An integrated drive circuit for rear fog reversing lights

Abstract

This utility model belongs to the technical field of reversing light drive circuits, specifically an integrated drive circuit for a rear fog reversing light, including a rear fog light control module, a reversing light control module, and an LED chip module. The rear fog light control module is connected to both the reversing light control module and the LED chip module. The LED chip module is also connected to both the rear fog light control module and the reversing light control module. In this application, the LED driver ensures that the LED current remains constant when the input voltage changes from 9V to 16V, allowing the LED brightness to vary within a small range, thus ensuring consistent product brightness. It simplifies the assembly process, reduces manual soldering and wiring harness installation time, and improves production line efficiency. Compared to discrete component circuits, the LED driver chip-level integrated solution has stronger vibration and electromagnetic interference resistance, reducing the probability of failure.

Description

Technical Field

[0001] This utility model relates to the field of reversing light drive circuit technology, specifically an integrated drive circuit for a rear fog reversing light. Background Technology

[0002] Reversing lights are installed at the rear of the vehicle to illuminate the road behind the vehicle when reversing and to warn vehicles and pedestrians behind. During the use of rear fog reversing lights, they need to be controlled by a drive circuit.

[0003] However, the existing drive circuits still have the following technical problems when in use:

[0004] The brightness of current LEDs varies during use, making it impossible to maintain consistent brightness. Current LED driver circuits are complex and cannot guarantee integrated design and independent control of the rear fog light and reversing light circuits in automobiles. The wiring harnesses, electronic components, connectors, and plugs in current LED driver circuits are all complex, resulting in high production costs. Currently, discrete circuits require two driver chips, a relay, and an isolation circuit, which leads to long debugging and development times.

[0005] Therefore, an integrated driver circuit for rear fog reversing lights is proposed to solve the aforementioned problems. Utility Model Content

[0006] The purpose of this invention is to provide an integrated drive circuit for a rear fog reversing light to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an integrated drive circuit for a rear fog reversing light, comprising a rear fog light control module, a reversing light control module, and an LED lamp bead module, wherein the rear fog light control module is connected to both the reversing light control module and the LED lamp bead module; the reversing light control module is connected to both the rear fog light control module and the LED lamp bead module; and the LED lamp bead module is connected to both the rear fog light control module and the reversing light control module.

[0008] Preferably, the rear fog light control module includes capacitors C1, C2, C5, C7, C9, C11, C15, C17, C19, C20, and C23; diodes D1 and D3; TVS diode TVS1; ferrite bead FB1 and ferrite bead FB3; inductors L1, L3, and L5; chip U1; resistors R1 and R2; connector J1; and connector J2.

[0009] Preferably, the reversing light control module includes capacitors C3, C4, C6, C8, C10, C12, C16, C18, C21, C22, and C24; diodes D2 and D4; TVS diode TVS2; ferrite bead FB2 and ferrite bead FB4; inductors L2, L4, and L6; chip U2; resistors R3, R4, and R5.

[0010] Preferably, the LED lamp bead module includes capacitor C1, capacitor C2, LED1, LED2, LED3, LED4, LED5, LED6, LED7, and connector J1.

[0011] Preferably, the model of the chips U1 and U2 is AL8843-QSP.

[0012] Preferably, the model of LED1, LED2, LED3, and LED4 is NJSW123GT.

[0013] Preferably, the model of LED5, LED6, and LED7 is KR DMLQ32.23.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this application, the LED driver ensures that the LED current remains constant when the input voltage changes from 9V to 16V, thereby enabling the LED brightness to vary within a small range and ensuring consistent product brightness.

[0016] LED drivers enable integrated design and independent control of automotive rear fog lights and reversing lights circuits, simplifying the circuit structure while retaining functional independence.

[0017] Integrating the circuitry of two chips onto the same PCB in an LED driver reduces redundant wiring harnesses, the number of electronic components, and the number of connectors and plugs, effectively lowering material costs.

