Miniaturized integrated vehicle lamp buck circuit
By incorporating inductors and capacitors into the headlight BUCK circuit, miniaturization and high reliability of the headlight circuit are achieved, solving the reliability and miniaturization problems of traditional headlight circuits, reducing system costs and electromagnetic interference, and meeting the needs of automakers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING GUINUO PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional automotive lighting circuits suffer from low electro-optical conversion efficiency, high power consumption, high color temperature, complex structure, and high failure rate, and are difficult to miniaturize and highly integrate.
A miniaturized integrated BUCK circuit is adopted. By integrating inductors, input capacitors, and BST capacitors into the BUCK_IC integrated chip, the wiring area is reduced, enabling a single-sided board design. Capacitors and resistors are added at the pins to optimize the circuit and improve its stability.
It achieves miniaturization and high reliability of automotive lighting circuits, reduces system size, weight and cost, improves EMI performance and circuit flexibility, and meets the needs of automakers for cost control and safety.
Smart Images
Figure CN224385745U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive lighting circuit technology, and specifically discloses a miniaturized integrated automotive lighting BUCK circuit. Background Technology
[0002] Currently, most car and electric vehicle headlights use high-power halogen or xenon lamps. Halogen lamps have low electro-optical conversion efficiency, high power consumption, and short lifespan; xenon lamps have high color temperature, poor penetration through fog, and require high-voltage circuits and ballasts, resulting in complex circuit structures and high failure rates.
[0003] In recent years, with the rise of emerging technologies such as the Internet of Things and artificial intelligence, higher requirements have been placed on the performance, power consumption, and size of integrated circuits. Miniaturized integrated circuits have become one of the important development directions. As a core component of power management chips, the miniaturization and integration of BUCK circuits is of great significance. Through high integration and advanced processes, BUCK circuits can be miniaturized, meeting the needs of portable electronic products for small size and lightweight design. At the same time, miniaturized integrated BUCK circuits can also reduce electromagnetic interference, improve energy efficiency, and thus extend battery life.
[0004] A buck circuit is a non-isolated DC-DC converter primarily used to step down an input voltage and convert it into a stable low-voltage output. It is widely used in electronic device power supplies, energy recovery systems, and LED drivers. Future development goals for miniaturized integrated buck circuit technology include further increasing integration and reducing chip size; optimizing circuit design and reducing power consumption; employing new processes and materials to enhance anti-interference capabilities; and improving reliability and consistency. Through continuous innovation, achieving high integration and miniaturization of buck circuits will provide efficient and energy-saving power solutions for portable electronic devices, IoT terminals, and other fields, driving the development of related industries.
[0005] This invention provides a miniaturized integrated vehicle headlight BUCK circuit to solve the above-mentioned problems. Utility Model Content
[0006] The purpose of this invention is to solve the reliability problem of traditional vehicle light circuits by using a vehicle light BUCK circuit, thereby helping to improve the stability of the system.
[0007] To achieve the above objectives, this utility model provides the following basic solution:
[0008] A miniaturized integrated vehicle light BUCK circuit includes a BUCK_IC integrated chip, wherein the BUCK_IC integrated chip includes a VIN pin, an EN pin, a VOUT pin, an FB pin, a VCC pin, and a BST pin;
[0009] The VIN pin is connected to a first capacitor bank and a second capacitor bank. The EN pin is connected to a first resistor to form POWER_IN. The FB pin is equipped with a voltage divider resistor for voltage division. The VOUT pin is connected to a third capacitor bank.
[0010] Furthermore, the BUCK_IC integrated chip has a built-in inductor, two input capacitors, a BST capacitor, and a VCC capacitor. The inductor is connected to the VOUT pin, the two input capacitors are connected to the VIN pin, the BST capacitor is connected to the BST pin, and the VCC capacitor is connected to the VCC pin.
[0011] Furthermore, the first capacitor group includes a first capacitor a and a first capacitor b connected in parallel, both of which have a capacitance of 0.1uF; the second capacitor group includes a second capacitor a and a second capacitor b connected in parallel, both of which have a capacitance of 4.7uF; and the third capacitor group includes a third capacitor a and a third capacitor b connected in parallel, both of which have a capacitance of 22uF.
[0012] Furthermore, the resistance value of the first resistor is 10K, and the EN pin is pulled up with a 10K resistor to form POWER_IN.
[0013] Furthermore, the voltage divider resistor includes a first divider resistor and a second divider resistor connected in series, and the reference voltage of the FB pin is 0.8V.
[0014] Furthermore, it also includes a grounding circuit. The BUCK_IC integrated chip also includes AGND pins and GND pins, which are connected to the grounding circuit.
[0015] The principle and effect of this solution are as follows:
[0016] 1. Compared with existing technologies, this solution reduces wiring area by integrating capacitors and output inductors inside the BUCK_IC integrated chip, achieving a single-sided board design, thereby significantly reducing the space occupied and lowering the system size and weight.
[0017] 2. Compared with existing technologies, the integrated design reduces the current loop area, reduces electromagnetic radiation, improves EMI performance, effectively avoids external electromagnetic interference, and reduces component costs, thereby reducing the overall system cost.
[0018] 3. Compared with existing technologies, this technical solution adopts an integrated approach, resulting in lower costs and effectively reducing the manufacturing costs of automotive lighting circuits, thus meeting the cost control needs of automakers. Secondly, this technical solution offers high flexibility, allowing for modification and adjustment according to actual needs, better meeting automakers' miniaturization requirements for circuit design. Furthermore, this technical solution boasts high reliability, effectively preventing malfunctions under special circumstances and meeting automakers' safety requirements. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This paper shows a schematic diagram of the internal logic operation of the BUCK_IC integrated chip in a miniaturized integrated vehicle light BUCK circuit according to an embodiment of this application.
