CN108964169A - A kind of power control circuit, terminal and method - Google Patents
A kind of power control circuit, terminal and method Download PDFInfo
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- CN108964169A CN108964169A CN201810523915.9A CN201810523915A CN108964169A CN 108964169 A CN108964169 A CN 108964169A CN 201810523915 A CN201810523915 A CN 201810523915A CN 108964169 A CN108964169 A CN 108964169A
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- voltage
- enable signal
- power
- duration
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
- Power Sources (AREA)
Abstract
The embodiment of the present invention provides a kind of power control circuit, terminal and method, is related to field of terminal technology, to solve the problem of to lead to terminal persistent fever to increase the probability of damage terminal since functional module continues working.The power control circuit includes: time delay module and the power module that connect with the time delay module；The time delay module, for the voltage conversion duration for inputting the first enable signal of the time delay module to be extended for the first preset duration, to obtain the second enable signal, and second enable signal is output to the power module, a length of first enable signal is transformed into the duration of second voltage from first voltage when which converts；The power module, for receiving second enable signal of time delay module transmission, and for the functional module power supply corresponding with the power module, if the voltage of second enable signal not in the enabled voltage range of the power module, stops powering to the functional module.
Description
Technical field
The present embodiments relate to field of terminal technology more particularly to a kind of power control circuits, terminal and method.
Background technique
With the development of terminal technology, terminal using more and more extensive.Currently, a functional module can be right in terminal
A power module is answered, terminal can be that corresponding functional module is powered by software control power module.
In general, can be by central processing unit (Central Processing Unit, CPU), the microcontroller in terminal
The processing such as (Microcontroller Unit, MCU) or application processor (Application Processor, AP)
Device sends enable signal to power module, is that corresponding functional module is powered to control power module.Specifically, can be by
Processor in terminal sends the enable signal of high level to power module, to control power module as corresponding function mould
Block power supply；And low level enable signal can be sent from the processor in terminal to power module, to control power module
Stop being that corresponding functional module is powered.
However, when processor control power module is corresponding functional module power supply, if when terminal operating
Software break down (for example, system in case of system halt of terminal) when, then processor may without normal direction power module send it is low level
Enable signal stops powering to corresponding functional module, in this way, may be due to this to be unable to control the power module
Functional module continues working and leads to terminal persistent fever, to increase the probability of damage terminal.
Summary of the invention
The embodiment of the present invention provides a kind of power control circuit, terminal and method, to solve the software due to terminal operating
It breaks down, is unable to control power module and stops powering to functional module, functional module continues working and terminal is caused persistently to be sent out
Heat, thus the problem of increasing the probability of damage terminal.
In order to solve the above-mentioned technical problem, the embodiments of the present invention are implemented as follows:
In a first aspect, the embodiment of the present invention provides a kind of power control circuit, which includes time delay module
The power module being connect with the time delay module；The time delay module, for first enable signal of the time delay module will to be inputted
Voltage conversion duration is extended for the first preset duration, to obtain the second enable signal, and second enable signal is output to this
Power module, a length of first enable signal is transformed into the duration of second voltage from first voltage when which converts；The power supply
Module, for receiving second enable signal of time delay module transmission, and for the function mould corresponding with the power module
Block power in the case where, if the voltage of second enable signal not in the enabled voltage range of the power module, stop to
Functional module power supply.
Second aspect, the embodiment of the invention also provides a kind of terminal, which includes power supply control described in first aspect
Circuit processed.
The third aspect, the embodiment of the invention also provides a kind of power control methods, are applied to power control circuit, the electricity
Source control circuit includes power module；This method comprises: receiving the first enable signal；The voltage of first enable signal is converted
Duration is extended for the first preset duration, and to obtain the second enable signal, a length of first enable signal is from the when which converts
One voltage is transformed into the duration of second voltage；The case where the power module is the functional module power supply corresponding with the power module
Under, if the voltage for inputting second enable signal of the power module stops not in the enabled voltage range of the power module
Only power to the functional module.
