CN210136818U - Vehicle-mounted relay energy-saving control circuit with voltage protection - Google Patents
Vehicle-mounted relay energy-saving control circuit with voltage protection Download PDFInfo
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- CN210136818U CN210136818U CN201921305894.XU CN201921305894U CN210136818U CN 210136818 U CN210136818 U CN 210136818U CN 201921305894 U CN201921305894 U CN 201921305894U CN 210136818 U CN210136818 U CN 210136818U
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Abstract
The utility model discloses a take voltage protection's on-vehicle relay energy-saving control circuit contains voltage protection circuit, energy-saving control circuit and on-vehicle relay drive circuit. The method has the advantages that the voltage of a coil of the relay is stabilized under the condition that the external wide voltage range is input into a power supply, the minimum pull-in voltage and the minimum holding voltage are respectively provided in a pull-in stage and a holding stage according to the characteristics of the relay, the power consumption of the coil is stabilized, and the minimum power consumption of the coil is ensured under the condition that the external voltage changes through feedback closed-loop control. Meanwhile, a voltage protection circuit is arranged, so that the coil is ensured to work in a normal working voltage range, and the relay coil is effectively protected from being influenced or damaged under the conditions of high voltage and low voltage.
Description
Technical Field
The utility model belongs to the technical field of electric automobile power and switch, in particular to on-vehicle relay energy-saving control circuit has been related to.
Background
With the increasing energy crisis and environmental pollution, the development of high-efficiency, energy-saving and zero-emission clean electric vehicles becomes a necessary trend for the development of the automobile industry at home and abroad. Along with the requirement of the national standard GB/T18384.3-2015 on personnel electric shock protection, the stability and reliability of internal switching devices of the electric automobile and the performance of energy conservation and consumption reduction become important influence links influencing the whole automobile performance of the electric automobile.
The electric automobile has more high-power and high-power consumption load devices due to the complexity of the internal working environment, so that the bearing load capacity of the internal low-voltage power supply system is tested. Besides providing the power of the whole electric vehicle, the battery pack of the electric vehicle also provides power output for the electric control of the whole vehicle, so that the energy consumption of an electric control load is wasted, the loss of the electric energy of the battery is directly caused, and the cruising ability of the battery pack is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the above-mentioned background art mentioned, the utility model provides a take voltage protection's on-vehicle relay energy-saving control circuit.
In order to realize the technical purpose, the utility model discloses a technical scheme does:
the utility model provides a take voltage protection's on-vehicle relay energy-saving control circuit which characterized in that:
the energy-saving control circuit comprises a voltage protection circuit, an energy-saving control circuit and a vehicle-mounted relay drive circuit;
the voltage protection circuit comprises an undervoltage protection circuit and an overvoltage protection circuit; the undervoltage protection circuit comprises a first voltage stabilizing diode, a first triode, a second triode and first to fifth resistors, wherein the first triode is an NPN triode, the second triode is a PNP triode, the cathode of the first voltage stabilizing diode is connected with an external wide-range voltage Vin, the anode of the first voltage stabilizing diode is connected with the base electrode of the first triode through the first resistor, the base electrode of the first triode is connected with the emitting electrode of the first triode through the second resistor, the emitting electrode of the first triode is grounded, the collector electrode of the first triode is connected with the base electrode of the second triode through the third resistor, the base electrode of the second triode is connected with the emitting electrode of the second triode through the fourth resistor, the emitting electrode of the second triode is connected with a driving level, and the collector electrode of the second triode is connected with the output end of the whole voltage protection circuit through the fifth resistor; the overvoltage protection circuit comprises a second voltage stabilizing diode, a third triode