CN103427810A - Signal generator circuit - Google Patents
Signal generator circuit Download PDFInfo
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- CN103427810A CN103427810A CN2013103414451A CN201310341445A CN103427810A CN 103427810 A CN103427810 A CN 103427810A CN 2013103414451 A CN2013103414451 A CN 2013103414451A CN 201310341445 A CN201310341445 A CN 201310341445A CN 103427810 A CN103427810 A CN 103427810A
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Abstract
A signal generator circuit comprises a monitoring unit, a comparator unit, a self-locking protection unit and a power element. The monitoring unit is used for monitoring the terminal voltage of an external load and feeding back the terminal voltage to the comparator unit, the comparator unit comprises two comparators, a comparison upper limit voltage and a comparison lower limit voltage are respectively set, the two comparators respectively compare the terminal voltage with the comparison upper limit voltage and the comparison lower limit voltage, and output ends of the two comparators are respectively connected with the self-locking protection unit. When the value of the terminal voltage is larger than that of the comparison upper limit voltage or smaller than that of the comparison lower limit voltage, the self-locking protection unit of the signal generator circuit controls the power element to enter a cut-off state, so that the signal generator circuit is stopped from supplying electric energy for the external load and continuously locked in the protection state until faults are removed and an unlocking key is pressed, and the signal generator circuit restores normal work. By the aid of the signal generator circuit, the external load and a working power supply for supplying power for the external load can be effectively protected.
Description
Technical field
The present invention relates to a kind of signal generator circuit that can carry out the self-lock protection function to overcurrent, overvoltage that has.
Background technology
For signal generator circuit; especially in high voltage, the design of high-power signal generator circuit; when artificial misoperation (as the circuit output end error-polarity connection) and external load break down, whole system is caused damage, need in signal generator circuit, design some protected locations.
Usually the protected location design adopted is: (1) provides current-limiting protection when the circuit constant voltage is exported, and, when output current surpasses capping, exports no longer constant voltage, but with this upper current limit set point constant current output; (2) provide voltage-limiting protection when the circuit constant current output, when output voltage surpasses capping, export no longer constant current, but with this upper voltage limit set point constant voltage output.
Yet; in some specific application (as the test of high-power LED element working life); when overvoltage, overcurrent condition occurring, the protected location of above-mentioned signal generator circuit causes tested external load (high-power LED element) or sometimes to the damage of the working power of external load supplying.
Summary of the invention
In view of this, be necessary to provide a kind of signal generator circuit, this signal generator circuit can effectively be protected external load and to the working power of external load supplying simultaneously.
A kind of signal generator circuit, detect test signal is provided in order to the energising to external load, this signal generator circuit comprises monitoring means, comparator unit, self-lock protection unit and power component, described monitoring means is in order to the terminal voltage of monitoring external load and terminal voltage is fed back to comparator unit, described comparator unit comprises that the first comparator is set the contrast upper voltage limit and the second comparator is set the contrast lower voltage limit, described the first comparator is in order to compare terminal voltage and contrast upper voltage limit, described the second comparator is in order to compare terminal voltage and contrast lower voltage limit, the output of described the first comparator and the second comparator is connected with the self-lock protection unit respectively, this self-lock protection unit carries out the logic level judgement to the first comparator and second comparator of comparator unit, when when fault occurs, terminal voltage numerically is greater than the contrast upper voltage limit or is less than the contrast lower voltage limit, the described power component of described self-lock protection unit controls enters cut-off state to stop providing electric energy to external load, and continue to be locked in this state, described self-lock protection unit also comprises the release button, fault is pressed the release button after getting rid of, described signal generator circuit is controlled external load restoration energising.
Further, described self-lock protection unit comprises the NAND Logic module, protection module and the first triode, described NAND Logic module comprises the first diode, the second diode, the first resistance and the second triode, the negative pole of this first diode is connected to the output of the first comparator of comparator unit, the negative pole of this first diode is connected to the output of the first comparator of comparator unit, the positive pole of this first diode is connected to the base stage of the second triode, the negative pole of this second diode is connected to the output of the second comparator of comparator unit, the positive pole of this second diode is connected to the base stage of the second triode, the grounded emitter of this second triode, the collector electrode of this second triode is connected to the base stage of described the first triode and is connected to described protection module, the grounded emitter of this triode, the collector electrode of this first triode is connected to described power component.
