CN210224944U - Protection self-locking circuit and switching power supply - Google Patents
Protection self-locking circuit and switching power supply Download PDFInfo
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- CN210224944U CN210224944U CN201921022860.XU CN201921022860U CN210224944U CN 210224944 U CN210224944 U CN 210224944U CN 201921022860 U CN201921022860 U CN 201921022860U CN 210224944 U CN210224944 U CN 210224944U
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Abstract
The application discloses protection self-locking circuit, switching power supply, protection self-locking circuit include voltage protection circuit, current protection circuit and self-locking circuit, wherein: the voltage protection circuit and the current protection circuit are both connected with the self-locking circuit, the voltage protection circuit is used for outputting a voltage fault signal after the sampling voltage exceeds a normal range, the current protection circuit is used for outputting a current fault signal after the sampling current exceeds the normal range, and the self-locking circuit is used for blocking the circuit state for protection after receiving the voltage fault signal or the current fault signal; it is thus clear, through the utility model discloses a protection self-locking circuit can be when circuit trouble, locks the fault condition fast, and protection main power circuit is after the trouble disappears, produces reset signal through system circuit, carries out the unblock to protection circuit, ensures that the circuit can continue to get into normal operating condition.
Description
Technical Field
The utility model relates to a circuit protection field especially relates to a protection self-locking circuit, switching power supply.
Background
With the wide-range application of power electronics, protection circuits play an increasingly important role. If the power electronic system fails, unexpected serious results are brought, so that the power electronic system needs to be provided with a very sound protection function circuit, and the protection circuit can be unlocked after the protection circuit acts.
In the existing application, various fault protections are generally realized by a DSP, but the reaction time of the DSP is relatively long, the requirement on a power supply system is high, and when the system fails, the stability of the power supply of the DSP cannot be ensured, and further the normal operation of a fault protection circuit cannot be ensured, so that the circuit is protected.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a protection self-locking circuit, switching power supply implements the embodiment of the utility model provides a, can lock the fault condition fast when the circuit trouble, protection main power circuit, after the trouble disappears, produce reset signal through system's circuit, unblock protection circuit, ensure that the circuit can continue to get into normal operating condition.
In a first aspect, an embodiment of the present invention provides a protection self-locking circuit, including voltage protection circuit, current protection circuit and self-locking circuit, wherein: the voltage protection circuit with the current protection circuit all with self-locking circuit connects, the voltage protection circuit is used for exporting voltage fault signal after sampling voltage surpasses normal range, the current protection circuit is used for exporting current fault signal after sampling current surpasses normal range, self-locking circuit is used for receiving voltage fault signal or behind the current fault signal, the blockade circuit state protects.
In one embodiment, the voltage protection circuit includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a first comparator, a current sampling port, a current comparison port and a first output port, two ends of the first resistor and the first capacitor connected in parallel are respectively connected to a positive input terminal and a ground of the first comparator, two ends of the second capacitor are respectively connected to a positive input terminal and a negative input terminal of the first comparator, the positive input terminal of the first comparator is connected to the current sampling port, the negative input terminal of the first comparator is connected to the current comparison port, two ends of the second resistor are respectively connected to the positive input terminal of the first comparator and the output terminal of the first comparator, two ends of the third resistor are respectively connected to the output terminal of the first comparator and the first output port, and two ends of the third capacitor are respectively connected with the first output port and the ground.
In one embodiment, the current protection circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a fourth capacitor, a fifth capacitor, a second comparator, a voltage sampling port, a voltage comparison port and a second output port, the fourth resistor and the fourth capacitor are connected in parallel, and two ends of the parallel connection are respectively connected with the positive input end of the second comparator and the ground, the positive phase input end of the first comparator is connected with the voltage sampling port, the negative phase input end of the first comparator is connected with the voltage comparison port, two ends of the fifth resistor are respectively connected with the positive phase input end of the second comparator and the output end of the first comparator, and two ends of the sixth resistor are respectively connected with the output end of the second comparator and the second output port, and two ends of the fifth capacitor are respectively connected with the second output port and the ground.