[0018] LED drivers integrate the circuitry of two chips onto the same PCB, which simplifies the circuit design process compared to traditional discrete circuits that require two driver chips, relays, and isolation circuits. This reduces the time spent on schematic drawing, PCB layout, and debugging, and shortens the development cycle.

[0019] Simplify assembly processes, reduce manual welding and wire harness installation time, and improve production line efficiency;

[0020] Compared to discrete component circuits, LED driver chip-level integrated solutions offer stronger resistance to vibration and electromagnetic interference, reducing the probability of failure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the principle of this utility model;

[0022] Figure 2 This is a schematic diagram of the rear fog light control module of this utility model;

[0023] Figure 3 This is a schematic diagram of the reversing light control module of this utility model;

[0024] Figure 4 This is a schematic diagram of the LED lamp bead module of this utility model.

[0025] In the diagram: 1 Rear fog light control module, 2 Reversing light control module, 3 LED lamp module. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Example:

[0029] Please see Figure 1-4 This utility model provides a technical solution:

[0030] An integrated drive circuit for a rear fog reversing light includes a rear fog light control module 1, a reversing light control module 2, and an LED lamp module 3. The rear fog light control module 1 is connected to both the reversing light control module 2 and the LED lamp module 3. The reversing light control module 2 is connected to both the rear fog light control module 2 and the LED lamp module 3. The LED lamp module 3 is connected to both the rear fog light control module 1 and the reversing light control module 2.

[0031] The rear fog light control module 1 includes capacitors C1, C2, C5, C7, C9, C11, C15, C17, C19, C20, and C23; diodes D1 and D3; TVS diode TVS1; ferrite bead FB1 and ferrite bead FB3; inductors L1, L3, and L5; chip U1; resistors R1 and R2; connector J1; and connector J2.

