A circuit for realizing an ADB function of an automobile driving headlamp

CN224503559UActive Publication Date: 2026-07-14XUNCHI VEHICLE IND JIANGSU
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XUNCHI VEHICLE IND JIANGSU
Filing Date
2025-07-17
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing matrix chips that implement ADB functionality are expensive and have a significant waste of channel quantity, resulting in high costs.

Method used

The LED on/off control is achieved by using a combination of anti-reverse filtering circuit, DC-DC step-up/step-down circuit and transistor-controlled MOSFET, omitting the dedicated matrix chip and CAN transceiver, and controlling the MOSFET on/off via ECU.

Benefits of technology

It achieves the ADB function that can flexibly light up any number of LEDs, reducing costs and avoiding dependence on expensive matrix chips.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224503559U_ABST
Patent Text Reader

Abstract

The utility model discloses a kind of circuit for realizing ADB function of automobile driving front headlamp, including the anti-reverse filter circuit of the connection vehicle battery, the IO port of anti-reverse filter circuit connection ECU, the input port of anti-reverse filter circuit connection DC-DC buck circuit, the error fault pin FAULT of DC-DC buck circuit chip is connected to ECU, ECU detects the level change of FAULT pin, immediately enable foot of DC-DC buck circuit chip is pulled low, ECU connects triode, triode controls the on-off of MOS tube, and MOS tube connects single LED.The utility model passes through the KL30 current of automobile battery to the light fixture controller, after passing through anti-reverse filter circuit, power supply is given to LED by DCDC buck circuit, and the on-off of MOS tube is indirectly controlled by triode by IO port of ECU to realize the bright and dark control of single LED.
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