CN219145678U - High-side overcurrent protection circuit for automobile illumination LED lamp - Google Patents
High-side overcurrent protection circuit for automobile illumination LED lamp Download PDFInfo
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- CN219145678U CN219145678U CN202223252333.2U CN202223252333U CN219145678U CN 219145678 U CN219145678 U CN 219145678U CN 202223252333 U CN202223252333 U CN 202223252333U CN 219145678 U CN219145678 U CN 219145678U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model relates to a high-side overcurrent protection circuit for an automobile lighting LED lamp, which comprises an input filter protection circuit, a low-dropout linear voltage stabilizing circuit, a load RL circuit, a singlechip logic circuit, a high-side overcurrent detection circuit and a control execution circuit, wherein current enters the circuit from a network mark BAT, and is supplied to the low-dropout linear voltage stabilizing circuit through an input voltage VIN of the input filter protection circuit and is supplied to the load RL circuit through the high-side overcurrent detection circuit; the low dropout linear voltage stabilizing circuit converts the input voltage VIN into stable 5V direct current voltage and supplies power to the singlechip logic circuit and the control executing circuit respectively. The LED lamp in the automobile lighting lamp burns out due to overlarge current, and the overcurrent protection point is adjusted according to the actual load condition to prevent the overload from burning out; the high-side overcurrent protection circuit has high response speed, can better protect loads, prevents overcurrent damage, and is safe and reliable.
Description
Technical Field
The utility model relates to a protection circuit, in particular to a high-side overcurrent protection circuit for an automobile lighting LED lamp.
Background
In the past, automotive illumination lamps have been incandescent lamps, halogen lamps, xenon lamps, and the like. However, with the continuous expansion of LEDs in the field of vehicle lamps, every position of an automotive lamp now has a figure of an LED. The gradual rise of LEDs is closely related to its own superior characteristics. For example, compared with the incandescent lamp of the past automobile lighting lamp, the LED has the remarkable advantages of long service life, energy saving, high light quality, simple structure, good shock resistance, high response speed, small applicable voltage, small volume, capability of randomly changing the shape of the lamp, and the like.
The LED is a light emitting diode, and has a characteristic that when the voltage across the LED changes very little, the current changes very much, so that the LED is prevented from being burnt out due to excessive current flowing through the LED, and therefore, overcurrent protection is required for the product.
Disclosure of Invention
Aiming at the problem that an LED lamp in an automobile lighting lamp burns out due to overlarge current, a high-side overcurrent protection circuit for the LED lamp for automobile lighting is provided.
The technical scheme of the utility model is as follows:
the high-side overcurrent protection circuit for the automobile lighting LED lamp comprises an input filter protection circuit, a low-dropout linear voltage stabilizing circuit, a load RL circuit, a singlechip logic circuit, a high-side overcurrent detection circuit and a control execution circuit, wherein current enters the circuit from a network mark BAT, and is respectively supplied to the low-dropout linear voltage stabilizing circuit through an input voltage VIN of the input filter protection circuit, and the high-side overcurrent detection circuit is used for supplying power to the load RL circuit; the low dropout linear voltage stabilizing circuit converts the input voltage VIN into stable 5V direct current voltage and then respectively supplies power to the singlechip logic circuit and the control execution circuit; the high-side overcurrent detection circuit plays a role IN detecting overcurrent and disconnection of the load RL circuit, the singlechip logic circuit transmits an opening detection signal Q2DIN to the high-side overcurrent detection circuit after power is supplied, the high-side overcurrent detection circuit transmits a detection overcurrent signal JCW to the singlechip logic circuit, the singlechip logic circuit transmits a logic signal KZW to the control execution circuit, the control execution circuit feeds back a control signal Q2-IN to the high-side overcurrent detection circuit, and the high-side overcurrent detection circuit switches off the load RL circuit according to the control signal Q2-IN.