and sixth to eighth resistors, the third triode is an NPN triode, the cathode of the second voltage stabilizing diode is connected with an external wide-range voltage Vin, the anode of the second voltage stabilizing diode is connected with the base electrode of the third triode through the sixth resistor, the base electrode of the third triode is connected with the emitting electrode of the third triode through a seventh resistor, the collector electrode of the third triode is connected with the output end of the whole voltage protection circuit, the emitting electrode of the third triode is connected with the output end of the whole voltage protection circuit through the eighth resistor, and the emitting electrode of the third triode is grounded; when the external wide-range voltage Vin is lower than the set undervoltage threshold value, the first voltage stabilizing diode, the first triode and the second triode are cut off, meanwhile, the second voltage stabilizing diode and the third triode are cut off, and at the moment, the output signal of the voltage protection circuit is in a low level due to the fact that the eighth resistor is pulled down; when the external wide-range voltage Vin is higher than the set overvoltage threshold, the first voltage-stabilizing diode, the first triode and the second triode are conducted, meanwhile, the second voltage-stabilizing diode and the third triode are conducted, and at the moment, an output signal of the voltage protection circuit is in a low level; when the external wide-range voltage Vin is in a normal range, the first voltage-stabilizing diode, the first triode and the second triode are conducted, meanwhile, the second voltage-stabilizing diode and the third triode are cut off, and at the moment, an output signal of the voltage protection circuit is in a high level due to the pull-up of the fifth resistor;
the vehicle-mounted relay driving circuit comprises a vehicle-mounted relay coil, an NMOS (N-channel metal oxide semiconductor) tube and a ninth resistor, wherein one end of the vehicle-mounted relay coil is connected with an external wide-range voltage Vin, the other end of the vehicle-mounted relay coil is connected with a drain electrode of the NMOS tube, and a source electrode of the NMOS tube is grounded through the ninth resistor;
the energy-saving control circuit comprises an IC control chip, wherein the IC control chip adopts a PWM chopping output mode, receives an output signal of a voltage protection circuit and transmits a driving signal to a grid electrode of the NMOS tube, when the output signal of the voltage protection circuit is at a low level, the IC control chip blocks the PWM chopping output driving signal, and when the output signal of the voltage protection circuit is at a high level, the IC control chip triggers the PWM chopping output driving signal; and the energy-saving control circuit receives the load current sampled by the ninth resistor to form a feedback loop so as to form closed-loop control.
Further, the working phase of the vehicle-mounted relay comprises a pull-in phase and a holding phase, and a peripheral circuit is established for the IC control chip to configure pull-in time, minimum pull-in current, minimum holding current and switching frequency of the driving signal.
Further, the model of the IC control chip is DRV110 APWR; the EN pin of the IC control chip is connected with the output end of the voltage protection circuit; a SENSE pin of the IC control chip is connected with a ninth resistor and used for collecting actual load current; a KEEP pin of the IC control chip is grounded through a first capacitor, a constant current source is integrated in the pin and continuously charges the first capacitor, and the pull-in time is determined by configuring the charging time of the first capacitor; the PEAK pin of the IC control chip is grounded through a tenth resistor, the internal part of the pin is output by a constant current source and is used for configuring the minimum attracting current, and the minimum attracting current is compared with a signal acquired by a SENSE pin to determine the duty ratio of PWM output in the attracting stage; a HOLD pin of the IC control chip is grounded through an eleventh resistor, constant current source output is arranged inside the HOLD pin and used for configuring minimum holding current, the minimum holding current is compared with a signal acquired by a SENSE pin, and the duty ratio of PWM output in a holding stage is determined; an OSC pin of the IC control chip is grounded through a twelfth resistor, and an oscillator circuit is arranged inside the OSC pin and used for configuring the switching frequency of a driving signal; and an OUT pin of the IC control chip is connected with a grid electrode of the NMOS tube and is used for outputting a driving signal.