The power control circuit provided in the embodiment of the present invention includes time delay module and the power supply mould connecting with time delay module
Block；Time delay module, for the voltage conversion duration of the first enable signal of input time delay module to be extended the first preset duration, with
Obtain the second enable signal, and the second enable signal be output to power module, voltage when converting a length of first enable signal from
First voltage is transformed into the duration of second voltage；Power module, for receiving the second enable signal of time delay module transmission, and
For the functional module power supply corresponding with power module, if the voltage of the second enable signal does not make in power module
In energy voltage range, then stop powering to functional module.In power control circuit work, since time delay module makes first
The voltage conversion duration of energy signal is extended for the first preset duration, when can control the work of power module according to time delay module
Long, if the voltage of the second enable signal on power module is converted to outside enabled voltage range, power module stops to work
Module for power supply avoids operational module and continues working fever so that operational module no longer continues working, and reduces terminal damage
Probability.
Detailed description of the invention
Fig. 1 is a kind of power control circuit schematic diagram one provided in an embodiment of the present invention；
Fig. 2 is a kind of power control circuit schematic diagram two provided in an embodiment of the present invention；
Fig. 3 is a kind of power control circuit schematic diagram three provided in an embodiment of the present invention；
Fig. 4 is a kind of power control circuit schematic diagram four provided in an embodiment of the present invention；
Fig. 5 is a kind of power control circuit schematic diagram five provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram of power control method provided in an embodiment of the present invention；
Fig. 7 is a kind of power supply control timing diagram one provided in an embodiment of the present invention；
Fig. 8 is a kind of power supply control timing diagram two provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
It should be noted that "/" herein indicate or the meaning, for example, A/B can indicate A or B；Herein
"and/or" is only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, it can
To indicate: individualism A exists simultaneously A and B, these three situations of individualism B." multiple " refer to two or more.
Term " first ", " second " and " third " in description and claims of this specification etc. are for distinguishing not
Same object, rather than it is used for the particular order of description object.For example, the first enable signal and the second enable signal are for area
Not different enable signals, rather than the particular order for describing enable signal.
It should be noted that in the embodiment of the present invention, " illustrative " or " such as " etc. words make example, example for indicating
Card or explanation.Be described as in the embodiment of the present invention " illustrative " or " such as " any embodiment or design scheme do not answer
It is interpreted than other embodiments or design scheme more preferably or more advantage.Specifically, " illustrative " or " example are used
Such as " word is intended to that related notion is presented in specific ways.
Some term/nouns involved in the embodiment of the present invention are explained below.
It is enabled: to refer to and be responsible for outputting and inputting for control signal；Enable end is an input pin or circuit for chip
One input port, the only pin activation, such as when being placed in high level, entire module could be worked normally.
It should be noted that enable signal can may be low level signal, this hair for the signal of a high level
Bright embodiment is not especially limited this.
It should be noted that mainly to enable signal to be illustrated for high level in the embodiment of the present invention, below not
It repeats again.
Referring to each attached drawing provided in an embodiment of the present invention to power control circuit provided in an embodiment of the present invention, end
End and method are illustratively illustrated.
Fig. 1 is a kind of power control circuit schematic diagram provided in an embodiment of the present invention, as shown in Figure 1, power control circuit
10 include time delay module 11 and the power module 12 connecting with time delay module 11；Time delay module 11 is used for input time delay module
The voltage conversion duration of 11 the first enable signal extends the first preset duration, to obtain the second enable signal, and second is made
Can signal be output to power module 12, voltage when converting a length of first enable signal from first voltage be transformed into second voltage when
It is long；Power module 12 for receiving the second enable signal of the transmission of time delay module 11, and is being corresponding with power module 12
In the case that functional module is powered, if the voltage of the second enable signal stops not in the enabled voltage range of power module 12
Only power to functional module.
Wherein, first voltage is the voltage of the first enable signal, and second voltage is that power module voltage makes under energy range
Voltage limit or upper limit voltage.When enable signal is that high level is effective, second voltage is that power module voltage makes energy range
Lower voltage limit.For example, enabled voltage range is [0.4V, 1V], when the voltage drop of enable signal is down to 0.4V or less, then power supply
Module stops output.
Optionally, the value of the value of first voltage and second voltage can preset different values according to different power modules,
The present invention is not especially limit this.
It should be noted that when the first enable signal is that the corresponding functional module of power module 12 needs work, at triggering
The enable signal for the power supply that device is sent is managed, terminal can determine one by variations such as the operation of detection user or environmental parameters
Whether a functional module, which needs, is powered.
