KR20140036903A - Apparatus for stabilizing power supply of air suspension controlling actuator - Google Patents

Apparatus for stabilizing power supply of air suspension controlling actuator Download PDF

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Publication number
KR20140036903A
KR20140036903A KR1020120103604A KR20120103604A KR20140036903A KR 20140036903 A KR20140036903 A KR 20140036903A KR 1020120103604 A KR1020120103604 A KR 1020120103604A KR 20120103604 A KR20120103604 A KR 20120103604A KR 20140036903 A KR20140036903 A KR 20140036903A
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KR
South Korea
Prior art keywords
relay
power supply
terminal
switching
actuator
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KR1020120103604A
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Korean (ko)
Inventor
강용진
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현대모비스 주식회사
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Priority to KR1020120103604A priority Critical patent/KR20140036903A/en
Publication of KR20140036903A publication Critical patent/KR20140036903A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • B60G17/0185—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method for failure detection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/80—Detection or control after a system or component failure
    • B60G2800/802—Diagnostics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/15—Failure diagnostics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The present invention makes it possible to diagnose a failure caused by a ground (GND) short circuit at the terminal side supplying power to an air suspension control actuator of a vehicle, and cut off the power supply when a ground (GND) short circuit failure is detected to provide an associated device. Provides a power supply stabilization device for actuators for air suspension control to prevent burnout
To this end, the present invention is a relay switch for switching the state of supplying power supplied from a battery power terminal to the high-side (HS) power supply terminal of the actuator valve for controlling the vehicle air suspension, and the actuator And a power stabilization module operable to sense a failure caused by a ground (GND) short circuit at the valve high-side (HS) side to cut off the power supply.

Figure P1020120103604

Description

Apparatus for Stabilizing Power Supply of Air Suspension Controlling Actuator}

The present invention relates to a power supply stabilization device of the actuator for air suspension control, and more particularly, the power supply terminal of the actuator for controlling the power supply to the air spring pneumatic control solenoid valve of the vehicle axle is ground (GND). The present invention relates to a power supply stabilization device for an air suspension control actuator which enables diagnosis of a failure in the case of a short circuit and prevents burnout of the fuse inside the actuator control ECU and the ECU power supply.

In general, the actuator mounted on the four axes of the vehicle (Front Left, Front Right, Rear Left, Rear Right), the air spring valve for controlling the air pressure of the air spring (Air-Spring), and stores the high pressure compressed air A reservoir valve for controlling the pneumatic pressure of the reservoir tank and an exhaust valve for discharging the compressed air inside the vehicle pneumatic circuit to the outside are provided.

Each of these actuator valves is composed of a solenoid valve that is closed while no current flows and opens only when current flows, and the air-suspension ECU controls the opening and closing of each actuator valve. have.

On the other hand, the high side (HS) power of each actuator valve is designed to be always supplied while the ignition of the vehicle is on without the air suspension system malfunctioning. The presence / absence of supply is designed to be controlled via a relay switch installed in the ECU. In addition, the actuator valves may be controlled through on / off control of switching elements configured on the low side (LS) side of each valve.

1 is a view showing a configuration of a power supply circuit of an actuator valve by a control of a conventional air suspension ECU.

As shown in FIG. 1, in the air suspension ECU, the actuator valve HS terminal is a terminal for supplying power to the respective actuator valves, even though the fuse of the ECU or the ECU power supply is burned out when the ground (GND) is shorted. As with the battery power supply terminal B (+) of the vehicle, no failure is detected in the ground GND short circuit. This is because the power supply circuit is composed of only the relay switch 10 capable of controlling on / off of the reverse voltage preventing diodes D1 and D2 and the actuator power supply on the B (+) input side.

In addition, when a ground (GND) short circuit occurs on the low-side (LS) terminal side of the actuator valve through the control of the relay switch 10, the additional problem that may be caused by the valve is continuously opened, It is designed to prevent this.

Related technologies include Korean Patent Publication No. 2000-0006511 (Suspension Control Device) (2000.01.25).