Described protection module comprises the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and the 3rd diode; one operating voltage is connected with the base stage of described the first triode by described the second resistance; one negative voltage is connected with the base stage of the first triode by described the 3rd resistance; the positive pole of described the 3rd diode is connected with the base stage of the first triode; the negative pole of the 3rd diode is connected with the output of monitoring means by described the 4th resistance, and described the first electric capacity is in parallel with described the 3rd resistance.
Described protection module also comprises the 5th resistance and the second electric capacity be connected with the release button; described release button is in normally open; one end ground connection, the other end is connected with the output of monitoring means by described the 5th resistance, and described the second electric capacity is in parallel with this release button.
Described self-lock protection unit also comprises alarm module; described alarm module comprises light-emitting diode and the 3rd triode; one operating voltage is connected with the positive pole of described light-emitting diode; the base stage of described the 3rd triode is connected with protection module and is connected with the collector electrode of described the second triode; the grounded emitter of the 3rd triode, the collector electrode of the 3rd triode is connected with the negative pole of described light-emitting diode.
Described monitoring means comprises the first amplifier, the second amplifier, the 3rd amplifier, and the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the in-phase input end of described the first amplifier is connected to an end of described external load, the inverting input of this first amplifier is connected to the output of this first amplifier and is connected with the inverting input of described the second amplifier by the 6th resistance by the 7th resistance, the output of this first amplifier is connected to the in-phase input end of described the 3rd amplifier and is connected to described the 9th resistance ground connection again by this resistance the 8th resistance by described the 8th resistance, the in-phase input end of described the second amplifier is connected to the other end of described external load, the inverting input of this second amplifier is connected to the output of this second amplifier by described the tenth resistance, the output of this second amplifier is connected with the inverting input of described the 3rd amplifier by the 11 resistance, the inverting input of described the 3rd amplifier is connected with the output of the 3rd amplifier by described the 12 resistance, the output of the 3rd amplifier is connected with the inverting input of described the first comparator, the output of the 3rd amplifier is connected with the in-phase input end of described the second comparator.
Described comparator unit also comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and the 3rd electric capacity, the 4th electric capacity, described the 13 resistance, the 14 resistance and the 15 resistance and the 3rd electric capacity are in order to set a contrast upper voltage limit, described the 16 resistance, the 17 resistance and the 18 resistance and the 4th electric capacity are in order to set a contrast lower voltage limit, one operating voltage is successively by described the 13 resistance, the 14 resistance, be connected to the in-phase input end of described the first comparator and pass through described the 15 grounding through resistance, described the 3rd electric capacity is in parallel with the 15 resistance, one operating voltage is successively by described the 16 resistance, the 17 resistance, be connected to the inverting input of described the second comparator and pass through described the 18 grounding through resistance, described the 4th electric capacity is in parallel with the 18 resistance.
Described the 14 resistance and the 17 resistance are variable resistor.
Described signal generator circuit further comprises inspection stream unit, described inspection stream unit comprises inspection leakage resistance and inspection flow module, described external load is connected to power component again by inspection leakage resistance ground connection, and by this power component adjustment, the electric current by external load is constant current to described inspection flow module.
Described power component is mos field effect transistor or bipolar transistor.
Compared with prior art; signal generator circuit of the present invention; thereby can cut off output when its output overvoltage or external load open circuit and effectively protect external load; thereby and cut off output and effectively protect this signal generator circuit to reach the working power to its power supply when external load short circuits; and continue to be locked in this guard mode; until fault is got rid of rear and the release button that closes, just recover normal operation.
The accompanying drawing explanation
Fig. 1 is the structured flowchart of the signal generator circuit that provides of one embodiment of the invention.
Fig. 2 is the electrical block diagram of the signal generator circuit in Fig. 1.