Optionally, the power module in the embodiment of the present invention can be that (DC/DC converter is that transformation is defeated to DC/DC converter
Enter effectively to export after voltage the electric pressure converter of fixed voltage), low pressure difference linear voltage regulator (Low Dropout Regulator,
) or power switch (that is, output be equal to input) etc. LDO.Wherein, DC/DC converter is divided into three classes: step-up DC/DC converter
(BOOST power supply), voltage-dropping type DC/DC converter (BUCK power supply) and buck-boost type DC/DC converter (BUCK-BOOST electricity
Source).The present invention is not especially limit this.
The power control circuit provided in the embodiment of the present invention includes time delay module and the power supply mould connecting with time delay module
Block；Time delay module, for the voltage conversion duration of the first enable signal of input time delay module to be extended the first preset duration, with
Obtain the second enable signal, and the second enable signal be output to power module, voltage when converting a length of first enable signal from
First voltage is transformed into the duration of second voltage；Power module, for receiving the second enable signal of time delay module transmission, and
For the functional module power supply corresponding with power module, if the voltage of the second enable signal does not make in power module
In energy voltage range, then stop powering to functional module.In power control circuit work, since time delay module makes first
The voltage conversion duration of energy signal is extended for the first preset duration, when can control the work of power module according to time delay module
Long, if the voltage of the second enable signal on power module is converted to outside enabled voltage range, power module stops to work
Module for power supply avoids operational module and continues working fever so that operational module no longer continues working, and reduces terminal damage
Probability.
Optionally, in conjunction with Fig. 1, as shown in Fig. 2, power control circuit further includes the discharge module connecting with time delay module 11
13；Discharge module 13 extends the first preset duration for assisting time delay module 11 to convert the voltage into duration.
It should be noted that discharge module can assist the electricity of the second enable signal on time delay module control power module
Pressing Fast transforms is the voltage value made outside energy range, without closing the output of power module after the first preset duration, from
And power module quick closedown is exported.
Optionally, power module 12 may include three pins in above-mentioned Fig. 1 and Fig. 2, respectively enabled foot (enable foot
Or EN foot), power input foot (Vin foot) and power supply output pin (Vout foot), can also include certainly grounding leg (GND), work as electricity
The voltage of the enabled foot of source module 12 then exports electric energy by the output pin of power module 12 in enabled voltage range；Work as electricity
The voltage of the enabled foot of source module 12 is not in enabled voltage range, then power module 12 stops output electric energy.
A kind of possible implementation, in conjunction with Fig. 2, as shown in figure 3, time delay module 11 includes RC circuit, RC circuit includes
Capacitor 111 and resistance 112, the first end 111a of capacitor 111 is for inputting the first enable signal, the second end 111b of capacitor 111
It is connect with the first end 112a of resistance 112 and power module 12, the second end 112b ground connection of resistance 112.
Optionally, time delay module can be RC differential circuit, or RC differential circuit, timer and rate of exchange device are constituted
IC chip, the voltage of the second enable signal and power module voltage are made to by timer the lower voltage limit ratio of energy range at this time
Compared with the voltage if the second enable signal is continuously the first enabled letter greater than the voltage that can make on enabled foot if the lower voltage limit
Number voltage, the voltage on enabled foot can be made to reduce if the voltage of the second enable signal is less than or equal to the lower voltage limit
For low-voltage, to control whether power module powers, the present invention is not especially limit this.
Be illustrated so that RC circuit is RC differential circuit as an example in Fig. 3, can according to first voltage and second voltage and
Capacitance and resistance value in RC differential circuit determine the first preset duration,Wherein, when t is first default
It is long, V0Indicate first voltage, VsIndicate second voltage, τ=R*C, R indicate resistance value, and C indicates capacitance.
It should be noted that enabling the electricity on foot at this time when capacitor 111 in the first enable signal input time delay circuit
Pressure is identical as the first voltage of the first enable signal, and since the both end voltage of capacitor 111 cannot be mutated, capacitor 111 needs to charge,
Voltage on enabled pin is converted to second voltage by first voltage in the first preset duration, then the electricity at 111 both ends of capacitor
Pressure is also gradually increasing, wherein and the voltage at the end second end 111b of capacitor 111 gradually decreases, so that the first enable signal
Voltage transition time is extended for t, and after t, if the voltage of enabled foot does not make in energy range in the power supply, which stops
The functional module power supply corresponding to the power module.