However, in the case of a power supply circuit of an actuator valve under the control of a conventional air suspension ECU, when a ground (GND) short occurs in the actuator valve high-side (HS) terminal, a diagnosis function for such a short circuit occurrence and The stabilization function is not considered, and if the ground (GND) short circuit occurs while the actuator valve is in operation, the momentary overcurrent may cause the fuse in the ECU or the ECU power supply to burn out and extend to the secondary failure. I have a problem.

Accordingly, the present invention has been made to improve the above-mentioned conventional problems, and it is possible to diagnose a failure due to a ground (GND) short circuit at the terminal side supplying power to the air suspension control actuator of the vehicle, and ground (GND). SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply stabilization device for an actuator for controlling air suspension, which prevents burnout of an associated device by cutting off the power supply when a short circuit failure is detected.

According to an aspect of the present invention, a power supply stabilization device for an air suspension control actuator includes a power supply from a battery power supply terminal to a high-side (HS) power supply terminal of an actuator valve for controlling a vehicle air suspension. A relay switch for switching and controlling a supplying state, and a power stabilization module configured to sense a failure caused by a ground (GND) short circuit at the actuator valve high-side (HS) side and to shut off the power supply. It is characterized by.

In the present invention, the power stabilization module, the relay switching control unit for sensing the over-current by the ground (GND) short-circuit of the actuator valve high-side (HS) power supply terminal, and switching off the relay switch, and the relay A failure prevention unit for maintaining the switched-off state according to ground (GND) short-circuit sensing of the switching control unit, so that the relay switch is not chattered when it is returned to the normal state by short-term maintenance of the failure state; And a fault protection unit for preventing a relay protection unit and a safety monitoring signal for monitoring a ground (GND) short-circuit failure state of the actuator valve high-side (HS) power supply terminal.

In addition, the relay switching controller is connected in series between the switching-on connection terminal of the relay switch and the actuator valve high-side (HS) power supply terminal, the sensing resistor for sensing the overcurrent generated by the ground (GND) short circuit And a control diode having an output terminal connected in parallel between the sensing resistor and a connection terminal of an actuator valve high-side (HS) power supply terminal and an input terminal connected to one end of a relay coil of the relay switch. .

The failure prevention unit inputs a switching transistor in which a base end is connected in parallel between the control diode of the relay switching controller, an emitter end is connected to a relay driving transistor, and a relay control signal from the ECU to the base end. And the collector stage includes a relay driving transistor connected to the emitter stage of the switching transistor.

In one embodiment of the present invention, the relay protection unit includes a first protection transistor having a base end connected in parallel with an emitter end of the relay driving transistor of the failure prevention unit, and a collector end connected to the other end of the relay coil of the relay switch, and the base end being The second protective transistor may be connected in parallel with the emitter terminal of the first protective transistor, and the collector terminal may be connected in parallel with the base terminal of the first protective transistor.

The fault monitoring unit may include a monitoring transistor having a base end connected in parallel between a switching transistor of the fault protection unit and a connection terminal of a relay driving transistor, and a collector end connected in parallel with an output end of a safety monitoring signal, and the safety monitoring signal. It characterized in that it comprises a resistor connected in parallel with the output terminal of.

According to the present invention made as described above, by detecting a state that a fault of the ground (GND) short circuit occurs in the actuator valve high-side (HS) power supply terminal by the relay switch control of the air suspension ECU, By automatically shutting off the supply, it is possible to prevent the internal fuse of the ECU and the fuse of the ECU power supply from being burned out due to the ground (GND) short circuit, and to provide a diagnosis function through monitoring of the failure. It can improve the safety of parts and the convenience of maintenance.

1 is a view showing a configuration of a power supply circuit of an actuator valve by a control of a conventional air suspension ECU.
2 is a view showing the configuration of the power supply stabilization device of the air suspension control actuator according to an embodiment of the present invention.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

2 is a view showing the configuration of the power supply stabilization device of the air suspension control actuator according to an embodiment of the present invention.

As shown in Figure 2, the power supply stabilization device of the air suspension control actuator according to the present invention, the battery power supplied from the battery power supply terminal (B (+)) to the various actuator valves for controlling the vehicle air suspension (that is, , A relay switch 10 for switching and controlling a state of supplying to an air spring valve, a reservoir valve, a discharge valve, and the like, and a ground of an actuator valve high side (HS) connected to a switching connection terminal of the relay switch 10. And a power stabilization module 100 for monitoring a fault condition caused by a (GND) short circuit and automatically shutting off a power supply when the fault occurs.

