connected to one end of the output capacitor C. The current sensing pin T43 is connected to the source of the switching unit Q and one end of the current sensing unit 40, and the other end of the current sensing unit 40 is connected to the ground potential GND, so that the current sensing signal VCS generated by the source of the switching unit Q is input to the current sensing pin T43 for the digital pfc controller 10C to control the driving pin T33, thereby correctly driving the switching unit Q.
In addition, the cathode of the rectifier diode D is used as the power output terminal to generate the output power VOUT, one end of the load RL is connected to the cathode of the rectifier diode D to receive the output power VOUT for operation, and the other end of the load RL is connected to the ground potential GND.
In particular, the digital pfc controller 10C generates a driving signal VD according to the current sensing signal VCS and transmits the driving signal VD to the gate of the switching unit Q through the driving pin T33, wherein the driving signal VD is a Pulse Width Modulation (PWM) signal having a PWM frequency and including a periodic turn-on level and a turn-off level for periodically turning on or off the switching unit Q. Furthermore, the switching unit Q changes the current of the winding L and flows to the output capacitor C and the load RL through the rectifying diode D, so that the negative electrode of the rectifying diode D generates the output power VOUT with the electrical characteristics of power factor correction under the control of the digital power factor correction controller 10C.
Overall, the power conversion system of fig. 6 can implement the power factor correction function.
For example, the switching unit Q may include a Metal-Oxide-Semiconductor (MOS) transistor, a Gallium Nitride field effect transistor (GaN) FET, or a silicon carbide-Metal Oxide Semiconductor field effect transistor (SiC-MOSFET).
It is to be noted, however, that the present invention is also applicable to a Buck-Boost (Buck-Boost) power supply system, and since the Buck-Boost power supply system is also the related art, the related art is not described below.
In summary, the present invention is characterized in that, in addition to providing a power supply function for power conversion, a primary-side digital controller can be used to interrupt power supply when a power conversion system is in a standby state, so as to effectively reduce overall energy consumption and greatly improve power saving efficiency, and particularly, whether the power conversion system enters the standby state is determined according to a load level, and a no-load mode, a sleep mode or a power-off mode is selected as the standby mode, so as to respectively drive the power conversion system to generate no-load maintaining power, sleep maintaining power or stop power from being supplied to a power output end, and further provide a no-load wake-up detection mode, a sleep wake-up detection mode and a power-off wake-up detection mode, so as to return to a normal power supply mode from the no-load mode, the sleep mode or the power-off mode.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting thereof in any way, and therefore, all modifications and variations that fall within the spirit of the invention are intended to be included within the scope thereof.
Claims (8)
1. A standby power supply method is used for realizing a power conversion function and a standby power supply function, and is characterized by comprising the following steps:
a step S10 of detecting a load degree borne by a power output terminal when a power conversion system generates an operation power as an output power and outputs the operation power through the power output terminal;
a step S20, after the step S10, of determining whether the load degree is not greater than a default standby load and is maintained for a predetermined standby time;
a step S30, entering a standby selection mode after the step S20 has determined that the load level is not greater than the standby load and is maintained for the standby time;
a step S40, after the step S30 enters the standby selection mode, of determining whether the power output terminal of the power conversion system is connected to a load, or whether the connected load is disconnected from the power output terminal, and determining whether the connected load has a standby power requirement, so as to select a no-load mode, a sleep mode or a power-down mode as a standby mode, if the power conversion system is not connected to the load, entering the no-load mode, and if the load has the standby power requirement, entering the sleep mode, and if the load does not have the standby power requirement, entering the power-down mode;
a step S50 of executing the idle mode or a deep sleep mode (deep sleep mode) after the step S40 determines that the load is not connected to the power output terminal;
a step S52, in the idle mode, driving the power conversion system to generate an idle sustaining power at the power output end, and then entering an idle wake-up detection mode;
a step S54, in the idle wakeup detect mode, detecting whether the load level of the power output terminal is not less than an idle wakeup level, and if the load level is not less than the idle wakeup level and is maintained for an idle wakeup time, entering an idle recovery mode (no-load recovery mode);
a step S56, in the idle recovery mode, driving the power conversion system to generate the operating power, and returning to the step S10;
a step S60 of executing the sleep mode after the step S40 determines that the load is connected to the power output terminal and the load has the standby power requirement;
a step S62, in the sleep mode, driving the power conversion system to generate a sleep maintenance power at the power output end to meet the standby power requirement, and then entering a sleep wake-up detection mode;
a step S64, in the sleep wake-up detection mode, detecting whether the load level of the power output terminal is not less than a sleep wake-up level, and if the load level is not less than the sleep wake-up level and is maintained for a sleep wake-up time, entering a sleep recovery mode;