In one embodiment, the self-locking circuit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first diode, a second diode, a third comparator, a first power port, a reset signal port, and a signal output port, an anode of the first diode is connected to the first output port, an anode of the second diode is connected to the second output port, a cathode of the first diode and a cathode of the second diode are connected to one end of the seventh resistor, a positive-phase input end of the third comparator is connected to the other end of the seventh resistor, two ends of the eighth resistor are respectively connected to the positive-phase input end of the third comparator and the first power port, and two ends of the ninth resistor and the sixth capacitor after being connected in parallel are respectively connected to the positive-phase input end of the third comparator The two ends of the tenth resistor are respectively connected with the positive input end of the third comparator and the output end of the third comparator, the positive electrode of the third diode is connected with the reset signal port, the two ends of the eleventh resistor are respectively connected with the negative electrode of the third diode and the reverse input end of the third comparator, the two ends of the twelfth resistor and the seventh capacitor which are connected in parallel and in parallel are respectively connected with the reverse input end of the third comparator and the ground, the two ends of the thirteenth resistor are respectively connected with the output end of the third comparator and the signal output port, and the two ends of the eighth capacitor are respectively connected with the signal output port and the ground.
In one embodiment, when the protection self-locking circuit works normally, the first output port and the second output port both output low levels, the signal output port outputs low levels, and the rear-stage power switch circuit works.
In one embodiment, when the voltage protection circuit fails, the first output port outputs a high level, the signal output port outputs a high level, the protection self-locking circuit is locked, and the rear-stage power switch circuit does not work.
In one embodiment, when the current protection circuit fails, the second output port outputs a high level, the signal output port outputs a high level, the protection self-locking circuit is locked, and the rear-stage power switch circuit does not work.
In one embodiment, the signal output port is connected with a digital signal processor, and when the voltage protection circuit fails or the current protection circuit fails, the signal output port reports the circuit failure to the digital signal processor.
In one embodiment, after the fault is removed, a high level is applied to the reset signal port, and the protection self-locking circuit is removed from a locking state.
In a second aspect, an embodiment of the present invention provides a switching power supply, including the embodiment of the present invention provides a protection self-locking circuit disclosed by the first aspect.
The utility model discloses in, protection self-locking circuit includes voltage protection circuit, current protection circuit and self-locking circuit, wherein: the voltage protection circuit with the current protection circuit all with self-locking circuit connects, the voltage protection circuit is used for exporting voltage fault signal after sampling voltage surpasses normal range, the current protection circuit is used for exporting current fault signal after sampling current surpasses normal range, self-locking circuit is used for receiving voltage fault signal or behind the current fault signal, the blockade circuit state protects. It is thus clear, through the utility model discloses a protection self-locking circuit can be when circuit trouble, locks the fault condition fast, and protection main power circuit is after the trouble disappears, produces reset signal through system circuit, carries out the unblock to protection circuit, ensures that the circuit can continue to get into normal operating condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit block diagram of a protection self-locking circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a voltage protection circuit and a current protection circuit in a protection self-locking circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a self-locking circuit structure in a protection self-locking circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, system, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a circuit block diagram of a protection self-locking circuit according to an embodiment of the present invention. The protection self-locking circuit 100 described in this embodiment includes a voltage protection circuit 101, a current protection circuit 102, and a self-locking circuit 103, where: the voltage protection circuit 101 and the current protection circuit 102 are both connected with the self-locking circuit 103, the voltage protection circuit 101 is used for outputting a voltage fault signal after a sampling voltage exceeds a normal range, the current protection circuit 102 is used for outputting a current fault signal after a sampling current exceeds a normal range, and the self-locking circuit 103 is used for blocking a circuit state for protection after receiving the voltage fault signal or the current fault signal.
The embodiments of the present invention will be described in detail below.
In one possible example, as shown in fig. 2, the voltage protection circuit 101 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first comparator T1, a current sampling port current, a current comparison port VREF1, and a first output port OI, wherein two ends of the first resistor R1 and the first capacitor C1 connected in parallel are respectively connected to a positive-phase input terminal of the first comparator T1 and a ground, two ends of the second capacitor C2 are respectively connected to a positive-phase input terminal and an inverse-phase input terminal of the first comparator T1, a positive-phase input terminal of the first comparator T1 is connected to the current sampling port current, an inverse-phase input terminal of the first comparator T1 is connected to the current comparison port 1, two ends of the second resistor R2 are respectively connected to a positive-phase input terminal of the first comparator T1 and a positive-phase output terminal of the first comparator T1, two ends of the third resistor R3 are respectively connected to the output end of the first comparator T1 and the first output port OI, and two ends of the third capacitor C3 are respectively connected to the first output port OI and ground.