[0032] One end of capacitor C1 is connected to pin 1 of connector J1. The other end of capacitor C1 is connected to one end of capacitor C2. The other end of capacitor C2 is connected to one end of TVS transistor TVS1, one end of ferrite bead FB1, and pin 2 of connector J1. One end of capacitor C5 is connected to one end of ferrite bead FB3 and one end of inductor L1. The other end of capacitor C5 is connected to one end of ferrite bead FB1 and ground. One end of capacitor C7 is connected to one end of inductor L1, one end of capacitor C9, one end of capacitor C11, one end of resistor R1, one end of resistor R2, pin 6 of chip U1, and the cathode of diode D3. The other end of capacitor C7 is grounded. One end of capacitor C9 is connected to one end of capacitor C7, one end of capacitor C11, one end of resistor R1, one end of resistor R2, and pin 6 of chip U1. One end of capacitor C11 is connected to one end of capacitor C7, one end of capacitor C9, one end of resistor R1, one end of resistor R2, pin 6 of chip U1, and the cathode of diode D3. The other end of capacitor C11 is grounded. One end of capacitor C15 is connected to pins 7 and 8 of chip U1. The other end of capacitor C15 is grounded. One end of capacitor C17 is connected to one end of resistor R1, one end of resistor R2, and pin 3 of chip U1. The other end of capacitor C17 is connected to one end of inductor L3, one end of capacitor C20, and pin 4 of inductor L5. One end of capacitor C19 is connected to one end of resistor R1, one end of resistor R2, pin 3 of chip U1, and the cathode of diode D3. One end of inductor L5 is connected to pin 3, the other end of capacitor C19 is grounded, one end of capacitor C20 is connected to one end of inductor L3 and pin 4 of inductor L5, one end of capacitor C17 is connected to one end of capacitor C20 and the other end of capacitor C20 is grounded, one end of capacitor C23 is connected to pin 1 of inductor L5 and pin 3 of connector J2, the other end of capacitor C23 is connected to pin 2 of inductor L5 and pin 4 of connector J2, one end of TVS transistor TVS1 is connected to pin 1 of connector J1, the other end of TVS transistor TVS1 is connected to one end of capacitor C2, one end of ferrite bead FB1 and pin 2 of connector J1, the anode of diode D1 is connected to pin 1 of connector J1, the cathode of diode D1 is connected to one end of ferrite bead FB3, and the cathode of diode D3 is connected to pin 4 of connector J1. The cathode of diode D3 is connected to one end of inductor L3, pins 7 and 8 of the chip, and one end of capacitor C15. The cathode of diode D3 is connected to one end of resistor R1, one end of resistor R2, and pin 6 of the chip. One end of ferrite bead FB1 is connected to one end of capacitor C2, one end of TVS transistor TVS1, and ground. The other end of ferrite bead FB1 is connected to one end of capacitor C5 and ground. One end of ferrite bead FB3 is connected to the cathode of diode D1. The other end of ferrite bead FB3 is connected to one end of capacitor C5 and one end of inductor L1. One end of inductor L1 is connected to one end of ferrite bead FB3 and one end of capacitor C5. The other end of inductor L1 is connected to one end of capacitor C7, one end of capacitor C9, one