CN213402826U - Composite power switch and switching power supply - Google Patents
Composite power switch and switching power supply Download PDFInfo
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- CN213402826U CN213402826U CN202022635068.0U CN202022635068U CN213402826U CN 213402826 U CN213402826 U CN 213402826U CN 202022635068 U CN202022635068 U CN 202022635068U CN 213402826 U CN213402826 U CN 213402826U
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Abstract
The utility model discloses a compound power switch and switching power supply. The composite power switch drives a main power device with high power consumption by using a pull-up transistor with low power consumption so as to drive the composite power switch to be conducted, and driving loss can be reduced. By adding the pull-down transistor with low power consumption, the control end voltage of the main power device can be quickly pulled down when the composite power switch is required to be turned off, the turn-off speed of the main power device is increased, and the switching loss is reduced. The composite power switch described in this embodiment can achieve both low driving loss and low cost.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a can realize low drive loss and low-cost compound power switch and switching power supply.
Background
A switching power supply, also called an exchange power supply or a switching converter, is a high-frequency power conversion device, and is a kind of power supply. The input of the switching power supply is generally an ac power supply (e.g., commercial power) or a dc power supply, and the output thereof is generally equipment requiring a dc power supply, such as a mobile phone, a notebook computer, etc., and the switching power supply is used for converting voltage and current between the two. The switching power supply utilizes a semiconductor power switching device to switch between a fully-open mode (saturation region) and a fully-closed mode (cut-off region), and the two modes have the characteristic of low dissipation; the transition between mode switching will have a higher dissipation but a shorter time and therefore will be more energy efficient and generate less waste heat. Ideally, the switching power supply itself does not consume electrical energy. In practice, however, when the current is large, the loss due to the on-resistance of the power switch device is not negligible. Especially in miniaturized portable power supplies, the selection of the on-resistance of the power switching device becomes a major point in the design of the power supply.
Commonly used power switching devices are bipolar NPN transistors and N-type metal-oxide-semiconductor transistors (NMOS transistors). The bipolar NPN transistor has the characteristics of low price and small on-resistance, and is widely applied to a low-power switch power supply. However, the bipolar NPN transistor is a current-driven switching device, and needs to be turned on by inputting a large current to its base, which increases the driving power consumption and driving difficulty. The NMOS tube is a voltage-driven type switching device, and can be conducted only by applying a voltage higher than the turn-on threshold value to the grid electrode of the NMOS tube, so that the NMOS tube is convenient to drive. The on-resistance can be linearly reduced by increasing the size of the NMOS tube, so that the NMOS tube is widely applied to medium and high power switching power supply application. However, the manufacturing process of the NMOS is complicated, if a close conduction effect is to be obtained, the cost of the NMOS is higher than that of the bipolar NPN, and the cost difference between the NMOS and the bipolar NPN becomes larger and larger as the on-resistance is further reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a compound power switch and switching power supply to the technical problem who exists among the prior art, can realize low drive loss and low-cost purpose.
To achieve the above object, the present invention provides a compound power switch, which has a first port, a second port, a third port, a fourth port and a fifth port; the compound power switch includes: a pull-up transistor having a first terminal coupled to the first port, a second terminal coupled to an internal node, and a control terminal coupled to the third port, the pull-up transistor configured to turn on in response to a first drive signal to generate an on drive signal at the internal node; a pull-down transistor having a first terminal connected to the internal node, a second terminal connected to the fifth port, and a control terminal connected to the fourth port, the pull-down transistor being configured to turn on in response to a second driving signal to pull down a voltage of the internal node; a main power device having a first terminal connected to the first port, a second terminal connected to the second port, and a control terminal connected to the internal node, wherein the main power device is configured to be turned on in response to the turn-on driving signal, or turned off after the voltage of the internal node is pulled down; and at the same time, only one of the pull-up transistor and the pull-down transistor is in a conducting state, and the driving power consumption of the pull-up transistor and the pull-down transistor is smaller than that of the main power device.
In order to achieve the above object, the present invention further provides a switching power supply, including an electromagnetic induction element for receiving an input voltage, and a switch connected to the electromagnetic induction element; the switch adopts the composite power switch of the utility model; a first port of the composite power switch is connected with the electromagnetic induction element, a second port of the composite power switch is grounded or grounded through a current detection resistor, a fifth port of the composite power switch is grounded or connected to the second port, a third port of the composite power switch receives a first driving signal, and a fourth port of the composite power switch receives a second driving signal; when the main power device of the compound power switch is conducted, the induction current of the electromagnetic induction element rises.