The power supply conversion circuit comprises a voltage stabilizing chip, a fourth triode, a third capacitor, a fourth capacitor and thirteenth to fifteenth resistors, wherein the fourth capacitor is an electrolytic capacitor; the collector and the base of a fourth triode are respectively connected with the two ends of a thirteenth resistor, the base and the system ground of the fourth triode are respectively connected with the two ends of a third capacitor, one end of a fourteenth capacitor is connected with the emitter of the fourth triode, the other end of the fourteenth capacitor is connected with the system ground through a fifteenth capacitor, the anode of the fourth capacitor is connected with the emitter of the fourth triode, the cathode of the fourth capacitor is connected with the system ground, the cathode pin of a voltage stabilizing chip is connected with the base of the fourth triode, the anode pin of the voltage stabilizing chip is connected with the system ground, the output pin of the voltage stabilizing chip is connected with the common end of the fourteenth capacitor and the fifteenth capacitor, the collector of the fourth triode is connected with the input end of the whole power conversion circuit and is used for accessing an external wide-range voltage Vin, the emitter of the fourth triode is connected with the output end of the whole power conversion circuit and is used for outputting a stable low voltage Vcc which is used for providing working voltage for the energy The drive level.
Further, the vehicle-mounted relay driving circuit further comprises a third voltage stabilizing diode, a fifth capacitor, a sixteenth resistor and a seventeenth resistor, wherein the fifth capacitor is an electrolytic capacitor; the anode of the third voltage stabilizing diode is connected with the drain electrode of the NMOS tube, the cathode of the third voltage stabilizing diode is connected with the external wide range voltage Vin, the anode of the fifth capacitor is connected with the external wide range voltage Vin, the cathode of the fifth capacitor is grounded, two ends of the seventeenth resistor are respectively connected with the grid electrode and the source electrode of the NMOS tube, and the grid electrode of the NMOS tube is connected with the driving signal output end of the IC control chip through the sixteenth resistor.
Adopt the beneficial effect that above-mentioned technical scheme brought:
the utility model can realize the stable constant power work of the high-voltage relay in the wide voltage input range, the low power at the moment of attracting, and the low power consumption of the device is kept, thereby achieving the purposes of saving energy and working of the high-voltage relay and reducing the pressure of the load of the battery pack; and simultaneously, the utility model discloses have voltage protection function, improved on-vehicle electrical system's reliability.
Drawings
Fig. 1 is an overall circuit diagram of the present invention;
FIG. 2 is a circuit diagram of the energy saving control circuit of the present invention;
FIG. 3 is a circuit diagram of the power conversion circuit of the present invention;
fig. 4 is the driving circuit diagram of the vehicle-mounted relay in the utility model.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the utility model provides a take voltage protection's on-vehicle relay energy-saving control circuit contains voltage protection circuit, energy-saving control circuit and on-vehicle relay drive circuit.
The voltage protection circuit comprises an undervoltage protection circuit and an overvoltage protection circuit. The undervoltage protection circuit comprises a first voltage stabilizing diode D1, a first triode Q1, a second triode Q2 and first to fifth resistors R1-R5, wherein the first triode is an NPN triode, the second triode is a PNP triode, the cathode of the first voltage stabilizing diode is connected with an external wide-range voltage Vin, the anode of the first voltage stabilizing diode is connected with the base electrode of the first triode through a first resistor, the base electrode of the first triode is connected with the emitting electrode of the first triode through a second resistor, the emitting electrode of the first triode is grounded, the collecting electrode of the first triode is connected with the base electrode of the second triode through a third resistor, the base electrode of the second triode is connected with the emitting electrode of the second triode through a fourth resistor, the emitting electrode of the second triode is connected with a driving level, and the collecting electrode of the second triode is connected with the output end of the whole voltage protection circuit through the fifth resistor. The overvoltage protection circuit comprises a second voltage-stabilizing diode D2, a third triode Q3 and sixth-eighth resistors R6-R8, the third triode is an NPN triode, the cathode of the second voltage-stabilizing diode is connected with an external wide-range voltage Vin, the anode of the second voltage-stabilizing diode is connected with the base electrode of the third triode through the sixth resistor, the base electrode of the third triode is connected with the emitting electrode of the third triode through a seventh resistor, the collector electrode of the third triode is connected with the output end of the whole voltage protection circuit, the emitting electrode of the third triode is connected with the output end of the whole voltage protection circuit through the eighth resistor, and the emitting electrode of the third triode is grounded.