The high-side overcurrent detection circuit comprises resistors R1, R4, R5, R7, R9 and R14, capacitors C6 and C8, a transient suppression diode TVS2 and an overcurrent monitoring chip Q1;
the overcurrent monitoring chip Q1 comprises 15 pins 1-15:
the 15 pin is the positive input pin of the power supply, and is accessed to the main circuit by the network mark BAT;
8. the pins 9, 10, 12, 13 and 14 are output pins of the chip, and are respectively connected with GND through the serially connected capacitor C8 and the serially connected load RL circuit after being sequentially connected in parallel;
the 1 pin is GND pin, and is connected with GND through the resistor R1 connected in series;
the pin 2 is an input control pin, the control execution circuit is connected through the resistor R4 connected in series, and the high level is effective, namely when the pin voltage is high level, the overcurrent monitoring chip Q1 is turned on, current enters from the pin 15, and the current flows through the pins 8,9, 10, 12, 13 and 14 to supply power for the rear-stage load RL; when the pin 2 is in a low level, the overcurrent monitoring chip Q1 is turned off, no current is output by pins 8,9, 10, 12, 13 and 14, and the later-stage load does not work;
the 3 pin is an input current detection enabling pin, is connected with the singlechip logic circuit through the resistor R5 connected in series, is set high and effective, namely when the 3 pin is set high, the overcurrent monitoring chip Q1 detects the input current, and otherwise, does not detect the input current;
the 4 pins are current detection pins, and are respectively connected with the singlechip logic circuit and GND through the resistors R7 and R9 which are connected in parallel to realize the monitoring of input current;
5. pins 6,7 and 11 are disconnected;
the capacitor C6 is connected in parallel with two ends of the resistors R7 and R8;
the resistor R14 and the transient suppression diode TVS2 are respectively connected in parallel to two ends of the capacitor C8.
The singlechip logic circuit comprises a singlechip U2, variable resistors B11, B12 and B13 and resistors R36, R37 and R38, wherein the singlechip U2 comprises 16, 17 and 18 pins, and the 16 pin is connected with the 4 pin of the overcurrent monitoring chip Q1 through the variable resistor B11 and the resistor R36 which are sequentially connected in series and is used for receiving a detection overcurrent signal JCW monitored by a current detection pin of the overcurrent monitoring chip Q1; the 17 pin is connected with the 3 pin of the overcurrent monitoring chip Q1 through a variable resistor B12 and a resistor R37 which are sequentially connected in series, and is used for controlling the 3 pin of the overcurrent monitoring chip Q1 to send an opening detection signal Q2DIN; and the 18 pin is connected with the control execution circuit through a variable resistor B13 and a resistor R38 which are sequentially connected IN series and is used for sending a control signal Q2-IN through the control execution circuit to control the 2 pin of the overcurrent monitoring chip Q1.
The control execution circuit comprises a capacitor C15, a switching tube Q4, resistors R17, R18, R23, R24 and R25; the 5V direct current flows to GND after passing through the resistors R17 and R24 which are sequentially connected in series, and the logic signal KZW is connected to the serial point of the resistors R17 and R24 to form a voltage dividing circuit of the logic signal KZW; the direct current flows to GND after passing through the resistors R18 and R25 which are sequentially connected IN series, and the control signals Q2-IN are connected to the serial points of the resistors R18 and R25 to form a voltage dividing circuit of the control signals Q2-IN; the base electrode of the switch tube Q4 is connected with the series point and GND of the resistors R17 and R24 through the resistor R23 and the capacitor C15 respectively, the collector electrode is connected with the series point of the resistors R18 and R25, and the emitter electrode is connected with GND.
The low dropout linear regulator circuit comprises a low dropout linear regulator U1 (LDO).
The input filter circuit includes a diode D1, a transient suppression diode TVS1, a capacitor C1, and a resistor R6, and current flows to the low dropout linear voltage regulator circuit through the diode D1, and the parallel transient suppression diode TVS1, the capacitor C1, and the resistor R6 flow to GND.
The specific model of the low dropout linear regulator U1 is MPQ2019; the specific model of the singlechip U2 is AC7811QBFE; the specific model of the overcurrent monitoring chip Q1 is BTS7004-IEPP.
The utility model has the beneficial effects that:
the overcurrent protection point is used for adjusting the overcurrent protection point (current value) according to the actual load condition so as to prevent the load from being burnt out due to overcurrent; the high-side overcurrent protection circuit has high response speed, can better protect loads, prevents overcurrent damage, and is safe and reliable.