The utility model has the advantages that: the utility model provides a compound power switch, which drives a large-power NPN type triode by using a small-power NMOS tube to drive the conduction of the compound power switch, thereby reducing the driving loss; by adding the NMOS tube with low power consumption, the base voltage of the NPN type triode can be quickly pulled down when the composite power switch needs to be turned off, the turn-off speed of the NPN type triode is increased, and the switching loss is reduced. Adopt the utility model discloses compound power switch's switching power supply can compromise and realize low drive loss and low-cost purpose.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic diagram of an embodiment of a composite power switch according to the present invention;
fig. 2 is a schematic diagram of an embodiment of a switching power supply of the present invention;
fig. 3 is a schematic diagram of a switching power supply according to another embodiment of the present invention;
fig. 4 is a schematic diagram of an operating waveform of the switching power supply shown in fig. 3.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention. The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In the description of the present invention, it is to be noted that the terms "connected" and "connected" are to be interpreted broadly unless otherwise explicitly defined or limited. For example, the components may be electrically connected or in communication with each other, directly or indirectly through intervening media, or may be in communication within or interacting with each other. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, a schematic diagram of an embodiment of a composite power switch according to the present invention is shown. The hybrid power switch 10 of the present embodiment has a first port C, a second port E, a third port G1, a fourth port G2, and a fifth port S. The compound power switch 10 includes: a pull-up transistor 11, a pull-down transistor 12, and a main power device 13.
The first terminal of the pull-up transistor 11 is connected to the first port C, the second terminal thereof is connected to an internal node N, and the control terminal thereof is connected to the third port G1. The pull-up transistor 11 is configured to turn on in response to a first driving signal to generate a turn-on driving signal at the internal node N.
The pull-down transistor 12 has a first terminal connected to the internal node N, a second terminal connected to the fifth port S, and a control terminal connected to the fourth port G2. The pull-down transistor 12 is configured to turn on in response to a second driving signal to pull down the voltage of the internal node N. Wherein only one of the pull-up transistor 11 and the pull-down transistor 12 is in a conducting state at the same time.
The first end of the main power device 13 is connected to the first port C, the second end thereof is connected to the second port E, and the control end thereof is connected to the internal node N. The main power device is configured to be turned on in response to the turn-on driving signal or turned off after the voltage of the internal node N is pulled low. Wherein, the driving power consumption of the pull-up transistor 11 and the pull-down transistor 12 are both smaller than the driving power consumption of the main power device 13.
The composite power switch 10 of the present embodiment can reduce the driving loss by using the pull-up transistor 11 with low power consumption to drive the main power device 13 with high power consumption to drive the composite power switch 10 to be turned on. By adding the pull-down transistor 12 with low power consumption, when the compound power switch 10 needs to be turned off, the control end voltage of the main power device 13 can be quickly pulled down, the turn-off speed of the main power device 13 is increased, and the switching loss is reduced. The compound power switch 10 of the present embodiment can achieve both low driving loss and low cost.
In a further embodiment, the pull-up transistor 11 is a first NMOS transistor M1. The drain of the first NMOS transistor M1 is connected to the first port C, the source thereof is connected to the internal node N, and the gate thereof is connected to the third port G1. The first driving signal is a first high level applied to the gate of the first NMOS transistor M1; wherein the first high level is higher than a threshold level of the first NMOS transistor M1. That is, when the first driving signal is applied to the gate of the first NMOS transistor M1, the first NMOS transistor M1 is turned on.
In a further embodiment, the pull-down transistor 12 is a second NMOS transistor M2. The drain of the second NMOS transistor M2 is connected to the internal node N, the source thereof is connected to the fifth port S, and the gate thereof is connected to the fourth port G2. The second driving signal is a second high level applied to the gate of the second NMOS transistor M2; wherein the second high level is higher than a threshold level of the second NMOS transistor M2. That is, when the second driving signal is applied to the gate of the second NMOS transistor M2, the second NMOS transistor M2 is turned on.