When the external wide-range voltage Vin is lower than the set undervoltage threshold value, the first voltage stabilizing diode, the first triode and the second triode are cut off, meanwhile, the second voltage stabilizing diode and the third triode are cut off, and at the moment, the output signal of the voltage protection circuit is in a low level due to the fact that the eighth resistor is pulled down; when the external wide-range voltage Vin is higher than the set overvoltage threshold, the first voltage-stabilizing diode, the first triode and the second triode are conducted, meanwhile, the second voltage-stabilizing diode and the third triode are conducted, and at the moment, an output signal of the voltage protection circuit is in a low level; when the external wide-range voltage Vin is in a normal range, the first voltage stabilizing diode, the first triode and the second triode are conducted, meanwhile, the second voltage stabilizing diode and the third triode are cut off, and at the moment, an output signal of the voltage protection circuit is in a high level due to the fact that the fifth resistor is pulled up.
The vehicle-mounted relay driving circuit comprises a vehicle-mounted relay coil, an NMOS tube Q4 and a ninth resistor R9, one end of the vehicle-mounted relay coil is connected to an external wide-range voltage Vin, the other end of the vehicle-mounted relay coil is connected with a drain electrode of the NMOS tube Q4, and a source electrode of the NMOS tube Q4 is grounded through the ninth resistor R9.
The energy-saving control circuit comprises an IC control chip, wherein the IC control chip adopts a PWM chopping output mode, receives an output signal of a voltage protection circuit and transmits a driving signal to a grid electrode of the NMOS tube, when the output signal of the voltage protection circuit is at a low level, the IC control chip blocks the PWM chopping output driving signal, and when the output signal of the voltage protection circuit is at a high level, the IC control chip triggers the PWM chopping output driving signal; and the energy-saving control circuit receives the load current sampled by the ninth resistor to form a feedback loop so as to form closed-loop control.
The utility model discloses a Pulse Width Modulation (PWM) chopping output mode, its advantage lies in, with the wide range voltage of input relay coil through the closed loop control mode, exports constant voltage to reach stable power's purpose. The output constant voltage is divided into constant pull-in voltage and constant holding voltage, because the relay coil is power-boosted in the pull-in moment, and needs higher pull-in voltage to trigger, after the transient process is finished, only the lower voltage holding coil is needed to pull in. I.e., the holding voltage is less than the pull-in voltage. According to the principle, relevant parameters of the energy-saving control circuit need to be configured to meet the control requirement. The load current is determined by collecting the voltage value flowing through the resistor R9 to form a feedback loop, thereby forming closed-loop control and enabling the actual output current to be consistent with the configured pull-in current and the holding current.
And the peripheral circuits of the IC control chip are configured to configure relevant parameters of the energy-saving control circuit. In this embodiment, the IC control chip is a DRV110APWR chip, and the peripheral circuit thereof is shown in fig. 2. The EN pin of the IC control chip U2 is connected with the output end of the voltage protection circuit. The SENCE pin of the IC control chip U2 is connected to a ninth resistor for collecting the actual load current. The KEEP pin of the IC control chip U2 is grounded through a first capacitor C1, a constant current source is integrated in the pin and continuously charges the first capacitor, and the pull-in time is determined by configuring the charging time of the first capacitor. The PEAK pin of the IC control chip U2 is grounded through a tenth resistor R10, the internal part of the pin is output by a constant current source and is used for configuring the minimum pull-in current, and the minimum pull-in current is compared with a signal acquired by a SENSE pin to determine the duty ratio of PWM output in the pull-in stage and ensure the minimum power in the pull-in state. The HOLD pin of the IC control chip U2 is grounded via an eleventh resistor R11, and the pin is internally output by a constant current source for configuring a minimum holding current, and is compared with a signal collected by a sense pin to determine a duty ratio of PWM output in a holding stage, thereby ensuring minimum power in a holding state. The OSC pin of the IC control chip U2 is grounded through a twelfth resistor R12, and an oscillator circuit is provided inside the OSC pin for configuring the switching frequency of the driving signal. The OUT pin of the IC control chip U2 is connected with the grid electrode of the NMOS tube and used for outputting a driving signal.