Drawings
FIG. 1 is a schematic diagram of a high-side over-current protection circuit of the present utility model;
FIG. 2 is a schematic diagram of an input filter protection circuit and a low dropout linear voltage regulator circuit of the present utility model;
FIG. 3 is a schematic diagram of the load RL circuit, the SCM logic circuit, the high-side overcurrent detection circuit and the control execution circuit of the utility model.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present utility model is not limited to the following examples.
The high-side overcurrent protection circuit for the automobile lighting LED lamp is shown in fig. 1, and comprises an input filter protection circuit, a low-dropout linear voltage stabilizing circuit, a load RL circuit, a singlechip logic circuit, a high-side overcurrent detection circuit and a control execution circuit, wherein current enters the circuit from a network mark BAT, and is supplied to the low-dropout linear voltage stabilizing circuit through an input voltage VIN of the input filter protection circuit, and the high-side overcurrent detection circuit is used for supplying power to the load RL circuit; the low-dropout linear voltage stabilizing circuit converts the input voltage VIN into stable 5V direct current voltage and then respectively supplies power to the singlechip logic circuit and the control execution circuit; the high-side overcurrent detection circuit plays a role IN detecting overcurrent and disconnection of the load RL circuit, the singlechip logic circuit transmits an opening detection signal Q2DIN to the high-side overcurrent detection circuit after power is supplied, the high-side overcurrent detection circuit transmits a detection overcurrent signal JCW to the singlechip logic circuit, the singlechip logic circuit transmits a logic signal KZW to the control execution circuit, the control execution circuit feeds back a control signal Q2-IN to the high-side overcurrent detection circuit, and the high-side overcurrent detection circuit switches off the load RL circuit according to the control signal Q2-IN.
As shown in fig. 2, the high-side overcurrent detection circuit includes resistors R1, R4, R5, R7, R9 and R14, capacitors C6 and C8, a transient suppression diode TVS2, and an overcurrent monitoring chip Q1;
the overcurrent monitoring chip Q1 comprises 15 pins 1-15:
the 15 pin is the positive input pin of the power supply, and is accessed to the main circuit by the network mark BAT;
8. the pins 9, 10, 12, 13 and 14 are output pins of the chip, and are respectively connected with GND through a serially connected capacitor C8 and a serially connected load RL circuit after being sequentially connected in parallel;
the 1 pin is GND pin, which is connected with GND through a resistor R1 connected in series;
the pin 2 is an input control pin, and is connected with a control execution circuit through a resistor R4 connected in series, so that the high level is effective, namely when the voltage of the pin is high, the overcurrent monitoring chip Q1 is turned on, current enters from the pin 15, and flows through pins 8,9, 10, 12, 13 and 14 to supply power for a rear-stage load RL; when the pin 2 is at a low level, the overcurrent monitoring chip Q1 is turned off, no current is output by pins 8,9, 10, 12, 13 and 14, and the later-stage load does not work;
the 3 pin is an input current detection enabling pin, and is connected with a singlechip logic circuit through a resistor R5 connected in series, so that the 3 pin is high, namely when the 3 pin is high, the overcurrent monitoring chip Q1 detects the input current, otherwise, the input current is not detected;
the 4 pin is a current detection pin, and is connected with a singlechip logic circuit and GND through resistors R7 and R9 which are connected in parallel respectively, so that the input current is monitored;
5. pins 6,7 and 11 are disconnected;
the capacitor C6 is connected in parallel with the two ends of the resistors R7 and R8;
the resistor R14 and the transient suppression diode TVS2 are respectively connected in parallel across the capacitor C8.
The singlechip logic circuit comprises a singlechip U2, variable resistors B11, B12 and B13, and resistors R36, R37 and R38, wherein the singlechip U2 comprises 16, 17 and 18 pins, and the 16 pin is connected with the 4 pin of the overcurrent monitoring chip Q1 through the variable resistor B11 and the resistor R36 which are sequentially connected in series and is used for receiving a detection overcurrent signal JCW monitored by a current detection pin of the overcurrent monitoring chip Q1; the 17 pin is connected with the 3 pin of the overcurrent monitoring chip Q1 through a variable resistor B12 and a resistor R37 which are sequentially connected in series, and is used for controlling the 3 pin of the overcurrent monitoring chip Q1 to send an opening detection signal Q2DIN; and the 18 pin is connected with a control execution circuit through a variable resistor B13 and a resistor R38 which are sequentially connected IN series and is used for controlling the 2 pin of the overcurrent monitoring chip Q1 by sending control signals Q2-IN through the control execution circuit.