When the software of terminal operating breaks down (for example, system in case of system halt of terminal), processor may be without normal direction power supply
Module sends low level enable signal, at this point, delay circuit mould in the energy supply control module provided according to embodiments of the present invention
Block, after the enable signal of input high level, power module can pass through delay circuit without receiving low level enable signal
Capacitor charging in module adjusts the voltage on the enabled foot of power module, and then passes through delay when the voltage on enabled foot reduces
The electricity in the capacitor in resistance release delay module in module, so that power module not only be made to stop supplying functional module
Electricity, it can also be ensured that the safety of power module.
A kind of possible implementation, discharge module include transistor, and the grid of transistor is used for input control signal, brilliant
The drain electrode of body pipe and the second end of capacitor connect, the source electrode ground connection of transistor；Wherein, control signal is auxiliary for controlling discharge module
It helps time delay module to convert the voltage into duration and extends the first preset duration.
It should be noted that transistor can be connected when grid voltage is higher than source voltage.
Optionally, transistor is N-type transistor or P-type transistor.Wherein, N-type transistor, that is, N-type metal-oxide-half
Conductor (N-Metal-Oxide-Semiconductor, N-MOS).P-type transistor (Positive Channel Metal
Oxide Semiconductor, P-MOS) refer to N-type substrate, P-channel, the metal-oxide-semiconductor of electric current is transported by the flowing in hole.
It should be noted that can choose high level signal when transistor is N-type transistor as control signal, working as crystalline substance
When body pipe is N-type transistor, low level signal can choose as control signal, the present invention is not especially limit this.
Illustratively, in conjunction with Fig. 3, as shown in figure 4, discharge module 13 includes N-MOS pipe 131, the grid of N-MOS pipe 131
131a is used for input control signal, and the drain electrode 131b of N-MOS pipe 131 is connect with the second end 111b of capacitor 111, N-MOS pipe 131
Source electrode 131c ground connection.
It is appreciated that terminal can be by processor to energy supply control module input control signal, through N-MOS pipe 131
Grid 131a input control signal, so that the voltage of grid 131a is higher than source electrode 131c voltage, so that N-MOS pipe 131 is led
It is logical, since the source electrode 131c of N-MOS pipe 131 is grounded, so that the capacitor 111 in control RC circuit can be managed by N-MOS
131 repid discharges, so that the voltage of quick 12 enable end of power module is reduced, so that voltage module stops output electric energy.
It should be noted that control signal can be defeated at any one moment after inputting enable signal to time delay module
Enter, for example, different functional modules can be with input control after time set duration different after processor inputs enable signal
To reasonably control the power supply of the corresponding functional module of each electric power source pair of module certainly, identical duration also may be selected in signal
Input control signal afterwards, the present invention is not especially limit this.
When the voltage of enabled foot becomes low level from high level, since 111 voltage of capacitor cannot be mutated, enabled foot becomes
Etc. amplitudes negative voltage, and the voltage of enabled foot is that negative voltage may cause the damage of power module 12, therefore can pass through N-MOS
The electric energy that capacitor 111 charges in 131 quick release time delay module 11 of pipe, so that the voltage of enabled foot is converted to positive electricity and forces down electricity
It is flat, on the one hand, 11 repid discharge of time delay module can be made, so that quickly control power module 12 stops power supply, on the other hand
So that power control circuit is safer.
A kind of possible implementation, discharge module include crystal diode, and the of the cathode of crystal diode and capacitor
The connection of two ends, the plus earth of crystal diode.
Optionally, crystal diode can be Schottky diode (Schottky Barrier Diode, SCD), SCD tool
There is the diode of " metal semiconductor junction " of Schottky characteristic, has the advantages that switching frequency height and forward voltage drop are low etc..
Illustratively, in conjunction with Fig. 3, as shown in figure 5, discharge module 13 includes Schottky diode 132, Schottky diode
132 cathode 132a is connect with the second end 111b of capacitor 111, the positive 132b ground connection of Schottky diode 132.
It should be noted that when the voltage of enabled foot becomes low level from high level, since 111 voltage of capacitor cannot dash forward
Become, therefore enabled foot such as becomes at the negative voltage of amplitudes, at this point, since Schottky diode 132 is grounded, Schottky diode 132
Conducting can be delayed since Schottky diode 132 can make the voltage clamping of enabled foot in -0.2V or so
Capacitor 111 in module 11 is discharged faster by Schottky diode 132, and final power module 12 closes output, and be delayed mould
Block 11 is resetted, and when enable signal inputs next time, time delay module 11 can be made to continue to extend the voltage of enable signal
Conversion time, to control the power supply that power module 12 is corresponding functional module.