As shown in fig. 3, the present invention further includes a power conversion circuit, the power conversion circuit includes a voltage stabilizing chip U1, a fourth triode Q5, a third capacitor C3, a fourth capacitor C4, and thirteenth to fifteenth resistors R13 to R15, and the fourth capacitor is an electrolytic capacitor. The collector and the base of a fourth triode are respectively connected with the two ends of a thirteenth resistor, the base and the system ground of the fourth triode are respectively connected with the two ends of a third capacitor, one end of a fourteenth capacitor is connected with the emitter of the fourth triode, the other end of the fourteenth capacitor is connected with the system ground through a fifteenth capacitor, the anode of the fourth capacitor is connected with the emitter of the fourth triode, the cathode of the fourth capacitor is connected with the system ground, the cathode pin of a voltage stabilizing chip is connected with the base of the fourth triode, the anode pin of the voltage stabilizing chip is connected with the system ground, the output pin of the voltage stabilizing chip is connected with the common end of the fourteenth capacitor and the fifteenth capacitor, the collector of the fourth triode is connected with the input end of the whole power conversion circuit and is used for accessing an external wide-range voltage Vin, the emitter of the fourth triode is connected with the output end of the whole power conversion circuit and is used for outputting a stable low voltage Vcc which is used for providing working voltage for the energy The drive level.
As shown in fig. 4, the vehicle-mounted relay driving circuit further includes a third zener diode D3, a fifth capacitor C5, a sixteenth resistor R16, and a seventeenth resistor R17, and the fifth capacitor C5 is an electrolytic capacitor. The anode of the third zener diode D3 is connected to the drain of the NMOS transistor Q4, the cathode of the third zener diode D3 is connected to the external wide-range voltage Vin, the anode of the fifth capacitor C5 is connected to the external wide-range voltage Vin, the cathode of the fifth capacitor C5 is grounded, two ends of the seventeenth resistor R17 are connected to the gate and the source of the NMOS transistor Q4, and the gate of the NMOS transistor Q4 is connected to the driving signal output terminal of the IC control chip through the sixteenth resistor R16. W1 in fig. 4 is a relay coil.
The embodiment is only for explaining the technical thought of the utility model, can not limit with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.
Claims (5)
1. The utility model provides a take voltage protection's on-vehicle relay energy-saving control circuit which characterized in that:
the energy-saving control circuit comprises a voltage protection circuit, an energy-saving control circuit and a vehicle-mounted relay drive circuit;
the voltage protection circuit comprises an undervoltage protection circuit and an overvoltage protection circuit; the undervoltage protection circuit comprises a first voltage stabilizing diode, a first triode, a second triode and first to fifth resistors, wherein the first triode is an NPN triode, the second triode is a PNP triode, the cathode of the first voltage stabilizing diode is connected with an external wide-range voltage Vin, the anode of the first voltage stabilizing diode is connected with the base electrode of the first triode through the first resistor, the base electrode of the first triode is connected with the emitting electrode of the first triode through the second resistor, the emitting electrode of the first triode is grounded, the collector electrode of the first triode is connected with the base electrode of the second triode through the third resistor, the base electrode of the second triode is connected with the emitting electrode of the second triode through the fourth resistor, the emitting electrode of the second triode is connected with a driving level, and the collector electrode of the second triode is connected with the output end of the whole voltage protection circuit through the fifth resistor; the overvoltage protection circuit comprises a second voltage stabilizing diode, a third triode and sixth to eighth resistors, the third triode is an NPN triode, the cathode of the second voltage stabilizing diode is connected with an external wide-range voltage Vin, the anode of the second voltage stabilizing diode is connected with the base electrode of the third triode through the sixth resistor, the base electrode of the third triode is connected with the emitting electrode of the third triode through a seventh