The control execution circuit comprises a capacitor C15, a switch tube Q4, resistors R17, R18, R23, R24 and R25; the 5V direct current flows to GND after passing through resistors R17 and R24 which are sequentially connected in series, and a logic signal KZW is connected to the serial point of the resistors R17 and R24 to form a voltage dividing circuit of the logic signal KZW; the direct current flows to GND after passing through resistors R18 and R25 which are sequentially connected IN series, and a control signal Q2-IN is connected to the serial point of the resistors R18 and R25 to form a voltage dividing circuit of the control signal Q2-IN; the base electrode of the switch tube Q4 is connected with the series point and GND of the resistors R17 and R24 respectively through the resistor R23 and the capacitor C15, the collector electrode is connected with the series point of the resistors R18 and R25, and the emitter electrode is connected with GND.
As shown in fig. 3, the low dropout linear regulator circuit includes a low dropout linear regulator U1 (LDO).
The input filter circuit comprises a diode D1, a transient suppression diode TVS1, a capacitor C1 and a resistor R6, wherein current flows to the low dropout linear voltage stabilizing circuit through the diode D1, and flows to GND through the parallel transient suppression diode TVS1, the capacitor C1 and the resistor R6.
The specific model of the low dropout linear regulator U1 is MPQ2019; the specific model of the singlechip U2 is AC7811QBFE; the specific model of the overcurrent monitoring chip Q1 is BTS7004-IEPP.
1. Normal operation:
the current of the load enters the circuit from the network mark BAT, the input filter protection circuit composed of TVS1, C1 and R6 supplies power to U1 (LDO) (low dropout linear voltage regulator), the low dropout linear voltage regulator composed of U1, R2, R3, R12, R13, C2, C3, C4, C5, C9, C10, C11 and C12 converts the input 13.5V voltage into stable 5V direct current voltage to supply power to the singlechip U2, the high-side overcurrent detection circuit composed of R1, R4, R5, R7, R9, R14, C6, C8, TVS2 and Q1 detects and protects the overcurrent of the circuit,
the 15 pin of Q1 is the positive input pin of the power supply,
the 1 foot of Q1 is negative power, the 2 foot is input control foot, high level is effective, namely Q1 is on when this pin voltage is greater than 0.4v, the electric current gets into by the 15 foot of Q1, 8,9, 10, 12, 13, 14 feet of flowing through Q1 supply power for the back-end load RL, when the 2 foot of Q1 is low level, Q1 is off, 8,9, 10, 12, 13, 14 feet of Q1 do not have electric current output, the back-end load is inoperative.
And the 3 pin of the Q1 is an input current detection enabling pin, namely when the 3 pin of the Q1 is set high, the Q1 detects the input current, otherwise, the input current is not detected.
The 4 pins of the Q1 are current detection pins for realizing the detection of input current, and detection signals are sent to the 16 pins of the singlechip U2.
the control execution circuit formed by R18, R25, Q4, C15, R23, R24 and R17 sets the state of the input Q1 to be an off state at the moment of circuit energization, so that the flashing phenomenon of the subsequent load led is prevented.