In a further embodiment, the main power device 13 is an NPN transistor Q0. The collector of the NPN transistor Q0 is connected to the first port C, the emitter thereof is connected to the second port E, and the base thereof is connected to the internal node N. The conducting driving signal is a driving current for driving the NPN type triode Q0 to conduct. That is, when the first NMOS transistor M1 is turned on, the first port C generates a driving current at the internal node N through the turned-on first NMOS transistor M1, and drives the NPN transistor Q0 to be turned on. When the first NMOS transistor M1 is turned off, the base voltage of the NPN transistor Q0 (i.e., the voltage at the internal node N) can be pulled down quickly through the turned-on second NMOS transistor M2, so as to increase the turn-off speed of the NPN transistor Q0 and reduce the switching loss.
Based on the same invention concept, the utility model also provides an adopt the utility model discloses compound power switch's switching power supply. Referring to fig. 2, an architecture of an embodiment of the switching power supply of the present invention is schematically illustrated. In the present embodiment, the switching power supply 20 includes an electromagnetic induction element 21 receiving an input voltage Vin, and the composite power switch 10 connected to the electromagnetic induction element 21. Specifically, in the present embodiment, the electromagnetic induction element is an inductor LM。
In the application of the switching power supply 20, the first port C of the composite power switch 10 is connected to the inductor LMA second port E of the compound power switch 10 is grounded (in other embodiments, the second port E may also be grounded through a current detection resistor), a fifth port S of the compound power switch 10 is grounded (in other embodiments, the fifth port S may also be connected to the second port E), and a third port G1 of the compound power switch 10 receives a first driving signal VG1The fourth port G2 of the composite power switch 10 receives a second driving signal VG2。
When the main power device (the NPN transistor Q0) of the composite power switch 10 is turned on, the inductor LMInduced current I ofLRise and store electrical energy. When the main power device of the compound power switch 10 is turned off, the inductor LMInduced current I ofLTo an output circuit (not shown).
The conduction control principle of the composite power switch 10 is as follows: applying a second driving signal V of a second level to the fourth port G2G2(the second level is low, e.g. V at this timeG20V), the second NMOS transistor M2 is turned off; applying a first drive signal V of a first level at said third port G1G1(the first level is high and is higher than the threshold level of M1, e.g. V at this timeG110V), the first NMOS transistor M1 is turned on; the voltage Vc at the first port C generates a driving current I through the conducted first NMOS transistor M1DAnd driving the NPN type triode Q0 to be conducted. A voltage Vc at the first port CThe corresponding current Ic flows through the conducted NPN type triode Q0, and the first current I flows out of the NPN type triode Q0EFlows into the ground. Inductive current ILA first current I flowing from the second port E of the compound power switch 10EAre equal.
The turn-off control principle of the compound power switch 10 is as follows: applying a first driving signal V of a second level to the third port G1G1(the second level is low, e.g. V at this timeG10V), the first NMOS transistor M1 is turned off, and the NPN transistor Q0 is driven to turn off; in order to increase the turn-off speed of the NPN transistor Q0, a first level of a second driving signal V is applied to the fourth port G2G2(the first level is high and is higher than the threshold level of M2, e.g. V at this timeG2And 5V), the second NMOS transistor M2 is turned on, so that the base voltage of the NPN transistor Q0 is pulled down quickly, the turn-off speed of the NPN transistor Q0 is increased, and the switching loss is reduced.
According to the switching power supply, the NMOS tube with low power consumption is used for driving the NPN type triode with high power consumption so as to drive the composite power switch to be conducted, and the driving loss can be reduced; by adding the NMOS tube with low power consumption, the base voltage of the NPN type triode can be quickly pulled down when the composite power switch needs to be turned off, the turn-off speed of the NPN type triode is increased, and the switching loss is reduced. Adopt the utility model discloses compound power switch's switching power supply can compromise and realize low drive loss and low-cost purpose.
Please refer to fig. 3-4, in which fig. 3 is a schematic diagram of a switching power supply according to another embodiment of the present invention, and fig. 4 is a schematic diagram of an operating waveform of the switching power supply shown in fig. 3.
As shown in fig. 3, in the present embodiment, the switching power supply 30 includes an input circuit 31, an output circuit 32, an electromagnetic induction element 33, the composite power switch 10, and a switch control circuit 34. The electromagnetic induction element 33 is connected between the input circuit 31 and the output circuit 32; the electromagnetic induction element 33 is used for converting the electric energy of the input circuit 31 into the output circuit 32 under the control of the compound power switch 10. Specifically, in the present embodiment, the electromagnetic induction element 33 is a transformer T1; the primary winding of the transformer T1 is connected to the input circuit 31 and the compound power switch 10, and the secondary winding of the transformer T1 is connected to the output circuit 32.