[0021] Figure 2 This paper shows a schematic diagram of the external pin connections of the BUCK_IC integrated chip in a miniaturized integrated vehicle light BUCK circuit proposed in an embodiment of this application. Detailed Implementation
[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0023] The reference numerals in the accompanying drawings include: BUCK_IC integrated chip 1, VIN pin 2, first capacitor group 3, second capacitor group 4, first resistor 5, ground circuit 6, voltage divider resistor 7, VOUT pin 8, FB pin 9, third capacitor group 10.
[0024] Implementation, for example Figure 1 and Figure 2 As shown:
[0025] A miniaturized integrated vehicle light BUCK circuit includes a BUCK_IC integrated chip 1, wherein the BUCK_IC integrated chip 1 includes a VIN pin 2, an EN pin, a VOUT pin 8, an FB pin 9, a VCC pin, and a BST pin;
[0026] The VIN pin 2 is connected to a first capacitor group 3 and a second capacitor group 4. The EN pin is connected to a first resistor 5 to form POWER_IN. The FB pin 9 is provided with a voltage divider resistor 7 for voltage division. The VOUT pin 8 is connected to a third capacitor group 10. The voltage divider resistor 7 includes a first divider resistor and a second divider resistor connected in series. The reference voltage of the FB pin 9 is 0.8V.
[0027] like Figure 1 As shown, regarding the BUCK_IC integrated chip 1, the improvement is that the BUCK_IC integrated chip 1 has a built-in inductor, two input capacitors, a BST capacitor and a VCC capacitor. The inductor is connected to the VOUT pin 8, the two input capacitors are connected to the VIN pin 2, the BST capacitor is connected to the BST pin, and the VCC capacitor is connected to the VCC pin.
[0028] The remaining operating logic is the same as the design logic of the traditional BUCK_IC integrated chip 1. Only an inductor, two input capacitors, a BST capacitor and a VCC capacitor are integrated on the above-mentioned pins. By integrating the capacitors and output inductors inside the BUCK_IC integrated chip 1, the wiring area is reduced, and a single-sided board design is realized, thereby greatly reducing the space occupied and reducing the system size and weight.
[0029] like Figure 2 As shown, a grounding circuit 6 is designed on the outside of the BUCK_IC integrated chip 1. The BUCK_IC integrated chip 1 also includes AGND pin and GND pin, which are connected to the grounding circuit 6.
[0030] like Figure 2 As shown, the first capacitor group 3 includes a first capacitor a and a first capacitor b connected in parallel, both with a capacitance of 0.1uF. The second capacitor group 4 includes a second capacitor a and a second capacitor b connected in parallel, both with a capacitance of 4.7uF. The third capacitor group 10 includes a third capacitor a and a third capacitor b connected in parallel, both with a capacitance of 22uF.
[0031] The first resistor 5 has a resistance value of 10K, the EN pin is pulled up with a 10K resistor to form POWER_IN, the voltage divider resistor 7 includes a first divider resistor and a second divider resistor connected in series, and the reference voltage of the FB pin 9 is 0.8V.
[0032] Another improvement in this solution is the corresponding processing of the four functional pins: VIN pin 2, EN pin, VOUT pin 8, and FB pin 9. For the processing of VI pin N, two 0.1uF first capacitors (3) and two 4.7uF second capacitors (4) are added. The EN pin is pulled up with a 10K resistor to POWER_IN. The value of VOUT pin 8 is set and adjusted by the voltage divider resistor 7 on FB pin 9. The reference voltage of FB pin 9 is 0.8V, which can be configured to the required voltage. Two 22uF third capacitors (10) are added to the Vout pin.
[0033] The purpose of this invention is to solve the reliability problem of traditional vehicle light circuits by using a vehicle light BUCK circuit, thereby helping to improve the stability of the system.
[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A miniaturized integrated vehicle lamp BUCK circuit, characterized by, It includes the BUCK_IC integrated chip, which includes VIN pin, EN pin, VOUT pin, FB pin, VCC pin and BST pin; The VIN pin is connected to a first capacitor bank and a second capacitor bank. The EN pin is connected to a first resistor to form POWER_IN. The FB pin is equipped with a voltage divider resistor for voltage division. The VOUT pin is connected to a third capacitor bank.
2. The miniaturized integrated vehicle lamp BUCK circuit according to claim 1, characterized in that, The BUCK_IC integrated chip has a built-in inductor, two input capacitors, a BST capacitor, and a VCC capacitor. The inductor is connected to the VOUT pin, the two input capacitors are connected to the VIN pin, the BST capacitor is connected to the BST pin, and the VCC capacitor is connected to the VCC pin.
3. The miniaturized integrated vehicle lamp BUCK circuit according to claim 2, characterized in that, The first capacitor group includes a first capacitor a and a first capacitor b connected in parallel, both with a capacitance of 0.1uF. The second capacitor group includes a second capacitor a and a second capacitor b connected in parallel, both with a capacitance of 4.7uF. The third capacitor group includes a third capacitor a and a third capacitor b connected in parallel, both with a capacitance of 22uF.
4. The miniaturized integrated vehicle lamp BUCK circuit according to claim 3, characterized in that, The first resistor has a resistance value of 10K, and the EN pin is pulled up with a 10K resistor to form POWER_IN.
5. The miniaturized integrated vehicle lamp BUCK circuit according to claim 3, wherein The voltage divider resistors include a first divider resistor and a second divider resistor connected in series, and the reference voltage of the FB pin is 0.8V.
6. The miniaturized integrated vehicle light BUCK circuit according to claim 5, characterized in that, It also includes a grounding circuit. The BUCK_IC integrated chip also includes AGND pins and GND pins, which are connected to the grounding circuit.