In one possible example, as shown in fig. 2, the current protection circuit 102 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a fourth capacitor C4, a fifth capacitor C5, a second comparator T2, a voltage sampling port vo, a voltage comparison port VREF2, and a second output port OVP, wherein two terminals of the fourth resistor R4 and the fourth capacitor C4 connected in parallel are respectively connected to a positive input terminal of the second comparator T2 and a ground, a positive input terminal of the first comparator T1 is connected to the voltage sampling port vo, an inverting input terminal of the first comparator T1 is connected to the voltage comparison port VREF2, two terminals of the fifth resistor R5 are respectively connected to a positive input terminal of the second comparator T2 and an output terminal of the first comparator T1, two terminals of the sixth resistor R6 are respectively connected to an output terminal of the second comparator T2 and the second output port OVP, two ends of the fifth capacitor C5 are respectively connected to the second output port OVP and ground.
In one possible example, as shown in fig. 3, the self-locking circuit 103 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first diode D1, a second diode D2, a third diode D3, a third comparator T3, a first power port V1, a RESET signal port RESET, and a signal output port DIS, the positive electrode of the first diode D1 is connected to the first output port OI, the positive electrode of the second diode D2 is connected to the second output port OVP, one end of the seventh resistor R7 is connected to the negative electrode of the first diode D1 and the negative electrode of the second diode D2, the other end of the seventh resistor R7 is connected to the positive electrode of the third comparator T1, and the positive electrode of the second comparator R867 is connected to the first input terminal V1 and the positive phase comparator V3, the ninth resistor R9 and the sixth capacitor C6 are connected in parallel, and two ends of the parallel connection are respectively connected to the non-inverting input terminal of the third comparator T3 and the ground, two ends of the tenth resistor R10 are respectively connected to the non-inverting input terminal of the third comparator T3 and the output terminal of the third comparator T3, the anode of the third diode D3 is connected to the RESET signal port RESET, two ends of the eleventh resistor R11 are respectively connected to the cathode of the third diode D3 and the inverting input terminal of the third comparator T3, the twelfth resistor R12 and the seventh capacitor C7 are connected in parallel, and two ends of the twelfth resistor R12 and the seventh capacitor C7 are respectively connected with the inverting input end of the third comparator T3 and the ground, two ends of the thirteenth resistor R13 are respectively connected to the output end of the third comparator T3 and the signal output port DIS, and two ends of the eighth capacitor C8 are respectively connected to the signal output port DIS and ground.
In one possible example, when the protection self-locking circuit works normally, the first output port and the second output port both output low levels, the signal output port outputs low levels, and the rear-stage power switch circuit works.
In one possible example, when the voltage protection circuit fails, the first output port outputs a high level, the signal output port outputs a high level, the protection self-locking circuit is locked, and the rear-stage power switch circuit does not work.
In one possible example, when the current protection circuit fails, the second output port outputs a high level, the signal output port outputs a high level, the protection self-locking circuit is locked, and the rear-stage power switch circuit does not work.
In one possible example, the signal output port is connected to a digital signal processor, and when the voltage protection circuit fails or the current protection circuit fails, the signal output port reports a circuit failure to the digital signal processor.
In one possible example, after the fault is released, a high level is applied to the reset signal port, and the protection self-locking circuit releases the locking state.
The circuit principle of the embodiment of the present invention is described in detail below.
As shown in fig. 2, the voltage protection circuit 101 is an overvoltage detection circuit, when the circuit is in overvoltage, the voltage protection circuit 101 outputs a voltage fault signal, the current protection circuit 102 is an overcurrent detection circuit, when the circuit is in overcurrent, the current protection circuit 102 outputs a current fault signal, optionally, the voltage protection circuit 101 and the current protection circuit 102 may be replaced by other protection circuits according to actual needs, such as an undervoltage protection circuit, an overtemperature protection circuit, and the like.