a step S66 of driving the power conversion system to generate the operation power in the sleep recovery mode, and returning to the step S10;
a step S70, executing the power-off mode after the step S40 determines that the load is connected to the power output terminal and the load does not have the standby power requirement);
a step S72, in the power-off mode, driving the power conversion system not to generate power to stop supplying power to the load through the power output terminal, and then entering a power-off wake-up detection mode;
a step S74, in the power-off wake-up detection mode, detecting whether the load level of the power output terminal is not less than a power-off wake-up level, and if the load level is not less than the power-off wake-up level and is maintained for a power-off wake-up time, entering a power-off recovery mode; and
a step S76 of driving the power conversion system to generate the operation power in the power-off recovery mode, and returning to the step S10,
the standby load is between 1 and 5% of a full load (full load), the standby time is between 0.1 and 10 milliseconds, the no-load maintaining power is between 0.1 and 10% of the operating power, the sleep maintaining power is greater than or equal to the no-load maintaining power, the no-load awakening degree is between 1 and 5% of the full load, the sleep awakening degree is between 1 and 5% of the full load, the power-off awakening degree is between 1 and 5% of the full load, the no-load awakening time is between 1 and 10 seconds, the sleep awakening time is between 1 and 10 seconds, and the power-off awakening time is between 1 and 10 seconds.
2. The standby power method of claim 1, wherein the power conversion system comprises:
a primary-side digital controller for executing the step S10, the step S20, the step S30, the step S40, the step S50, the step S52, the step S54, the step S56, the step S60, the step S62, the step S64, the step S66, the step S70, the step S72, the step S74, and the step S76, and including a primary-side power pin, a primary-side ground pin, a primary-side driving pin, and a primary-side current sensing pin, the primary-side ground pin being connected to a primary-side ground potential;
a secondary side synchronous controller, which comprises a secondary side driving pin, a secondary side grounding pin and a secondary side power pin, wherein the secondary side grounding pin is connected to the secondary side grounding potential;
the rectifying unit receives and rectifies an external input power supply to generate a rectified power supply;
a power supply unit for receiving the external input power supply, processing the power supply unit and generating and outputting a power supply voltage, wherein the primary side power pin is connected with the power supply unit to receive the power supply voltage for the primary side digital controller, and the secondary side synchronous controller receives the power supply voltage through the secondary side power pin to be used as a secondary side power supply voltage;
a transformer unit including a primary side winding and a secondary side winding coupled to each other, one end of the primary side winding being connected to the rectifying unit to receive the rectified power;
a primary side switching unit, a drain of the primary side switching unit is connected with the other end of the primary side winding, and a gate of the primary side switching unit is connected with the primary side driving pin;
a current sensing unit, one end of the current sensing unit is connected to the primary side current sensing pin and a source electrode of the primary side switching unit, the other end of the current sensing unit is connected to the primary side ground potential, the current sensing pin generates a current sensing signal, and the current sensing signal is transmitted to the primary side digital controller through the current sensing pin;
a secondary side switching unit having a drain, a gate and a source; and
a secondary side output capacitor, the drain of the secondary side switching unit is connected to one end of the secondary side winding, one end of the secondary side winding is connected to the secondary side ground potential, the gate of the secondary side switching unit is connected to the secondary side driving pin, the source of the secondary side switching unit is connected to one end of the secondary side output capacitor and one end of the load, one end of the secondary side output capacitor and one end of the load are connected to the secondary side ground potential, the source of the secondary side switching unit is used as the power output end to generate the output power to supply power to the load, the primary side digital controller receives the current sensing signal from the current sensing unit through the current sensing pin, generates a primary side driving signal according to the current sensing signal, and transmits the primary side driving signal to the gate of the primary side switching unit through the primary side driving pin, the primary side driving signal is a Pulse Width Modulation (PWM) signal, has a PWM frequency, and includes a periodic turn-on level and a turn-off level for periodically turning on or off the primary side switching unit and changing a primary side current of the primary side winding, the secondary side synchronous controller generates a secondary side driving signal according to the secondary side current or a drain-source voltage of the secondary side switching unit, and transmits the secondary side driving signal to a gate of the secondary side switching unit through the secondary side driving pin so as to control the turn-on or turn-off of the secondary side switching unit, the secondary side winding generates a secondary side current by an electromagnetic induction effect with the primary side winding, and the secondary side current flows through the secondary side switching unit and the secondary side output capacitor under the control of the secondary side synchronous controller and reaches the load, and the secondary side output capacitor and the load are connected in parallel and then connected in series to the secondary side switching unit.