The main element symbol description
| |
100 |
| |
200 |
| |
210 |
| The |
220 |
| Monitoring means | 10 |
| |
20 |
| The self- |
30 |
| The NAND |
32 |
| |
34 |
| |
36 |
| |
40 |
| |
50 |
| The |
52 |
| Electric capacity | C21、C22、C41、C42 |
| Diode | D31、D32、D41 |
| Light-emitting diode | D71 |
| Button | K41 |
| Resistance | R11、R112、R113、R114、R122、R123、R124、R211、R212、R213、R221、R222、R223、R31、R41、R42、R43、R44、R80 |
| Triode | T31、T51、T71 |
| Amplifier | U11、U12、2U13 |
| Comparator | U21、U22 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1; the signal generator circuit 100 that one embodiment of the invention provides detects and provides signal, this signal generator circuit 100 to comprise monitoring means 10, comparator unit 20, self-lock protection unit 30, power component 40 and inspection stream unit 50 in order to the energising to external load 200.Described external load 200 has first end 210 and the second end 220.Described monitoring means 10 is connected with the second end 220 with the first end 210 of external load 200 respectively, for monitoring the real-time terminal voltage V1 of external load 200, and this terminal voltage V1 is fed back to described comparator unit 20.In the present embodiment, described external load 200 is some light-emitting diodes to be measured (LED).
Please consult Fig. 2, above-mentioned monitoring means 10 comprises amplifier U11, amplifier U12, amplifier U13 simultaneously, and resistance R 11, resistance R 112, resistance R 113, resistance R 114, resistance R 122, resistance R 123, resistance R 124.In described monitoring means 10, the in-phase input end of described amplifier U11 is connected to the first end 210 of described external load 200, and the inverting input of this amplifier U11 is connected to the output of this amplifier U11 and is connected with the inverting input of described amplifier U12 by resistance R 11 by resistance R 112.The output of this amplifier U11 is connected to the in-phase input end of described amplifier U13 and is connected to described resistance R 114 ground connection again by this resistance R 113 by described resistance R 113.The in-phase input end of described amplifier U12 is connected to the second end 220 of described external load 200.The inverting input of this amplifier U12 is connected to the output of this amplifier U12 by described resistance R 122.The output of this amplifier U12 is connected with the inverting input of described amplifier U13 by resistance R 123.The inverting input of described amplifier U13 is connected with the output of this amplifier U13 by described resistance R 124.The output of this amplifier U13 is connected with described comparator unit 20.The output of this amplifier U13 is connected with described self-lock protection unit 30.
Above-mentioned comparator unit 20 comprises comparator U21, comparator U22, resistance R 211, resistance R 212, resistance R 213, resistance R 221, resistance R 222, resistance R 223 and capacitor C 21, capacitor C 22, described resistance R 211, resistance R 212 and resistance R 213 and capacitor C 21 are in order to set a contrast upper voltage limit V2, described resistance R 221, resistance R 222 and resistance R 223 and capacitor C 22 are in order to set a contrast lower voltage limit V3, and contrast upper voltage limit V2 numerically is greater than contrast lower voltage limit V3.Understandably, according to the performance parameter of different product, can draw the numerical value of described contrast upper voltage limit V2, contrast lower voltage limit V3 through calculating, rationally reckoning or limited number of time experiment.Provide an operating voltage VDD successively by described resistance R 211, resistance R 212, be connected to the in-phase input end of described comparator U21 also by described resistance R 213 ground connection.Described capacitor C 21 is in parallel with resistance R 213.Provide an operating voltage VDD successively by described resistance R 221, resistance R 222, be connected to the inverting input of described comparator U22 also by described resistance R 223 ground connection.Described capacitor C 22 is in parallel with resistance R 223.Understandably, described resistance R 212 is variable resistor with resistance R 222, contrasts the numerical value of upper voltage limit V2 and contrast lower voltage limit V3 in order to corresponding adjustment according to actual needs.The normal phase input end of the inverting input of described comparator U21, comparator U22 is connected with the output of the amplifier U13 of described monitoring means 10 respectively.The output of the output of described comparator U21, comparator U22 is connected with described self-lock protection unit 30 respectively.