resistor, the collector electrode of the third triode is connected with the output end of the whole voltage protection circuit, the emitting electrode of the third triode is connected with the output end of the whole voltage protection circuit through the eighth resistor, and the emitting electrode of the third triode is grounded; when the external wide-range voltage Vin is lower than the set undervoltage threshold value, the first voltage stabilizing diode, the first triode and the second triode are cut off, meanwhile, the second voltage stabilizing diode and the third triode are cut off, and at the moment, the output signal of the voltage protection circuit is in a low level due to the fact that the eighth resistor is pulled down; when the external wide-range voltage Vin is higher than the set overvoltage threshold, the first voltage-stabilizing diode, the first triode and the second triode are conducted, meanwhile, the second voltage-stabilizing diode and the third triode are conducted, and at the moment, an output signal of the voltage protection circuit is in a low level; when the external wide-range voltage Vin is in a normal range, the first voltage-stabilizing diode, the first triode and the second triode are conducted, meanwhile, the second voltage-stabilizing diode and the third triode are cut off, and at the moment, an output signal of the voltage protection circuit is in a high level due to the pull-up of the fifth resistor;
the vehicle-mounted relay driving circuit comprises a vehicle-mounted relay coil, an NMOS (N-channel metal oxide semiconductor) tube and a ninth resistor, wherein one end of the vehicle-mounted relay coil is connected with an external wide-range voltage Vin, the other end of the vehicle-mounted relay coil is connected with a drain electrode of the NMOS tube, and a source electrode of the NMOS tube is grounded through the ninth resistor;
the energy-saving control circuit comprises an IC control chip, wherein the IC control chip adopts a PWM chopping output mode, receives an output signal of a voltage protection circuit and transmits a driving signal to a grid electrode of the NMOS tube, when the output signal of the voltage protection circuit is at a low level, the IC control chip blocks the PWM chopping output driving signal, and when the output signal of the voltage protection circuit is at a high level, the IC control chip triggers the PWM chopping output driving signal; and the energy-saving control circuit receives the load current sampled by the ninth resistor to form a feedback loop so as to form closed-loop control.
2. The vehicle-mounted relay energy-saving control circuit with voltage protection according to claim 1, characterized in that: the working stage of the vehicle-mounted relay comprises an attraction stage and a holding stage, and a peripheral circuit is established for the IC control chip to configure attraction time, minimum attraction current, minimum holding current and switching frequency of a driving signal.
3. The vehicle-mounted relay energy-saving control circuit with voltage protection according to claim 2, characterized in that: the type of the IC control chip is DRV110 APWR; the EN pin of the IC control chip is connected with the output end of the voltage protection circuit; a SENSE pin of the IC control chip is connected with a ninth resistor and used for collecting actual load current; a KEEP pin of the IC control chip is grounded through a first capacitor, a constant current source is integrated in the pin and continuously charges the first capacitor, and the pull-in time is determined by configuring the charging time of the first capacitor; the PEAK pin of the IC control chip is grounded through a tenth resistor, the internal part of the pin is output by a constant current source and is used for configuring the minimum attracting current, and the minimum attracting current is compared with a signal acquired by a SENSE pin to determine the duty ratio of PWM output in the attracting stage; a HOLD pin of the IC control chip is grounded through an eleventh resistor, constant current source output is arranged inside the HOLD pin and used for configuring minimum holding current, the minimum holding current is compared with a signal acquired by a SENSE pin, and the duty ratio of PWM output in a holding stage is determined; an OSC pin of the IC control chip is grounded through a twelfth resistor, and an oscillator circuit is arranged inside the OSC pin and used for configuring the switching frequency of a driving signal; and an OUT pin of the IC control chip is connected with a grid electrode of the NMOS tube and is used for outputting a driving signal.