The working principle is as follows: when power is on, R17 and R24 form a resistor divider circuit, at the moment, the point KZW of the network mark is high, the voltage of the b pole of the switch tube Q4 is far more than 0.7v, the voltage of the emitter of the switch tube Q4 is 0v, ube is more than 0.7v, the switch tube Q4 is conducted, the potential of the point Q2-IN of the network mark is pulled down to low potential, namely the level of the 2 pin of the switch tube Q1 is pulled down, and the switch tube Q1 is turned off; the current detection enabling pin (3 pin) of the Q1 is controlled by the 17 pin of the singlechip U2, and the on-off input control pin (2 pin) of the Q1 is controlled by the 18 pin of the singlechip U2; the current signal monitored by the current detection pin (4 pins) of the Q1 is transmitted to the 16 pins of the singlechip U2;
after power is supplied, a low-dropout linear voltage stabilizing circuit consisting of U1, R2, R3, R12, R13, C2, C3, C4, C5, C9, C10, C11 and C12 supplies power to the singlechip U2, after the U2 works, the 17 pin of the circuit is set to be high level, the 3 pin of the Q1 is set to be high level, the current detection function of the Q1 is started, after the U2 works, the 17 pin of the circuit is set to be high level, the 18 pin is set to be low level, the point position of the KZW point of the network mark is set to be low level, the b pole voltage of the switch tube Q4 is 0v, the emitter voltage of the Q4 is 0v, ube is less than 0.7v, the Q4 is turned off, the potential of the Q2-IN point of the network mark is determined by a voltage dividing circuit consisting of R18 and R25, the potential of the Q2-IN point of the network mark is far greater than the R18, namely the 2 pin of the Q1 is set to be high level, the Q1 is turned on, and the load works normally.
2. Overcurrent condition:
when faults such as short circuit and the like occur to a load, the working current of the load rises rapidly, a current signal is transmitted to the singlechip U2 by the pin 4 of the Q1, the pin 18 level of the singlechip U2 is rapidly set to be high level (5V), namely, the network mark KZW point is high level, the Q4 is conducted, the collector electrode of the Q4 is low level, namely, the network mark Q2-IN point is low level, the pin 2 of the Q1 is low level, the Q1 is turned off, namely, the load power supply is turned off, and the load is prevented from being burnt out due to overcurrent; well protected led load circuits.
The above examples illustrate only one embodiment of the utility model, which is described in more detail and is not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (6)
1. The high-side overcurrent protection circuit for the automobile lighting LED lamp is characterized by comprising an input filter protection circuit, a low-dropout linear voltage stabilizing circuit, a load RL circuit, a singlechip logic circuit, a high-side overcurrent detection circuit and a control execution circuit, wherein current enters the circuit from a network mark BAT, and is supplied to the low-dropout linear voltage stabilizing circuit through an input voltage VIN of the input filter protection circuit and is supplied to the load RL circuit through the high-side overcurrent detection circuit; the low dropout linear voltage stabilizing circuit converts the input voltage VIN into stable 5V direct current voltage and then respectively supplies power to the singlechip logic circuit and the control execution circuit; the high-side overcurrent detection circuit plays a role IN detecting overcurrent and disconnection of the load RL circuit, the singlechip logic circuit transmits an opening detection signal Q2DIN to the high-side overcurrent detection circuit after power is supplied, the high-side overcurrent detection circuit transmits a detection overcurrent signal JCW to the singlechip logic circuit, the singlechip logic circuit transmits a logic signal KZW to the control execution circuit, the control execution circuit feeds back a control signal Q2-IN to the high-side overcurrent detection circuit, and the high-side overcurrent detection circuit switches off the load RL circuit according to the control signal Q2-IN.
2. The high-side overcurrent protection circuit for the automobile lighting LED lamp according to claim 1, wherein the high-side overcurrent detection circuit comprises resistors R1, R4, R5, R7, R9 and R14, capacitors C6 and C8, a transient suppression diode TVS2 and an overcurrent monitoring chip Q1;
the overcurrent monitoring chip Q1 comprises 15 pins 1-15:
the 15 pin is the positive input pin of the power supply, and is accessed to the main circuit by the network mark BAT;
8. the pins 9, 10, 12, 13 and 14 are output pins of the chip, and are respectively connected with GND through the serially connected capacitor C8 and the serially connected load RL circuit after being sequentially connected in parallel;
the 1 pin is GND pin, and is connected with GND through the resistor R1 connected in series;
the pin 2 is an input control pin, the control execution circuit is connected through the resistor R4 connected in series, and the high level is effective, namely when the pin voltage is high level, the overcurrent monitoring chip Q1 is turned on, current enters from the pin 15, and the current flows through the pins 8,9, 10, 12, 13 and 14 to supply power for the rear-stage load RL; when the pin 2 is in a low level, the overcurrent monitoring chip Q1 is turned off, no current is output by pins 8,9, 10, 12, 13 and 14, and the later-stage load does not work;
the 3 pin is an input current detection enabling pin, is connected with the singlechip logic circuit through the resistor R5 connected in series, is set high and effective, namely when the 3 pin is set high, the overcurrent monitoring chip Q1 detects the input current, and otherwise, does not detect the input current;
the 4 pins are current detection pins, and are respectively connected with the singlechip logic circuit and GND through the resistors R7 and R9 which are connected in parallel to realize the monitoring of input current;
5. pins 6,7 and 11 are disconnected;
the capacitor C6 is connected in parallel with two ends of the resistors R7 and R8;
the resistor R14 and the transient suppression diode TVS2 are respectively connected in parallel to two ends of the capacitor C8.