In the application of the switching power supply 30, the first port C of the hybrid power switch 10 is connected to the primary winding of the transformer T1, the second port E of the hybrid power switch 10 is grounded through a current detection resistor Rcs (in other embodiments, the second port E may also be directly grounded), the fifth port S of the hybrid power switch 10 is grounded (in other embodiments, the fifth port S may also be connected to the second port E), and the third port G1 of the hybrid power switch 10 receives a first driving signal VG1The fourth port G2 of the composite power switch 10 receives a second driving signal VG2。
When the main power device (the NPN transistor Q0) of the compound power switch 10 is turned on, the induced current I of the main winding of the transformer T1LRise and store electrical energy. Inductive current ILA first current I flowing from the second port E of the compound power switch 10EEqual; a first current IEFlows into the ground through a current detection resistor Rcs connected between the second port E and the ground. When the main power device of the compound power switch 10 is turned off, the electrical energy stored in the primary winding of the transformer T1 can be converted to the output circuit 32 through the transformer T1. The main power device of the compound power switch 10 is turned on repeatedly to charge the main winding of the transformer T1 when the inductor current I flowsLWhen the preset value is reached, the main power device of the compound power switch 10 is quickly turned off, so that the electric energy in the input circuit 31 can be continuously converted into the output circuit 32.
Specifically, the switching control circuit 34 of the switching power supply 30 includes: a conduction control module 341, a logic processing module 342, a first driving module 343, and a second driving module 344.
The conduction control module 341 is used for generatingA periodic pulse signal VSet. The logic processing module 342 is used for outputting a first control signal V of a first level (e.g. high level) according to the pulse signal VSetQ1To the first driving module 343, and outputs a second control signal V of a second level (e.g., a low level)Q2To the second drive module 344. The first driving module 343 is configured to generate the first control signal V according to a first levelQ1Generating said first drive signal V at a first levelG1And outputs the voltage to the third port G1 to drive a pull-up transistor (i.e., the first NMOS transistor M1) of the composite power switch 10 to conduct, thereby conducting a main power device (i.e., the NPN transistor Q0) of the composite power switch 10. The second driving module 344 is configured to generate the second control signal V according to a second levelQ2Generating the second drive signal V at a second levelG2And outputs the voltage to the fourth port G2 to drive the pull-down transistor (i.e. the second NMOS transistor M2) of the composite power switch 10 to turn off.
In a further embodiment, the switch control circuit 34 of the switching power supply 30 further includes: the comparator 345 is turned off. The turn-off comparator 345 has a positive input terminal connected to the second port E and a negative input terminal connected to the logic processing module 342, and is grounded via a current detection resistor Rcs to receive a detection voltage Vcs. The turn-off comparator 345 is configured to output a turn-off control signal V when the detection voltage Vcs is higher than the reference voltage VrefRTo the logic processing module 342. The logic processing module 342 is further configured to turn off the control signal V according toROutputting the first control signal V at a second levelQ1To the first driving module 343, and outputs the second control signal V of the first levelQ2To the second drive module 344. The first driving module 343 is further configured to generate the first control signal V according to the second levelQ1Generating the first drive signal V at a second levelG1And outputs to the third port G1 to drive the pull-up transistor (i.e., the first NMOS transistor M1) to turn off. The second driveThe moving module 344 is further configured to generate the second control signal V according to the first levelQ2Generating said second drive signal V at a first levelG2And outputs the voltage to the fourth port G2 to drive the pull-down transistor (i.e., the second NMOS transistor M2) to turn on, thereby turning off the main power device (i.e., the NPN transistor Q0).
In a further embodiment, the logic processing module 342 includes a flip-flop RS1 and an inverter INV 1. The set terminal S of the flip-flop RS1 receives the pulse signal VSet, and the reset terminal R thereof receives the turn-off control signal VRAnd the output terminal Q is connected to the first driving module 343. The inverter INV1 is connected between the output Q of the flip-flop RS1 and the second driving module 344, and is configured to invert the control signal output by the output Q of the flip-flop RS1 and output the inverted control signal.