end of capacitor C11, one end of resistor R1, one end of resistor R2, and pin 6 of the chip.One end of inductor L3 is connected to the positive terminal of diode D3, pins 7 and 8 of the chip, and one end of capacitor C15. The other end of inductor L3 is connected to one end of capacitor C17, one end of capacitor C20, and pin 4 of inductor L5. Pin 1 of inductor L5 is connected to one end of capacitor C23 and pin 3 of connector J2. Pin 2 of inductor L5 is connected to one end of capacitor C23 and pin 4 of connector J2. Pin 3 of inductor L5 is connected to one end of capacitor C19, one end of capacitor C17, one end of resistor R1, one end of resistor R2, and pin 3 of chip U1. Pin 4 of inductor L5 is connected to one end of capacitor C20, one end of capacitor C17, and one end of inductor L3. Pins 1, 2, and 9 of chip U1 are connected to... Pins 4 and 5 of chip U1 are left floating. Pin 3 of chip U1 is connected to one end of resistor R1, one end of resistor R2, one end of capacitor C17, one end of capacitor C19, and pin 3 of inductor L5. Pin 6 of chip U1 is connected to one end of resistor R1, one end of resistor R2, and the cathode of diode D3. Pin 7 of chip U1 is connected to pin 8 of chip U1, one end of capacitor C15, the anode of diode D3, and one end of inductor L3. Pin 8 of chip U1 is connected to pin 7 of chip U1, one end of capacitor C15, the anode of diode D3, and one end of inductor L3. One end of resistor R1 is connected to one end of inductor L1, one end of capacitor C7, one end of capacitor C9, one end of capacitor C11, and resistor R2. One end of resistor R1 is connected to pin 6 of chip U1 and the cathode of diode D3. The other end of resistor R1 is connected to one end of resistor R2, pin 3 of chip U1, one end of capacitor C17, one end of capacitor C19, and pin 3 of inductor L5. One end of resistor R2 is connected to one end of inductor L1, one end of capacitor C7, one end of capacitor C9, one end of capacitor C11, one end of resistor R1, pin 6 of chip U1, and the cathode of diode D3. The other end of resistor R2 is connected to one end of resistor R1, pin 3 of chip U1, one end of capacitor C17, one end of capacitor C19, and pin 3 of inductor L5. The first pin of connector J1 is connected to one end of capacitor C2, one end of ferrite bead FB1, and one end of TVS transistor TVS1. Pin 2 of connector J1 connects to one end of capacitor C2, one end of ferrite bead FB1, and one end of TVS transistor TVS1. Pin 3 of connector J1 connects to one end of capacitor C3, one end of ferrite bead FB4, and one end of TVS transistor TVS2 in the reversing light control module. Pin 1 of connector J2 connects to one end of capacitor C24 in the reversing light control module, one pin 1 of inductor L6, and one pin 1 of connector J1 in the LED lamp module. Pin 2 of connector J2 connects to one end of capacitor C24 in the reversing light control module, one pin 2 of inductor L6, and one pin 2 of connector J1 in the LED lamp module. Pin 3 of connector J2 connects to one end of capacitor C23, one pin 1 of inductor L5, and one pin 3 of connector J1 in the LED lamp module.Pin 4 of connector J2 connects to one end of capacitor C23 and pin 2 of inductor L5, as well as pin 4 of connector J1 of the LED module.