The embodiment of the present invention also provides a kind of terminal, and terminal includes the power control circuit such as any one of Fig. 1-Fig. 5.
The embodiment of the present invention also provides a kind of power control method, is applied to power control circuit, the power control circuit
Including power module；Fig. 6 is a kind of flow diagram of power control method provided in an embodiment of the present invention: this method includes
S201-S203:
S201, power control circuit receive the first enable signal.
The voltage conversion duration of first enable signal is extended for the first preset duration by S202, power control circuit, with
To the second enable signal.
Wherein, a length of first enable signal is transformed into the duration of second voltage from first voltage when voltage is converted.
S203, in the case where power module is corresponding with power module functional module power supply, if input power module
The second enable signal voltage not in the enabled voltage range of power module, then power control circuit stops to functional module
Power supply.
Assuming that LDO power module is above-mentioned power module 12, delay circuit module is differential circuit module, then differential circuit
Electric discharge when a length of first preset duration, it is assumed that the first preset duration is 10 seconds, then after 10 seconds, the enabled foot of power module
On voltage be reduced to low level, that is to say, that stop to the LDO power module after about 10 seconds in the output of LDO power module
Corresponding functional module power supply.
Below with reference to Fig. 4 exemplary illustration, Fig. 7 is a kind of power supply control timing diagram provided in an embodiment of the present invention,
Assuming that current time t0 does not input enable signal (or low level enable signal), the i.e. enabled letter of input time delay module 11
Number it is defaulted as 0V, since resistance 112 is grounded, the voltage of the enabled foot of power module 12 is also 0V, when the power module 12 is corresponding
Functional module when needing work, processor exports the first enable signal of 1.8V to time delay module 11, due to 111 both ends of capacitor
Voltage cannot be mutated, and the voltage of enable end is converted to 1.8V (being input to the voltage of the second enable signal of enable end), at this point,
Power module 12 opens output and starts to power to corresponding functional module, it is assumed that the output end voltage of power module is 2.4v.With
The charging of capacitor 111, the voltage of enabled foot slowly decline, it is assumed that when the voltage that the t1 moment enables foot is reduced to 0.4V, then power supply
Module 12 closes output, and the voltage of power module gradually subtracts reduction, i.e. power module 12 stops powering to corresponding functional module.
Power control method provided in an embodiment of the present invention receives the first enable signal by power control circuit, by the
The voltage conversion duration of one enable signal extends the first duration, and to obtain the second enable signal, power control circuit is according to second
The voltage of enable signal is functional module power supply, the case where power module is the functional module power supply corresponding with power module
Under, if the voltage of the second enable signal of input power module, not in the enabled voltage range of power module, power supply controls
Circuit stops powering to functional module, and power control circuit control function module can be made no longer to continue working, avoid work
Fever is continued working as module, reduces the probability of terminal damage.
Optionally, in power control method provided in an embodiment of the present invention, above-mentioned S202 can pass through S202a and S202b
It realizes:
S202a, power control circuit receive control signal, and control signal converts the voltage into duration and be extended for for controlling
One preset duration.
S202b, under control of the control signal, power control circuit convert the voltage into duration be extended for first it is default when
It is long.
Optionally, " receiving control signal " in S202 can be executed by T1:
T1, it is receiving in the second preset duration after the first enable signal, is receiving control signal.
It should be noted that different time length, this hair can be arranged according to unused functional module in the second preset duration
Bright embodiment is not especially limited this.
In conjunction with Fig. 4, Fig. 8 is another power supply control timing diagram provided in an embodiment of the present invention.Assuming that control signal
It is effective for high level, it is preset in the control signal of beginning input high level after the duration T1 after inputting enable signal, at this time
Voltage on enabled pin is high level, and after input control signal, N-MOS pipe 131 is opened, and capacitor 111 starts to discharge, about
(such as T2=10us) powers on the enabled foot of power module 12 to press off the beginning and fall to low level after T2, when third is preset
In the signal of the grid 131a input low level of N-MOS pipe 131 after length, so that grid 131a voltage is set to low level, wherein can
The time span of input high level signal is arranged as third preset duration, such as third preset duration shown in figure is T3,
When enable signal inputs next time, power control circuit can continue to control the power supply of power module according to above-mentioned timing.