Above-mentioned self-lock protection unit 30 comprises NAND Logic module 32, protection module 34, triode T51 and alarm module 36.Described NAND Logic module 32 comprises diode D31, diode D32, resistance R 31 and triode T31.In the present embodiment, described triode T31 is NPN type triode, in order to play the effect of switch.The negative pole of described diode D31 is connected with the output of the comparator U21 of described comparator unit 20.The negative pole of described diode D32 is connected with the output of the comparator U22 of described comparator unit 20.The positive pole of described diode D31 is connected with the base stage of described triode T31 and by described resistance R 31 ground connection.The positive pole of described diode D32 is connected with the base stage of described triode T31 and by described resistance R 31 ground connection.The grounded emitter of described triode T31.The collector electrode of described triode T31 is connected with described protection module 34.
Above-mentioned protection module 34 comprises resistance R 41, resistance R 42, resistance R 43, resistance R 44, capacitor C 41, capacitor C 42, button K41 and diode D41.Provide an operating voltage VDD to be connected with the described base stage with triode T51 by described resistance R 41.Provide a negative voltage VEE to be connected with the base stage of triode T51 by described resistance R 44.The positive pole of described diode D41 is connected with the base stage of triode T51.The negative pole of this diode D41 is connected with the output of the amplifier U13 of monitoring means 10 by described resistance R 42.Described button K41 is in normally open, one end ground connection, and the other end is connected with the output of amplifier U13 by described resistance R 43.Described capacitor C 41 is in parallel with button K41.Described capacitor C 42 is in parallel with described resistance R 44.
Described NAND Logic module 32, protection module 34 all are connected with power component 40 by described triode T51.In the present embodiment, described triode T51 is NPN type triode, in order to play the effect of switch.The base stage of this triode T51 is connected with protection module 34 and is connected with the collector electrode of the triode T31 of described NAND Logic module 32.The grounded emitter of this triode T51.
Above-mentioned alarm module 36 comprises light-emitting diode D71 and triode T71.Provide an operating voltage VCC to be connected with the positive pole of described light-emitting diode D71.In the present embodiment, described triode T71 is NPN type triode, in order to play the effect of switch.The base stage of this triode T71 is connected with protection module 34 and is connected with the collector electrode of the triode T31 of described NAND Logic module 32.The grounded emitter of this triode T71.The collector electrode of this triode T71 is connected with the negative pole of described light-emitting diode D71.
Above-mentioned power component 40 may be selected to be the MOSFET(mos field effect transistor) or bipolar transistor.In the present embodiment, this power component 40 is MOSFET.The second end 220 of described external load 200 extremely is connected with the D of power component 40.The S utmost point ground connection of this power component 40.The collector electrode of described triode T51 extremely is connected with the G of this power component 40.When triode T51 conducting, these power component 40 cut-offs, and cut off described signal generator circuit 100.When triode T51 ends, described external load 200 is connected with inspection stream unit 50 by power component 40, described signal generator circuit 100 normal operations.
Above-mentioned inspection stream unit 50 comprises resistance R 80 and inspection flow module 52.This inspection stream unit 50 is constant current in order to the electric current of adjusting by described external load 200.Described external load 200 is connected to power component 40 again by these resistance R 80 ground connection, and the electric current that described inspection flow module 52 is adjusted by external load 200 by this power component 40 is constant current.