[0033] The reversing light control module 2 includes capacitors C3, C4, C6, C8, C10, C12, C16, C18, C21, C22, and C24; diodes D2 and D4; TVS diode TVS2; ferrite bead FB2 and ferrite bead FB4; inductors L2, L4, and L6; chip U2; and resistors R3, R4, and R5.

[0034] One end of capacitor C3 is connected to pin 1 of connector J1 of the rear fog light control module. The other end of capacitor C3 is connected to one end of capacitor C4. The other end of capacitor C4 is connected to one end of TVS transistor TVS2, one end of ferrite bead FB2, and pin 2 of connector J1 of the rear fog light control module. One end of capacitor C6 is connected to one end of ferrite bead FB4 and one end of inductor L2. The other end of capacitor C6 is connected to one end of ferrite bead FB2 and ground. One end of capacitor C8 is connected to one end of inductor L2, one end of capacitor C10, one end of capacitor C12, one end of resistor R3, one end of resistor R4, pin 6 of chip U2, and the cathode of diode D4. The other end of capacitor C8 is grounded. One end of capacitor C10 is connected to one end of capacitor C8 and one end of capacitor C10. One end of capacitor C10 is connected to one end of capacitor C2, one end of resistor R1, one end of resistor R2, pin 6 of chip U2, and the cathode of diode D4. The other end of capacitor C10 is grounded. One end of capacitor C12 is connected to one end of capacitor C8, one end of capacitor C10, one end of resistor R1, one end of resistor R2, pin 6 of chip U2, and the cathode of diode D3. The other end of capacitor C12 is grounded. One end of capacitor C16 is connected to pins 7 and 8 of chip U2. The other end of capacitor C16 is connected to one end of resistor R5. One end of capacitor C18 is connected to one end of resistor R3, one end of resistor R4, and pin 3 of chip U2. The other end of capacitor C18 is connected to one end of inductor L4, one end of capacitor C22, and pin 4 of inductor L6. Capacitor C21... One end of capacitor C21 is connected to one end of resistor R3, one end of resistor R4, pin 3 of chip U2, one end of capacitor C18, and pin 3 of inductor L6. The other end of capacitor C21 is grounded. One end of capacitor C22 is connected to one end of inductor L4, pin 4 of inductor L6, and one end of capacitor C18. The other end of capacitor C22 is grounded. One end of capacitor C24 is connected to pin 1 of inductor L6 and pin 1 of connector J2 of the rear fog light control module. The other end of capacitor C24 is connected to pin 2 of inductor L6 and pin 2 of connector J2 of the rear fog light control module. One end of TVS diode TVS2 is connected to pin 3 of connector J1 of the rear fog light control module. The other end of TVS diode TVS2 is connected to one end of capacitor C3 and ferrite bead FB. One end of diode D2 is connected to pin 2 of connector J1 of the rear fog light control module. The positive terminal of diode D2 is connected to pin 3 of connector J1 of the rear fog light control module. The negative terminal of diode D2 is connected to one end of ferrite bead FB4. The positive terminal of diode D4 is connected to one end of inductor L4, pins 7 and 8 of chip U2, and one end of capacitor C16. The negative terminal of diode D4 is connected to one end of resistor R3, one end of resistor R4, and pin 6 of chip U2. One end of ferrite bead FB2 is connected to one end of capacitor C4, one end of TVS transistor TVS2, and ground. The other end of ferrite bead FB2 is connected to one end of capacitor C6 and ground. One end of ferrite bead FB4 is connected to the negative terminal of diode D2. The other end of ferrite bead FB4 is connected to one end of capacitor C6 and one end of inductor L2.One end of inductor L2 is connected to one end of ferrite bead FB4 and one end of capacitor C6. The other end of inductor L2 is connected to one end of capacitor C8, one end of capacitor C10, one end of capacitor C12, one end of resistor R3, one end of resistor R4, and pin 6 of chip U2. One end of inductor L4 is connected to the positive terminal of diode D4, pins 7 and 8 of chip U2, and one end of capacitor C16. The other end of inductor L4 is connected to one end of capacitor C18, one end of capacitor C21, and pin 4 of inductor L6. Pin 1 of inductor L6 is connected to one end of capacitor C24 and pin 1 of connector J2 of the rear fog light control module. Pin 2 of inductor L6 is connected to one end of capacitor C24 and pin 2 of connector J2 of the rear fog light control module. Pin 3 of inductor L6 is connected to one end of capacitor C18, one end of capacitor C21, one end of resistor R3, one end of resistor R4, and pin 3 of chip U2. Pin 4 of inductor L6 is connected to one end of capacitor C22, one end of capacitor C18, and one end of inductor L4. Pins 1, 2, and 9 of chip U2 are grounded. Pins 4 and 5 of chip U2 are left floating. Pin 3 of chip U2 is connected to one end of resistor R3, one end of resistor R4, and capacitor C18. One end of chip U2, one end of capacitor C21, and pin 3 of inductor L6; pin 6 of chip U2 is connected to one end of resistor R3, one end of resistor R4, and the cathode of diode D4; pin 7 of chip U2 is connected to pin 8 of chip U2, one end of capacitor C16, the anode of diode D4, and one end of inductor L4; pin 8 of chip U2 is connected to pin 7 of chip U2, one end of capacitor C16, the anode of diode D4, and one end of inductor L4; one end of resistor R3 is connected to one end of inductor L2, one end of capacitor C8, one end of capacitor C10, one end of capacitor C12, and one end of resistor R4. One end of resistor R3 is connected to pin 6 of chip U2 and the cathode of diode D4. The other end of resistor R3 is connected to one end of resistor R4, pin 3 of chip U2, one end of capacitor C18, one end of capacitor C21, and pin 3 of inductor L6. One end of resistor R4 is connected to one end of inductor L2, one end of capacitor C8, one end of capacitor C10, one end of capacitor C12, one end of resistor R3, pin 6 of chip U2, and the cathode of diode D4. The other end of resistor R4 is connected to one end of resistor R3, pin 3 of chip U2, one end of capacitor C18, one end of capacitor C21, and pin 3 of inductor L6.