3. The method of claim 2, wherein the primary-side switching unit and the secondary-side switching unit comprise a Metal-Oxide-Semiconductor (MOS) transistor, a Gallium Nitride field effect transistor (GaN) FET, or a silicon carbide-Metal Oxide Semiconductor field effect transistor (SiC-MOSFET).
4. The standby state power supply method of claim 1 wherein the power conversion system comprises:
a primary-side digital controller for performing the step S10, the step S20, the step S30, the step S40, the step S50 and the step S60, and including a primary-side power pin, a primary-side ground pin, a primary-side driving pin and a primary-side current sensing pin, the primary-side ground pin being connected to a primary-side ground potential;
the rectifying unit receives and rectifies an external input power supply to generate a rectified power supply;
the power supply unit receives the external input power supply, generates and outputs a power supply voltage after processing, and the primary side power supply pin receives the power supply voltage for the primary side digital controller;
a transformer unit including a primary side winding and a secondary side winding coupled to each other, one end of the primary side winding being connected to the rectifying unit to receive the rectified power;
a primary side switching unit, a drain of the primary side switching unit is connected with the other end of the primary side winding, and a gate of the primary side switching unit is connected with the primary side driving pin;
a current sensing unit, one end of the current sensing unit is connected to the primary side current sensing pin and a source electrode of the primary side switching unit, the other end of the current sensing unit is connected to the primary side ground potential, the current sensing pin generates a current sensing signal, and the current sensing signal is transmitted to the primary side digital controller through the current sensing pin;
a secondary side rectifier diode, an anode of the secondary side rectifier diode is connected with one end of the secondary side winding; and
a secondary side output capacitor, one end of the secondary side output capacitor and one end of the load are connected with a cathode of the secondary side rectifying diode and the other end of the secondary side winding, the other end of the secondary side output capacitor and one end of the load are connected with a secondary side ground potential, the cathode of the secondary side rectifying diode is used as the power output end and generates the output power to supply power to the load, the primary side digital controller generates a primary side driving signal according to the current sensing signal and transmits the primary side driving signal to the gate of the primary side switching unit through the primary side driving pin, the primary side driving signal is a Pulse Width Modulation (PWM) signal, has a PWM frequency and comprises a periodic conduction level and a closing level and is used for periodically opening and closing the primary side switching unit and changing a primary side current of the primary side winding, and the secondary side winding generates a secondary side rectifying diode by utilizing the electromagnetic induction effect with the primary side winding and flows to the secondary side output capacitor and the load.
5. The method of claim 4, wherein the primary-side switching unit comprises a Metal-Oxide-Semiconductor (MOS) transistor, a Gallium Nitride field effect transistor (GaN) FET, or a silicon carbide-Metal-Oxide-Semiconductor field effect transistor (SiC-MOSFET).
6. The standby state power supply method of claim 1 wherein the power conversion system comprises:
a digital boost controller for performing the step S10, the step S20, the step S30, the step S40, the step S50 and the step S60 to realize a boost power conversion, and comprising a power pin, a ground pin and a driving pin, wherein the ground pin is connected to a ground potential;
the rectifying unit receives and rectifies an external input power supply to generate a rectified power supply;
the power supply unit receives the external input power supply, generates and outputs a power supply voltage after processing, and the power supply pin receives the power supply voltage for the digital boost controller;
one end of the winding is connected with the rectifying unit to receive the rectified power supply;
a switching unit having a drain, a gate and a source, wherein the drain is connected to another end of the winding, the driving pin is connected to the gate to drive the switching unit, and the source is connected to the ground potential;
a rectifying diode, an anode of which is connected with the drain; and
one end of the output capacitor and one end of the load are connected with a cathode of the rectifier diode, the other end of the output capacitor and the other end of the load are connected with the grounding potential, the cathode of the rectifier diode is used as the power output end to generate an output power supply to supply power to the load for operation, the digital boost controller generates a driving signal and transmits the driving signal to a gate of the switching unit through the driving pin, the driving signal is a Pulse Width Modulation (PWM) signal, has a PWM frequency and comprises a periodic conduction level and a closing level, and the switching unit is periodically turned on or turned off to further realize the boost power conversion function.