4. The vehicle-mounted relay energy-saving control circuit with voltage protection according to claim 1, characterized in that: the power supply conversion circuit comprises a voltage stabilizing chip, a fourth triode, a third capacitor, a fourth capacitor and thirteenth to fifteenth resistors, wherein the fourth capacitor is an electrolytic capacitor; the collector and the base of a fourth triode are respectively connected with the two ends of a thirteenth resistor, the base and the system ground of the fourth triode are respectively connected with the two ends of a third capacitor, one end of a fourteenth capacitor is connected with the emitter of the fourth triode, the other end of the fourteenth capacitor is connected with the system ground through a fifteenth capacitor, the anode of the fourth capacitor is connected with the emitter of the fourth triode, the cathode of the fourth capacitor is connected with the system ground, the cathode pin of a voltage stabilizing chip is connected with the base of the fourth triode, the anode pin of the voltage stabilizing chip is connected with the system ground, the output pin of the voltage stabilizing chip is connected with the common end of the fourteenth capacitor and the fifteenth capacitor, the collector of the fourth triode is connected with the input end of the whole power conversion circuit and is used for accessing an external wide-range voltage Vin, the emitter of the fourth triode is connected with the output end of the whole power conversion circuit and is used for outputting a stable low voltage Vcc which is used for providing working voltage for the energy The drive level.
5. The vehicle-mounted relay energy-saving control circuit with voltage protection according to claim 1, characterized in that: the vehicle-mounted relay driving circuit further comprises a third voltage stabilizing diode, a fifth capacitor, a sixteenth resistor and a seventeenth resistor, wherein the fifth capacitor is an electrolytic capacitor; the anode of the third voltage stabilizing diode is connected with the drain electrode of the NMOS tube, the cathode of the third voltage stabilizing diode is connected with the external wide range voltage Vin, the anode of the fifth capacitor is connected with the external wide range voltage Vin, the cathode of the fifth capacitor is grounded, two ends of the seventeenth resistor are respectively connected with the grid electrode and the source electrode of the NMOS tube, and the grid electrode of the NMOS tube is connected with the driving signal output end of the IC control chip through the sixteenth resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921305894.XU CN210136818U (en) | 2019-08-13 | 2019-08-13 | Vehicle-mounted relay energy-saving control circuit with voltage protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921305894.XU CN210136818U (en) | 2019-08-13 | 2019-08-13 | Vehicle-mounted relay energy-saving control circuit with voltage protection |
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| CN210136818U true CN210136818U (en) | 2020-03-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110379676A (en) * | 2019-08-13 | 2019-10-25 | 南京雁展科技有限公司 | A kind of vehicle-mounted relay energy-saving control circuit of protection with voltage |
| CN114641112A (en) * | 2022-05-17 | 2022-06-17 | 西蒙电气（中国）有限公司 | Circuit structure, method and device for realizing smooth dimming of output pulse width feedback based on power supply chopping, processor and storage medium thereof |
| CN116951131A (en) * | 2023-09-20 | 2023-10-27 | 深圳市恒永达科技股份有限公司 | Medical instrument liquid path switch electromagnetic valve and control method |
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2019
- 2019-08-13 CN CN201921305894.XU patent/CN210136818U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110379676A (en) * | 2019-08-13 | 2019-10-25 | 南京雁展科技有限公司 | A kind of vehicle-mounted relay energy-saving control circuit of protection with voltage |
| CN110379676B (en) * | 2019-08-13 | 2024-04-26 | 南京雁展科技有限公司 | Vehicle-mounted relay energy-saving control circuit with voltage protection |
| CN114641112A (en) * | 2022-05-17 | 2022-06-17 | 西蒙电气（中国）有限公司 | Circuit structure, method and device for realizing smooth dimming of output pulse width feedback based on power supply chopping, processor and storage medium thereof |
| CN116951131A (en) * | 2023-09-20 | 2023-10-27 | 深圳市恒永达科技股份有限公司 | Medical instrument liquid path switch electromagnetic valve and control method |
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