The operating principle of the switching power supply 30 is as follows:
1) the turn-on control module 341 generates a periodic pulse signal VSet to make the output terminal of the flip-flop RS1 output a high-level first control signal VQ1And input to the first driving module 343; high level first control signal VQ1After inversion by the inverter INV1, the second control signal V of low level is obtainedQ2And input to the second driver module 344. The second driving module 344 outputs the second driving signal V of low levelG2To turn off the second NMOS transistor M2; the first driving module 343 outputs a high-level first driving signal VG1To turn on the first NMOS transistor M1, thereby driving the NPN transistor Q0 to turn on. The voltage Vc at the first port C of the compound power switch 10 drops and the inductor current I on the primary winding of the transformer T1LBegins to ramp up and store electrical energy. Inductive current ILA first current I flowing from the second port EEEqual; a first current IEFlows into the ground through a current detection resistor Rcs connected between the second port E and the ground.
2) When the inductive current ILWhen the voltage Vcs detected by the current detection resistor Rcs is higher than the reference voltage Vref, the output terminal of the turn-off comparator 34 outputs a high-level turn-off control signal VRCausing flip-flop RS1 to reset; the output end of the trigger RS1 outputs a first control signal V with low levelQ1And input to the first driving module 343; low level first control signal VQ1After inversion by the inverter INV1, the second control signal V of high level is obtainedQ2And input to the second driver module 344. The first driving module 343 outputs a low-level first driving signal VG1To turn off the first NMOS transistor M1, thereby driving the NPN transistor Q0 to turn off. The second driving module 344 outputs the second driving signal V of high levelG2The second NMOS transistor M2 is turned on, so that the base voltage of the NPN transistor Q0 is pulled down quickly, and the NPN transistor Q0 is turned off quickly. The electrical energy stored on the primary winding of transformer T1 is converted to output circuit 32 by transformer T1.
The main power device of the compound power switch 10 is turned on repeatedly to charge the main winding of the transformer T1 when the inductor current I flowsLWhen the preset value is reached, the main power device of the compound power switch 10 is quickly turned off, so that the electric energy in the input circuit 31 can be continuously converted into the output circuit 32. The operating waveform is shown in fig. 4.
According to the switching power supply, the NMOS tube with low power consumption is used for driving the NPN type triode with high power consumption so as to drive the composite power switch to be conducted, and the driving loss can be reduced; by adding the NMOS tube with low power consumption, the base voltage of the NPN type triode can be quickly pulled down when the composite power switch needs to be turned off, the turn-off speed of the NPN type triode is increased, and the switching loss is reduced. Adopt the utility model discloses compound power switch's switching power supply can compromise and realize low drive loss and low-cost purpose.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A compound power switch is characterized by comprising a first port, a second port, a third port, a fourth port and a fifth port; the compound power switch includes:
a pull-up transistor having a first terminal coupled to the first port, a second terminal coupled to an internal node, and a control terminal coupled to the third port, the pull-up transistor configured to turn on in response to a first drive signal to generate an on drive signal at the internal node;
a pull-down transistor having a first terminal connected to the internal node, a second terminal connected to the fifth port, and a control terminal connected to the fourth port, the pull-down transistor being configured to turn on in response to a second driving signal to pull down a voltage of the internal node;
a main power device having a first terminal connected to the first port, a second terminal connected to the second port, and a control terminal connected to the internal node, wherein the main power device is configured to be turned on in response to the turn-on driving signal, or turned off after the voltage of the internal node is pulled down;
and at the same time, only one of the pull-up transistor and the pull-down transistor is in a conducting state, and the driving power consumption of the pull-up transistor and the pull-down transistor is smaller than that of the main power device.
2. The compound power switch of claim 1, wherein the pull-up transistor is a first NMOS transistor; the drain electrode of the first NMOS tube is connected with the first port, the source electrode of the first NMOS tube is connected with the internal node, and the grid electrode of the first NMOS tube is connected with the third port; the first driving signal is a first high level applied to a grid electrode of the first NMOS tube; wherein the first high level is higher than a threshold level of the first NMOS transistor.
3. The composite power switch of claim 1, wherein the pull-down transistor is a second NMOS transistor; the drain electrode of the second NMOS tube is connected with the internal node, the source electrode of the second NMOS tube is connected with the fifth port, and the grid electrode of the second NMOS tube is connected with the fourth port; the second driving signal is a second high level applied to the grid electrode of the second NMOS tube; wherein the second high level is higher than a threshold level of the second NMOS transistor.