7. The standby state power supply method of claim 1 wherein the power conversion system comprises:
a digital buck controller for performing the steps S10, S20, S30, S40, S50 and S60 to realize a buck power conversion, and including a power pin, a ground pin, a driving pin and a feedback pin, wherein the ground pin is connected to a ground potential;
the power supply unit receives an external input power supply, generates and outputs a power supply voltage after processing, and the power supply pin is connected to the power supply unit to receive the power supply voltage for the digital voltage reduction controller;
a winding;
a switching unit having a drain, a gate and a source, the source is connected to one end of the winding, the drain receives the external input power, the driving pin is connected to the gate to drive the switching unit, and the other end of the winding is connected to the feedback pin;
a rectifier diode, wherein an anode of the rectifier diode is connected with the feedback pin; and
one end of the output capacitor and one end of the load are connected with a cathode of the rectifier diode, the other end of the output capacitor and the other end of the load are connected with the grounding potential, the cathode of the rectifier diode is used as the power output end to generate an output power supply to supply power to the load for operation, the other end of the winding generates a feedback signal and transmits the feedback signal to the digital voltage reduction controller through the feedback pin, the digital voltage reduction controller generates a driving signal according to the feedback signal and transmits the driving signal to the gate of the switching unit through the driving pin, and the driving signal is a Pulse Width Modulation (PWM) signal, has a PWM frequency and comprises a periodic conduction level and a closing level and is used for periodically turning on or off the switching unit so as to realize the voltage reduction power supply conversion function.
8. The standby power method of claim 1, wherein the power conversion system comprises:
a digital power factor correction controller for performing the steps S10, S20, S30, S40, S50 and S60 to realize power factor correction power conversion, and comprising a power pin, a ground pin, a driving pin and a current sensing pin, wherein the power pin receives a power voltage, and the ground pin is connected to a ground potential;
the rectifying unit receives and rectifies an external input power supply to generate a rectified power supply;
one end of the winding is connected with the rectifying unit to receive the rectified power supply;
an auxiliary winding coupled to the winding, wherein one end of the auxiliary winding is connected to the ground potential, the other end of the auxiliary winding is connected to one end of an auxiliary resistor, the other end of the auxiliary resistor is connected to the power pin, the auxiliary winding generates an induced voltage by electromagnetic induction with the winding, and the other end of the auxiliary resistor generates the power voltage to supply the digital power factor correction controller for operation;
a switching unit having a drain, a gate and a source, wherein the drain is connected to another end of the winding, the gate is connected to the driving pin to drive the switching unit, and the source is connected to the current sensing pin and generates a current sensing signal;
a current sensing unit, wherein the current sensing pin is connected to one end of the current sensing unit, and the other end of the current sensing unit is connected to the grounding potential;
a rectifying diode, an anode of which is connected with the drain; and
one end of the output capacitor and one end of the load are connected with a cathode of the rectifier diode, the other end of the output capacitor and the other end of the load are connected with the grounding potential, the cathode of the rectifier diode is used as the power output end to generate an output power supply to supply power to the load for operation, the digital power factor correction controller generates a driving signal according to the current sensing signal and transmits the driving signal to a gate of the switching unit through the driving pin, the driving signal is a Pulse Width Modulation (PWM) signal, has a PWM frequency and comprises a periodic conduction level and a closing level, and the switching unit is periodically turned on or turned off to further realize the power conversion function of power factor correction.
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| CN202110770904.2A CN115603302A (en) | 2021-07-08 | 2021-07-08 | Standby state power supply method |
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| CN202110770904.2A CN115603302A (en) | 2021-07-08 | 2021-07-08 | Standby state power supply method |
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