In use, the terminal voltage V1 of described monitoring means 10 Real-Time Monitoring external loads 200 also feeds back to comparator unit 20 to signal generator circuit 100 of the present invention.For terminal voltage V1, contrast upper voltage limit V2 and contrast lower voltage limit V3, described comparator unit 20 there will be following three kinds of situations at work: (1). as V2 > and V1 > during V3, the equal output logic high level of the comparator U21 of described comparator unit 20, comparator U22, therefore output logic low level after the NAND Logic module 32 of described self-lock protection unit 30, now described triode T51 cut-off, thereby can not affect the control end voltage of power component 40, described signal generator circuit 100 normal operations; (2). as V1 > during V2, comparator U21 output logic low level, comparator U22 output logic high level, therefore output logic high level after described NAND Logic module 32, now described triode T51 conducting, cut-off occurs and cuts off described signal generator circuit 100 in described power component 40 then; (3). when V1<V3, comparator U21 output logic high level, comparator U22 output logic low level, therefore output logic high level after NAND Logic module 32, now described triode T51 conducting, cut-off occurs and cuts off described signal generator circuit 100 in described power component 40 then.In addition; when described triode T51 conducting; the light-emitting diode D71 Chang Liang of described alarm module 36; with indicating fault status; and the effect due to self-lock protection unit 30; even if terminal voltage V1 numerically is returned to again, contrast between upper voltage limit V2 and contrast lower voltage limit V3, triode T51, still in conducting state, continues cut-off and cuts off described signal generator circuit 100 thereby control the lasting often bright and power component 40 of light-emitting diode D71.After the fault of external load 200 is got rid of (as the LED to be measured that changes short circuit or open circuit); the button K41 that closes again makes its short circuit; dividing potential drop effect due to described resistance R 43; it is normal that terminal voltage V1 recovers; meet V2 > V1 > during the V3 condition; the equal output logic high level of the comparator U21 of comparator unit 20, comparator U22 now; triode T31 conducting; now triode T51 cut-off; self-lock protection unit 30 exits lock-out state; triode T71 cut-off simultaneously, light-emitting diode D71 extinguishes, and described signal generator circuit 100 recovers normal operation.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change and distortion all should belong to the protection range of the claims in the present invention.
Claims (10)
1. a signal generator circuit, detect test signal is provided in order to the energising to external load, it is characterized in that: this signal generator circuit comprises monitoring means, comparator unit, self-lock protection unit and power component, described monitoring means is in order to the terminal voltage of monitoring external load and terminal voltage is fed back to comparator unit, described comparator unit comprises that the first comparator is set the contrast upper voltage limit and the second comparator is set the contrast lower voltage limit, described the first comparator is in order to compare terminal voltage and contrast upper voltage limit, described the second device is in order to compare terminal voltage and contrast lower voltage limit, the output of described the first comparator and the second comparator is connected with the self-lock protection unit respectively, this self-lock protection unit carries out the logic level judgement to the first comparator and second comparator of comparator unit, when when fault occurs, terminal voltage numerically is greater than the contrast upper voltage limit or is less than the contrast lower voltage limit, the described power component of described self-lock protection unit controls enters cut-off state to stop providing electric energy to external load, and continue to be locked in this state, described self-lock protection unit also comprises the release button, fault is pressed the release button after getting rid of, described signal generator circuit is controlled external load restoration energising.
2. signal generator circuit as claimed in claim 1, it is characterized in that: described self-lock protection unit comprises the NAND Logic module, protection module and the first triode, described NAND Logic module comprises the first diode, the second diode, the first resistance and the second triode, the negative pole of this first diode is connected to the output of the first comparator of comparator unit, the negative pole of this first diode is connected to the output of the first comparator of comparator unit, the positive pole of this first diode is connected to the base stage of the second triode, the negative pole of this second diode is connected to the output of the second comparator of comparator unit, the positive pole of this second diode is connected to the base stage of the second triode, the grounded emitter of this second triode, the collector electrode of this second triode is connected to the base stage of described the first triode and is connected to described protection module, the grounded emitter of this triode, the collector electrode of this first triode is connected to described power component.
3. signal generator circuit as claimed in claim 2, it is characterized in that: described protection module comprises the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and the 3rd diode, one operating voltage is connected with the base stage of described the first triode by described the second resistance, one negative voltage is connected with the base stage of the first triode by described the 3rd resistance, the positive pole of described the 3rd diode is connected with the base stage of the first triode, the negative pole of the 3rd diode is connected with the output of monitoring means by described the 4th resistance, described the first electric capacity is in parallel with described the 3rd resistance.
4. signal generator circuit as claimed in claim 3; it is characterized in that: described protection module also comprises the 5th resistance and the second electric capacity be connected with the release button; described release button is in normally open; one end ground connection; the other end is connected with the output of monitoring means by described the 5th resistance, and described the second electric capacity is in parallel with this release button.