4. The compound power switch of claim 1, wherein the main power device is an NPN transistor; a collector of the NPN type triode is connected with the first port, an emitter of the NPN type triode is connected with the second port, and a base of the NPN type triode is connected with the internal node; the conduction driving signal is driving current for driving the NPN type triode to be conducted.
5. A switching power supply includes an electromagnetic induction element that receives an input voltage, and a switch connected to the electromagnetic induction element;
the hybrid power switch is characterized in that the switch adopts the hybrid power switch of any one of claims 1-4;
a first port of the composite power switch is connected with the electromagnetic induction element, a second port of the composite power switch is grounded or grounded through a current detection resistor, a fifth port of the composite power switch is grounded or connected to the second port, a third port of the composite power switch receives a first driving signal, and a fourth port of the composite power switch receives a second driving signal;
when the main power device of the compound power switch is conducted, the induction current of the electromagnetic induction element rises.
6. The switching power supply according to claim 5, wherein the switching power supply further comprises: the device comprises a conduction control module, a logic processing module, a first driving module and a second driving module;
the conduction control module is used for generating a periodic pulse signal;
the logic processing module is used for outputting a first control signal with a first level to the first driving module and outputting a second control signal with a second level to the second driving module according to the pulse signal;
the first driving module is configured to generate a first driving signal at a first level according to the first control signal at the first level, and output the first driving signal to the third port to drive a pull-up transistor of the composite power switch to be turned on, so as to turn on a main power device of the composite power switch;
the second driving module is configured to generate a second driving signal at a second level according to the second control signal at the second level, and output the second driving signal to the fourth port to drive the pull-down transistor of the composite power switch to turn off.
7. The switching power supply according to claim 6, wherein the switching power supply further comprises: turning off the comparator;
the positive input end of the turn-off comparator is connected to the second port and is grounded through a current detection resistor to receive a detection voltage, the negative input end of the turn-off comparator receives a reference voltage, and the output end of the turn-off comparator is connected to the logic processing module; the turn-off comparator is configured to output a turn-off control signal to the logic processing module when the detection voltage is higher than the reference voltage;
the logic processing module is further used for outputting the first control signal with a second level to the first driving module according to the turn-off control signal and outputting the second control signal with a first level to the second driving module;
the first driving module is further configured to generate a second level of the first driving signal according to the second level of the first control signal, and output the second level of the first driving signal to the third port to drive the pull-up transistor to be turned off;
the second driving module is further configured to generate a second driving signal at a first level according to the second control signal at the first level, and output the second driving signal to the fourth port to drive the pull-down transistor to be turned on, so as to turn off the main power device.
8. The switching power supply according to claim 5, wherein the logic processing module includes a flip-flop and an inverter; the set end of the trigger receives the pulse signal, the reset end of the trigger receives the turn-off control signal, and the output end of the trigger is connected to the first driving module;
the phase inverter is connected between the output end of the trigger and the second driving module and is used for outputting the control signal output by the output end of the trigger after inverting.
9. The switching power supply according to claim 5, further comprising an input circuit, an output circuit, said electromagnetic induction element being connected between said input circuit and said output circuit; the electromagnetic induction element is used for converting the electric energy of the input circuit into the output circuit under the control of the compound power switch.
10. The switching power supply according to claim 9, wherein said electromagnetic induction element is a transformer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659972A (en) * | 2021-09-13 | 2021-11-16 | 复旦大学 | Drive circuit and electronic device |
| CN116794504A (en) * | 2023-08-21 | 2023-09-22 | 深圳海辰储能控制技术有限公司 | Dry contact output detection circuit and method, energy storage system and storage medium |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659972A (en) * | 2021-09-13 | 2021-11-16 | 复旦大学 | Drive circuit and electronic device |
| CN113659972B (en) * | 2021-09-13 | 2024-01-05 | 复旦大学 | Driving circuit and electronic device |
| CN116794504A (en) * | 2023-08-21 | 2023-09-22 | 深圳海辰储能控制技术有限公司 | Dry contact output detection circuit and method, energy storage system and storage medium |
| CN116794504B (en) * | 2023-08-21 | 2024-01-02 | 深圳海辰储能科技有限公司 | Dry contact output detection circuit and method, energy storage system and storage medium |
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