3. The high-side overcurrent protection circuit for the automobile illumination LED lamp according to claim 2, wherein the singlechip logic circuit comprises a singlechip U2, variable resistors B11, B12 and B13, and resistors R36, R37 and R38, the singlechip U2 comprises 16, 17 and 18 pins, the 16 pin is connected with the 4 pin of the overcurrent monitoring chip Q1 through the variable resistor B11 and the resistor R36 which are sequentially connected in series, and is used for receiving a detection overcurrent signal JCW monitored by a current detection pin of the overcurrent monitoring chip Q1; the 17 pin is connected with the 3 pin of the overcurrent monitoring chip Q1 through a variable resistor B12 and a resistor R37 which are sequentially connected in series, and is used for controlling the 3 pin of the overcurrent monitoring chip Q1 to send an opening detection signal Q2DIN; and the 18 pin is connected with the control execution circuit through a variable resistor B13 and a resistor R38 which are sequentially connected IN series and is used for sending a control signal Q2-IN through the control execution circuit to control the 2 pin of the overcurrent monitoring chip Q1.
4. The high-side overcurrent protection circuit for the automotive lighting LED lamp according to claim 3, wherein the control execution circuit includes a capacitor C15, a switching tube Q4, resistors R17, R18, R23, R24, and R25; the 5V direct current flows to GND after passing through the resistors R17 and R24 which are sequentially connected in series, and the logic signal KZW is connected to the serial point of the resistors R17 and R24 to form a voltage dividing circuit of the logic signal KZW; the direct current flows to GND after passing through the resistors R18 and R25 which are sequentially connected IN series, and the control signals Q2-IN are connected to the serial points of the resistors R18 and R25 to form a voltage dividing circuit of the control signals Q2-IN; the base electrode of the switch tube Q4 is connected with the series point and GND of the resistors R17 and R24 through the resistor R23 and the capacitor C15 respectively, the collector electrode is connected with the series point of the resistors R18 and R25, and the emitter electrode is connected with GND.
5. The high side over-current protection circuit for an automotive lighting LED lamp of claim 4, wherein the low dropout linear regulator circuit comprises a low dropout linear regulator U1 (LDO).
6. The high-side overcurrent protection circuit for the automotive lighting LED lamp according to claim 5, wherein the input filter circuit includes a diode D1, a transient suppression diode TVS1, a capacitor C1 and a resistor R6, and current flows through the diode D1 to the low dropout linear regulator circuit, and the transient suppression diode TVS1, the capacitor C1 and the resistor R6 connected in parallel to GND, respectively.
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| CN202223252333.2U CN219145678U (en) | 2022-12-06 | 2022-12-06 | High-side overcurrent protection circuit for automobile illumination LED lamp |
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| CN202223252333.2U CN219145678U (en) | 2022-12-06 | 2022-12-06 | High-side overcurrent protection circuit for automobile illumination LED lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117420815A (en) * | 2023-11-07 | 2024-01-19 | 一汽解放汽车有限公司 | Self-diagnosis drive output circuit, vehicle, and abnormal state determination method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117420815A (en) * | 2023-11-07 | 2024-01-19 | 一汽解放汽车有限公司 | Self-diagnosis drive output circuit, vehicle, and abnormal state determination method |
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