[0035] LED lamp bead module 3 includes capacitor C1, capacitor C2, LED1, LED2, LED3, LED4, LED5, LED6, LED7, and connector J1;

[0036] One end of capacitor C1 is connected to pin 2 of connector J1, the positive terminals of LED1, LED2, LED3, and LED4. The other end of capacitor C1 is connected to pin 1 of connector J1, the negative terminals of LED1, LED2, LED3, and LED4. The positive terminal of LED1 is connected to pin 2 of connector J1, one end of capacitor C1, the positive terminals of LED2, LED3, and LED4. The negative terminal of LED1 is connected to pin 1 of connector J1, one end of capacitor C1, the negative terminals of LED2, LED3, and LED4. The positive terminal of LED2... Connect the second pin of connector J1, one end of capacitor C1, the positive terminals of LED1, LED3, and LED4. Connect the negative terminal of LED2 to the first pin of connector J1, one end of capacitor C1, the negative terminals of LED1, LED3, and LED4. Connect the positive terminal of LED3 to the second pin of connector J1, one end of capacitor C1, the positive terminals of LED1, LED2, and LED4. Connect the negative terminal of LED3 to the first pin of connector J1, one end of capacitor C1, the negative terminals of LED1, LED2, and LED4. Connect the positive terminal of LED4 to connector J1. Pin 2, one end of capacitor C1, the positive terminal of LED1, the positive terminal of LED2, the positive terminal of LED3, and the negative terminal of LED4 are connected to pin 1 of connector J1, one end of capacitor C1, the negative terminal of LED1, the negative terminal of LED2, and the negative terminal of LED3. The positive terminal of LED5 is connected to pin 4 of connector J1 and one end of capacitor C2. The negative terminal of LED5 is connected to the positive terminal of LED6. The positive terminal of LED6 is connected to the negative terminal of LED5. The negative terminal of LED6 is connected to the positive terminal of LED7. The positive terminal of LED7 is connected to the negative terminal of LED6. The negative terminal of LED7 is connected to pin 3 of connector J1 and one end of capacitor C2. One end of capacitor C2 is connected to pin 4 of connector J1 and the positive terminal of LED5. The other end of capacitor C2 is connected to pin 3 of connector J1 and the negative terminal of LED7. Pin 1 of connector J1 is connected to one end of capacitor C1 and the negative terminals of LED1, LED2, LED3, and LED4. Pin 2 of connector J1 is connected to one end of capacitor C1 and the positive terminals of LED1, LED2, LED3, and LED4. Pin 3 of connector J1 is connected to one end of capacitor C2 and the negative terminal of LED7. Pin 4 of connector J1 is connected to one end of capacitor C2 and the positive terminal of LED5.

[0037] The model numbers of chips U1 and U2 are AL8843-QSP.

[0038] The model numbers for LED1, LED2, LED3, and LED4 are NJSW123GT.

[0039] The model number for LED5, LED6, and LED7 is KR DMLQ32.23.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rear fog and reversing lamp integrated driving circuit, comprising a rear fog lamp control module (1), a reversing lamp control module (2) and an LED lamp bead module (3), characterized in that, The rear fog light control module (1) is connected to the reversing light control module (2) and the LED lamp bead module (3) respectively; the reversing light control module (2) is connected to the rear fog light control module (1) and the LED lamp bead module (3) respectively; the LED lamp bead module (3) is connected to the rear fog light control module (1) and the reversing light control module (2) respectively.

2. The integrated driving circuit of a rear fog reversing lamp according to claim 1, characterized in that: The rear fog light control module (1) includes capacitors C1, C2, C5, C7, C9, C11, C15, C17, C19, C20, and C23, diodes D1 and D3, TVS tube TVS1, ferrite bead FB1 and ferrite bead FB3, inductors L1, L3, and L5, chip U1, resistors R1 and R2, connector J1, and connector J2.

3. The integrated drive circuit for a rear fog reversing lamp according to claim 2, wherein: The reversing light control module (2) includes capacitors C3, C4, C6, C8, C10, C12, C16, C18, C21, C22, and C24, diodes D2 and D4, TVS tube TVS2, ferrite bead FB2 and ferrite bead FB4, inductors L2, L4, and L6, chip U2, resistors R3, R4, and R5.

4. The integrated drive circuit for a rear fog reverse light according to claim 1, wherein: The LED lamp bead module (3) includes capacitor C1, capacitor C2, LED1, LED2, LED3, LED4, LED5, LED6, LED7, and connector J1.

5. The integrated drive circuit for a rear fog reverse light according to claim 3, wherein: The model of the chips U1 and U2 is AL8843-QSP.

6. The integrated drive circuit for a rear fog reverse light according to claim 4, wherein: The model number of LED1, LED2, LED3, and LED4 is NJSW123GT.

7. The integrated drive circuit for a rear fog reverse light according to claim 4, wherein: The model number of LED5, LED6, and LED7 is KR DMLQ32.23.

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