5. signal generator circuit as claimed in claim 2; it is characterized in that: described self-lock protection unit also comprises alarm module; described alarm module comprises light-emitting diode and the 3rd triode; one operating voltage is connected with the positive pole of described light-emitting diode; the base stage of described the 3rd triode is connected with protection module and is connected with the collector electrode of described the second triode; the grounded emitter of the 3rd triode, the collector electrode of the 3rd triode is connected with the negative pole of described light-emitting diode.
6. signal generator circuit as claimed in claim 1, it is characterized in that: described monitoring means comprises the first amplifier, the second amplifier, the 3rd amplifier, and the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the in-phase input end of described the first amplifier is connected to an end of described external load, the inverting input of this first amplifier is connected to the output of this first amplifier and is connected with the inverting input of described the second amplifier by the 6th resistance by the 7th resistance, the output of this first amplifier is connected to the in-phase input end of described the 3rd amplifier and is connected to described the 9th resistance ground connection again by this resistance the 8th resistance by described the 8th resistance, the in-phase input end of described the second amplifier is connected to the other end of described external load, the inverting input of this second amplifier is connected to the output of this second amplifier by described the tenth resistance, the output of this second amplifier is connected with the inverting input of described the 3rd amplifier by the 11 resistance, the inverting input of described the 3rd amplifier is connected with the output of the 3rd amplifier by described the 12 resistance, the output of the 3rd amplifier is connected with the inverting input of described the first comparator, the output of the 3rd amplifier is connected with the in-phase input end of described the second comparator.
7. signal generator circuit as claimed in claim 6, it is characterized in that: described comparator unit also comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and the 3rd electric capacity, the 4th electric capacity, described the 13 resistance, the 14 resistance and the 15 resistance and the 3rd electric capacity are in order to set a contrast upper voltage limit, described the 16 resistance, the 17 resistance and the 18 resistance and the 4th electric capacity are in order to set a contrast lower voltage limit, one operating voltage is successively by described the 13 resistance, the 14 resistance, be connected to the in-phase input end of described the first comparator and pass through described the 15 grounding through resistance, described the 3rd electric capacity is in parallel with the 15 resistance, one operating voltage is successively by described the 16 resistance, the 17 resistance, be connected to the inverting input of described the second comparator and pass through described the 18 grounding through resistance, described the 4th electric capacity is in parallel with the 18 resistance.
8. signal generator circuit as claimed in claim 7, it is characterized in that: described the 14 resistance and the 17 resistance are variable resistor.
9. signal generator circuit as claimed in claim 1, it is characterized in that: described signal generator circuit further comprises inspection stream unit, described inspection stream unit comprises inspection leakage resistance and inspection flow module, described external load is connected to power component again by inspection leakage resistance ground connection, and by this power component adjustment, the electric current by external load is constant current to described inspection flow module.
10. signal generator circuit as claimed in claim 1, it is characterized in that: described power component is mos field effect transistor or bipolar transistor.
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| CN201310341445.1A CN103427810B (en) | 2013-08-07 | 2013-08-07 | Signal generator circuit |
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| CN113241724A (en) * | 2021-04-25 | 2021-08-10 | 上海空间电源研究所 | Load power supply overcurrent self-locking and unlocking circuit and method for satellite |
| CN113381377A (en) * | 2020-09-26 | 2021-09-10 | 上海桥翼电子科技有限公司 | Massage armchair load short-circuit protection circuit |
| CN117460122A (en) * | 2023-12-21 | 2024-01-26 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
| CN117460122B (en) * | 2023-12-21 | 2024-04-30 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
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| CN107656218A (en) * | 2017-11-06 | 2018-02-02 | 湖北汽车工业学院 | Induction heating power failure detects in real time and processing system |
| CN113381377A (en) * | 2020-09-26 | 2021-09-10 | 上海桥翼电子科技有限公司 | Massage armchair load short-circuit protection circuit |
| CN113241724A (en) * | 2021-04-25 | 2021-08-10 | 上海空间电源研究所 | Load power supply overcurrent self-locking and unlocking circuit and method for satellite |
| CN117460122A (en) * | 2023-12-21 | 2024-01-26 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
| CN117460122B (en) * | 2023-12-21 | 2024-04-30 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
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| CN103427810B (en) | 2016-06-08 |
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