Power control method provided in an embodiment of the present invention, power control circuit receive control signal, in control signal
Under control, power control circuit converts the voltage into duration and is extended for the first preset duration, can power control circuit be changed
The time span of first preset duration can flexibly be selected as corresponding functional module power supply, improve power supply module work
Flexibility.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (10)
1. a kind of power control circuit, which is characterized in that the power control circuit include time delay module and with the delay mould
The power module of block connection；
The time delay module, for the voltage conversion duration for inputting the first enable signal of the time delay module to be extended for first
Second enable signal to obtain the second enable signal, and is output to the power module by preset duration, and the voltage turns
A length of first enable signal is transformed into the duration of second voltage from first voltage when changing；
The power module, second enable signal sent for receiving the time delay module, and for the electricity
In the case where the corresponding functional module power supply of source module, if the voltage of second enable signal does not make in the power module
In energy voltage range, then stop powering to the functional module.
2. power control circuit according to claim 1, which is characterized in that the power control circuit further include with it is described
The discharge module of time delay module connection；
The discharge module, for assist the time delay module by the voltage conversion duration be extended for described first it is default when
It is long.
3. power control circuit according to claim 2, which is characterized in that the time delay module includes RC circuit, described
RC circuit includes capacitor and resistance, and the first end of the capacitor is for inputting first enable signal, and the second of the capacitor
End is connect with the first end of the resistance and the power module, the second end ground connection of the resistance.
4. power control circuit according to claim 3, which is characterized in that the discharge module includes transistor, described
The grid of transistor is used for input control signal, and the drain electrode of the transistor is connect with the second end of the capacitor, the crystal
The source electrode of pipe is grounded；
Wherein, the control signal assists the time delay module to prolong voltage conversion duration for controlling the discharge module
A length of first preset duration.
5. power control circuit according to claim 4, which is characterized in that the transistor is that N-type transistor or p-type are brilliant
Body pipe.
6. power control circuit according to claim 3, which is characterized in that the discharge module includes crystal diode,
The cathode of the crystal diode is connect with the second end of the capacitor, the plus earth of the crystal diode.
7. a kind of terminal, which is characterized in that the terminal includes such as power supply of any of claims 1-6 control electricity
Road.
8. a kind of power control method, which is characterized in that be applied to power control circuit, the power control circuit includes power supply
Module；The described method includes:
Receive the first enable signal；
The voltage conversion duration of first enable signal is extended for the first preset duration, to obtain the second enable signal, institute
A length of first enable signal is transformed into the duration of second voltage from first voltage when stating voltage conversion；
In the case where the power module is the functional module power supply corresponding with the power module, if inputting the power supply mould
The voltage of second enable signal of block then stops not in the enabled voltage range of the power module to the function mould
Block power supply.
9. according to the method described in claim 8, it is characterized in that, the voltage by first enable signal converts duration
It is extended for the first preset duration, comprising:
Receive control signal, the control signal for control by the voltage convert duration be extended for described first it is default when
It is long；
Under the control of said control signal, voltage conversion duration is extended for first preset duration.
10. according to the method described in claim 8, it is characterized in that, the reception controls signal, comprising:
It is receiving in the second preset duration after first enable signal, is receiving the control signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110919662A (en) * | 2019-12-31 | 2020-03-27 | 东莞市李群自动化技术有限公司 | Safety circuit and robot |
| CN112320524A (en) * | 2020-11-03 | 2021-02-05 | 日立电梯电机（广州）有限公司 | Elevator rescue equipment, method, device and storage medium |
| CN114661130A (en) * | 2022-03-09 | 2022-06-24 | 湖南智领通信科技有限公司 | Power supply control circuit of CPU module and design method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467211A (en) * | 2010-11-12 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Electronic device |
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- 2018-05-28 CN CN201810523915.9A patent/CN108964169B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467211A (en) * | 2010-11-12 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Electronic device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110919662A (en) * | 2019-12-31 | 2020-03-27 | 东莞市李群自动化技术有限公司 | Safety circuit and robot |
| CN112320524A (en) * | 2020-11-03 | 2021-02-05 | 日立电梯电机（广州）有限公司 | Elevator rescue equipment, method, device and storage medium |
| CN114661130A (en) * | 2022-03-09 | 2022-06-24 | 湖南智领通信科技有限公司 | Power supply control circuit of CPU module and design method |
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