When the protection self-locking circuit 100 normally works, the value of the sampled current at the current sampling port current is smaller than the value of the current comparing port VREF1, i.e. the value of the positive input terminal of the first comparator T1 is smaller than the value of the negative input terminal, so the first output port OI of the first comparator T1 is at a low level, the value of the sampled voltage at the voltage sampling port vo is smaller than the value of the voltage comparing port VREF2, i.e. the value of the positive input terminal of the second comparator T2 is smaller than the value of the negative input terminal, so the second output port OVP of the second comparator T2 is at a low level, referring to fig. 3, the first diode 5639 and the second diode D2 form an or gate, only when the values of the first output port OI and the second output port OVP are at a low level, the positive input terminal of the third comparator T3 is at a low level, i.e. the output port DIS is at a low level, and the signal output port is connected to the driving circuit, at this time, the driving circuit works normally, and the power circuit driven by the driving circuit works normally. When any one of the voltage protection circuit 101 and the current protection circuit 102 fails, that is, when the first output port OI is at a high level, or the second output port OVP is at a high level, or both the first output port OI and the second output port OVP are at a high level, the third comparator T3 is inverted, the non-inverting input terminal of the third comparator T3 is at a high level, and the output terminal of the third comparator T3 is at a high level, that is, the signal output port DIS is at a high level, at this time, the driving circuit is turned off, and the power circuit driven by the driving circuit does not operate. After the fault is relieved, the current fault signal or the voltage fault signal disappears, the third comparator T3 is a hysteresis comparator and is a same-phase input, the hysteresis comparator has hysteresis characteristics and certain anti-jamming capability, after the fault signal disappears, because of the hysteresis characteristics of the hysteresis comparator, the state of the protection self-locking circuit is kept unchanged, when a high level is applied to the RESET signal port RESET, the third comparator T3 is turned over again, the input of the positive-phase input end of the third comparator T3 is smaller than the input of the reverse-phase input end, the output of the third comparator T3 is a low level, the protection self-locking circuit is relieved from locking, and the rear-stage power switch circuit works normally.
Optionally, the protection self-locking circuit may be adjusted according to actual conditions, for example, when the circuit normally works, the first output port OI and the second output port OVP are at a high level, and the signal output port DIS is at a high level, and when the circuit fails, the first output port OI and the second output port OVP are at a low level, and the signal output port DIS is at a low level.
Therefore, the protection self-locking circuit can quickly lock the fault state when the circuit is in fault, protects the main power circuit, can generate a reset signal through the system circuit after the fault disappears, unlocks the protection circuit, and ensures that the circuit can continuously enter the normal working state.
In one possible example, an embodiment of the present invention provides a switching power supply, which includes the protection self-locking circuit provided in any one of the above embodiments.
It should be noted that, for the sake of simplicity, the aforementioned embodiments of the present invention are described as a series of combinations of actions, but it should be understood by those skilled in the art that the present invention is not limited by the described order of actions, because some steps can be performed in other orders or simultaneously according to the present invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The embodiments of the present invention have been described in detail, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the above description of the embodiments is only used to help understand the present invention and its core ideas; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there may be changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. A protection self-locking circuit is characterized by comprising a voltage protection circuit, a current protection circuit and a self-locking circuit, wherein: the voltage protection circuit with the current protection circuit all with self-locking circuit connects, the voltage protection circuit is used for exporting voltage fault signal after sampling voltage surpasses normal range, the current protection circuit is used for exporting current fault signal after sampling current surpasses normal range, self-locking circuit is used for receiving voltage fault signal or behind the current fault signal, the blockade circuit state protects.
2. The protection self-locking circuit according to claim 1, wherein the voltage protection circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, a first comparator, a current sampling port, a current comparison port and a first output port, two ends of the first resistor and the first capacitor connected in parallel are respectively connected to a positive input end and a negative input end of the first comparator, two ends of the second capacitor are respectively connected to a positive input end and a negative input end of the first comparator, a positive input end of the first comparator is connected to the current sampling port, a negative input end of the first comparator is connected to the current comparison port, two ends of the second resistor are respectively connected to a positive input end of the first comparator and an output end of the first comparator, and two ends of the third resistor are respectively connected to an output end of the first comparator and the first output port, and two ends of the third capacitor are respectively connected with the first output port and the ground.
3. The protection self-locking circuit of claim 2, wherein the current protection circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a fourth capacitor, a fifth capacitor, a second comparator, a voltage sampling port, a voltage comparison port, and a second output port, the fourth resistor and the fourth capacitor are connected in parallel, and two ends of the parallel connection are respectively connected with the positive input end of the second comparator and the ground, the positive phase input end of the first comparator is connected with the voltage sampling port, the negative phase input end of the first comparator is connected with the voltage comparison port, two ends of the fifth resistor are respectively connected with the positive phase input end of the second comparator and the output end of the first comparator, and two ends of the sixth resistor are respectively connected with the output end of the second comparator and the second output port, and two ends of the fifth capacitor are respectively connected with the second output port and the ground.