The relay switch 10 has its switching terminal 14 connected to the battery power terminal B (+) through a reverse voltage prevention diode D1, and its first switching connection terminal 16 stabilizes the power supply. Corresponds to the switching on terminal connected to the actuator valve high-side (HS) power supply terminal via the module 100, the second switching connection terminal 18 of which is parallel to the resistor R1 and the capacitor C3. It corresponds to the switching-off terminal connected to the connection end side.

Here, the relay control high-side (HS) output terminal of the power stabilization module 100 is parallel between the switching terminal 14 of the relay switch 10 and the connection terminal of the battery power terminal B (+). The relay coil 12 is connected to the relay control low-side (LS) output terminal of the power stabilization module 100 via a reverse voltage prevention diode D3.

The power stabilization module 100 has an overcurrent caused by a ground (GND) short circuit in a state in which power is supplied to an actuator valve high-side (HS) power supply terminal side according to the switching on of the relay switch 10. When sensing, the relay switching control unit 20 for switching off and controlling the relay switch 16, and the relay switching control unit 20 to the ground (GND) short circuit failure sensing of the actuator valve high-side (HS) power supply terminal Accordingly, in a state in which the relay switch 10 is automatically switched off, a failure that prevents the relay switch 10 from colliding with a relay control signal for switching on command of the MCU or repeatedly switching on / off is controlled. The protection unit 30 does not chatter the relay switch 10 when the failure state is maintained only for a very short time and then returns to a normal state. Relay protection unit 40 to prevent the fault monitoring unit 50 for generating a safety monitoring signal for externally monitoring the ground (GND) short-circuit failure state of the actuator valve high-side (HS) power supply terminal It includes.

On the other hand, the relay switching control unit 20 is connected in series between the first switching connection terminal 16 that is the switching on terminal of the relay switch 10 and the actuator valve high-side (HS) power supply terminal, the ground A sensing resistor R4 for sensing an overcurrent generated by a (GND) short circuit and an output terminal thereof are connected in parallel between the sensing resistor R4 and a connection terminal of an actuator valve high-side (HS) power supply terminal. The input terminal comprises a control diode D4 connected to one end of the relay control high-side (HS) output terminal via the resistor R5 (ie, one end of the relay coil 12 of the relay switch 10).

According to the relay switching controller 20, when a ground (GND) short circuit occurs in the actuator valve high-side (HS) power supply terminal, a current flowing in the sensing resistor R4 configured in series increases, and the sensing resistor Since the resistance value of R4 is fixed, the voltage value applied to the sensing resistor R4 increases as the current value increases.

In addition, the control diode D4 is turned on when a potential difference of more than a turn-on voltage of the diode occurs at both ends thereof, and a current flows. The current path is formed through the control diode (D4) at a moment greater than the turn-on voltage of the power supply, so that current is applied to the relay coil 12 of the relay switch 10 through the relay control high-side (HS) output terminal. By switching off, the switching terminal 14 of the corresponding relay switch 10 is automatically switched from the first switching connection terminal 16 that is a switching on connection terminal to the second switching connection terminal 18 that is a switching off connection terminal. To be switched off.

In this case, the sensing resistor R4 should select a very low resistance value, for example, 0.01 mA to 0.1 mA in order to minimize the voltage drop of the power supplied to the actuator valve. Choose a resistor that can withstand more than 10W of power.

In addition, the control diode D4 is a turn-on voltage equal to the voltage difference across the sensing resistor R4 for detecting an overcurrent, for example, connecting a single diode having a turn-on voltage of 0.6 V, or a plurality of the diodes in accordance with the turn-on voltage value. Diodes are connected in series.

On the other hand, since the maximum power consumption of the air suspension ECU applied to the present invention is less than 15A (based on the KH application model), if the threshold value of the overcurrent detection is configured to 15A, for control having a turn-on voltage of 0.6V Assuming that the diode D4 is used, the resistance value Rs of the sensing resistor D4 and the power value P_rs capable of withstanding the instantaneous overcurrent are applied according to the following equation (1).

Figure pat00001

According to Equation 1, the resistance value Rs of the sensing resistor D4 may be configured to 0.04 kV, and the power value P_rs for the selected 0.04 kW resistor must be able to withstand power of 9 W or more. .

That is, when a ground (GND) short circuit occurs in the actuator valve high-side (HS) power supply terminal, the fuse inside the ECU or the ECU power supply may be permanently damaged due to a short circuit with the high-side (HS) power line. The instantaneous overcurrent flows due to the extremely low resistance between the ground (GND) lines. In this case, the fuse or the fuse placed in the input power part of the ECU is burned out due to the failure of the device or PCB pattern located on the power line inside the ECU. The moment it enters the circuit, the over current cuts off instead of the ECU.

Therefore, to prevent this, the sensing resistor (R4) and the control diode can be used to protect the ECU internal element and PCB pattern from momentary overcurrent during a ground (GND) short circuit of the actuator valve high-side (HS) power supply terminals. (D4) was prepared.

In addition, in the power stabilization module 100, the failure prevention part 30 is connected in parallel between a resistor R5 of the relay switching controller 20 and a control diode D4 and a base thereof via a resistor R6. Connected to the battery terminal B (+), the emitter terminal of which is connected to the relay driving transistor 34, and the base thereof through the resistor R12. A relay driving signal is inputted to the relay control signal from the ECU, and a collector terminal thereof is connected to an emitter terminal of the switching transistor 32, and an emitter terminal thereof is connected to a ground terminal via a resistor R13 ( 34).

The relay protection part 40 has its base end connected in parallel with the emitter end of the relay driving transistor 34 of the failure prevention part 30 via a resistor R11, and its collector end is connected to the relay control row. A first protective transistor 42 connected to a side (LS) output terminal (i.e., a relay coil 12 of the relay switch 10), and a base end of which emitter of the first protective transistor 42 A second protective transistor 44 connected in parallel with the stage, the collector terminal connected in parallel with the base terminal of the first protective transistor 42, and a resistor R10 connected in parallel with the resistor R11. .

The fault monitoring unit 50 has a base end connected in parallel between the connection terminal of the switching transistor 32 and the relay driving transistor 34 of the fault protection unit 30, and the collector end of which the output end of the safety monitoring signal. And a monitoring transistor 52 connected in parallel with each other, and a resistor R8 connected in parallel with the output terminal of the safety monitoring signal.

Next, the operation of the power supply stabilization device of the air suspension control actuator according to the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, when the relay switch 10 is switched on to supply power from the battery power terminal B (+) to the actuator valve high-side (HS) power supply terminal, the corresponding actuator valve high-side HS In the case where a ground (GND) short is generated at the power supply terminal side, the sensing resistor R4 configured in the relay switching controller 20 of the power stabilization module 100 senses an overcurrent caused by the ground (GND) short. do.

When the voltage value across both ends is increased by the fixed resistance value of the sensing resistor R4, the control diode D4 is equal to or greater than the turn-on voltage of the diode at both ends thereof. When a potential difference occurs, it is turned on and current flows.

At this time, when the potential difference across the sensing resistor R4 becomes greater than the turn-on voltage of the control diode D4, a current path is formed through the control diode D4, and thus the relay control high-side HS. As the application of the current to the relay coil 12 of the relay switch 10 is interrupted through an output terminal, the corresponding relay switch 10 is switched off to the actuator valve high-side (HS) power supply terminal. Make sure the power supply is cut off.

On the other hand, when the current path through the control diode (D4) is formed, the switching transistor 32 constituting the failure prevention unit 30 of the power stabilization module 100 is turned off, the switching transistor 32 According to the turn-off, the relay driving transistor 34 that receives the relay control signal from the ECU through its base end is switched off.

In addition, the monitoring transistor 52 constituting the fault monitoring unit 50 of the power stabilization module 100 has its base end switched to a low level in accordance with the turn-off of the switching transistor 32 and turned off. In addition, the high level safety monitoring signal can be output to the outside.

In addition, the first protection transistor 40 and the second protection transistor 44 constituting the relay protection unit 40 of the power stabilization module 100 are connected at a high level through the relay control low-side (LS) output terminal. The signal is output so that the control of the relay switch 10 is not chattered.