4. The protection self-locking circuit according to claim 3, wherein the self-locking circuit comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first diode, a second diode, a third comparator, a first power port, a reset signal port and a signal output port, wherein an anode of the first diode is connected to the first output port, an anode of the second diode is connected to the second output port, one end of the seventh resistor is connected to a cathode of the first diode and a cathode of the second diode, the other end of the seventh resistor is connected to a positive-phase input terminal of the third comparator, and two ends of the eighth resistor are respectively connected to the positive-phase input terminal of the third comparator and the first power port, the two ends of the ninth resistor and the sixth capacitor which are connected in parallel and connected in parallel are respectively connected with the positive input end of the third comparator and the ground, the two ends of the tenth resistor are respectively connected with the positive input end of the third comparator and the output end of the third comparator, the anode of the third diode is connected with the reset signal port, the two ends of the eleventh resistor are respectively connected with the cathode of the third diode and the inverting input end of the third comparator, the two ends of the twelfth resistor and the seventh capacitor which are connected in parallel and connected in parallel are respectively connected with the inverting input end of the third comparator and the ground, the two ends of the thirteenth resistor are respectively connected with the output end of the third comparator and the signal output port, and the two ends of the eighth capacitor are respectively connected with the signal output port and the ground.
5. The protection self-locking circuit according to claim 4, wherein when the protection self-locking circuit operates normally, the first output port and the second output port both output a low level, the signal output port outputs a low level, and the rear stage power switch circuit operates.
6. The protection self-locking circuit according to claim 4, wherein when the voltage protection circuit fails, the first output port outputs a high level, the signal output port outputs a high level, the protection self-locking circuit is locked, and the rear-stage power switch circuit does not work.
7. The protection self-locking circuit according to claim 4, wherein when the current protection circuit fails, the second output port outputs a high level, the signal output port outputs a high level, the protection self-locking circuit is locked, and the rear-stage power switch circuit does not work.
8. The protection self-locking circuit according to claim 6 or 7, wherein the signal output port is connected with a digital signal processor, and when the voltage protection circuit fails or the current protection circuit fails, the signal output port reports a circuit failure to the digital signal processor.
9. The protection self-locking circuit according to claim 8, wherein after the fault is released, a high level is applied to the reset signal port, and the protection self-locking circuit is released from the locked state.
10. A switching power supply, characterized in that it comprises a protective self-locking circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022860.XU CN210224944U (en) | 2019-07-02 | 2019-07-02 | Protection self-locking circuit and switching power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022860.XU CN210224944U (en) | 2019-07-02 | 2019-07-02 | Protection self-locking circuit and switching power supply |
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| CN210224944U true CN210224944U (en) | 2020-03-31 |
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| CN201921022860.XU Active CN210224944U (en) | 2019-07-02 | 2019-07-02 | Protection self-locking circuit and switching power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342423A (en) * | 2020-04-07 | 2020-06-26 | 京东方科技集团股份有限公司 | Power supply hardware self-locking protection circuit |
| CN112134262A (en) * | 2020-09-28 | 2020-12-25 | 江苏雷利电机股份有限公司 | Protection circuit and circuit protection method for power device |
| CN113341344A (en) * | 2021-05-11 | 2021-09-03 | Tcl王牌电器(惠州)有限公司 | Circuit on-off detection device |
-
2019
- 2019-07-02 CN CN201921022860.XU patent/CN210224944U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342423A (en) * | 2020-04-07 | 2020-06-26 | 京东方科技集团股份有限公司 | Power supply hardware self-locking protection circuit |
| CN111342423B (en) * | 2020-04-07 | 2023-03-03 | 京东方科技集团股份有限公司 | Power supply hardware self-locking protection circuit |
| CN112134262A (en) * | 2020-09-28 | 2020-12-25 | 江苏雷利电机股份有限公司 | Protection circuit and circuit protection method for power device |
| CN112134262B (en) * | 2020-09-28 | 2022-09-02 | 江苏雷利电机股份有限公司 | Protection circuit and circuit protection method for power device |
| CN113341344A (en) * | 2021-05-11 | 2021-09-03 | Tcl王牌电器(惠州)有限公司 | Circuit on-off detection device |
| CN113341344B (en) * | 2021-05-11 | 2023-02-17 | Tcl王牌电器(惠州)有限公司 | Circuit on-off detection device |
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