Therefore, when the ground (GND) short circuit failure of the actuator valve high-side (HS) power supply terminal is detected, the power stabilization module 100 automatically switches off the relay switch 10 to cut off the power supply. It prevents fuse damage inside the ECU and ECU power, and outputs a safety monitoring signal to the outside to monitor the fault condition externally.

In addition, in the failure state, even if the MCU generates a relay control signal to turn on the power output, the relay switch 10 is prevented from actually being switched on.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: relay switch 20: relay switching control unit
30: Failure prevention part 40: Relay protection part
50: failure monitoring unit 100: power stabilization module
R4: sensing resistor D4: control diode

Claims (6)

A relay switch for switching and controlling a state of supplying power supplied from a battery power supply terminal to a high-side (HS) power supply terminal of an actuator valve for controlling a vehicle air suspension; And
And a power stabilization module operable to sense a failure due to a ground (GND) short circuit at the actuator valve high-side (HS) side to cut off the power supply of the air suspension control actuator. Stabilization device. The method of claim 1,
The power stabilization module may include: a relay switching controller configured to sense an overcurrent caused by a ground (GND) short circuit of the actuator valve high-side (HS) power supply terminal and to switch off the relay switch;
Failure prevention unit for maintaining the state that the relay switch is switched off in accordance with the ground (GND) short circuit fault sensing of the relay switching control unit,
A relay protection unit which prevents the relay switch from being chattered when returning to a normal state by maintaining the fault state for a short time;
And a failure monitoring unit generating a safety monitoring signal for monitoring a ground (GND) short-circuit failure state of the actuator valve high-side (HS) power supply terminal. 3. The method of claim 2,
The relay switching controller may include a sensing resistor connected in series between the switching on connection terminal of the relay switch and the actuator valve high-side (HS) power supply terminal to sense an overcurrent generated by a ground (GND) short circuit; An air suspension comprising an output terminal connected in parallel between the sensing resistor and a connection terminal of an actuator valve high-side (HS) power supply terminal and an input terminal connected to one end of a relay coil of the relay switch. Power supply stabilization device for control actuator. The method of claim 3, wherein
The failure prevention unit receives a relay control signal from the ECU, a switching transistor having a base end connected in parallel with the control diode of the relay switching control unit, an emitter end connected to a relay driving transistor, and a base end, A power supply stabilization device for an air suspension control actuator, characterized in that the collector stage includes a relay driving transistor connected to the emitter stage of the switching transistor. 5. The method of claim 4,
The relay protection unit may include a first protection transistor having a base end connected in parallel with an emitter end of a relay driving transistor of the failure protection unit, and a collector end connected to the other end of a relay coil of the relay switch, and the base end being used for the first protection. And a second protective transistor connected in parallel with the emitter terminal of the transistor, the collector terminal being connected in parallel with the base terminal of the first protective transistor. 5. The method of claim 4,
The fault monitoring unit includes a monitoring transistor having a base end connected in parallel between a switching transistor of the fault protection unit and a connection terminal of a relay driving transistor, and a collector end connected in parallel with an output end of a safety monitoring signal, and an output end of the safety monitoring signal. And a resistor connected in parallel with the power supply stabilization device for an air suspension control actuator.
KR1020120103604A 2012-09-18 2012-09-18 Apparatus for stabilizing power supply of air suspension controlling actuator KR20140036903A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108183050A (en) * 2018-02-27 2018-06-19 厦门芯阳科技股份有限公司 A kind of high security switch control relay drive circuit
CN111086445A (en) * 2018-10-23 2020-05-01 矢崎总业株式会社 Vehicle power supply circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108183050A (en) * 2018-02-27 2018-06-19 厦门芯阳科技股份有限公司 A kind of high security switch control relay drive circuit
CN108183050B (en) * 2018-02-27 2023-09-05 厦门芯阳科技股份有限公司 High-safety switch control relay driving circuit
CN111086445A (en) * 2018-10-23 2020-05-01 矢崎总业株式会社 Vehicle power supply circuit
CN111086445B (en) * 2018-10-23 2023-02-03 矢崎总业株式会社 Vehicle power supply circuit

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