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Headlight

Products and reference designs
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Headlight

Block diagram

Overview

Our integrated circuits and reference designs for automotive headlight applications help you create compact, efficient and reliable adaptive front-lighting systems (AFS), adaptive beam (ADB) and high-resolution headlight systems while meeting stringent automotive EMC requirements.

Design requirements

    LED headlight circuit designs require:

  • High-accuracy LED current control.
  • Comprehensive diagnostics for fault identification.
  • Minimized conducted and radiated emissions.
  • Flexibility to create scalable headlight systems.
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Block diagram

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Front fog light LED driving module

Headlight - DRL/position LED driving module

Headlight - HB/LB LED driving module

Headlight - adaptive LED board

Headlight - adaptive LED driving module

Headlight - basic LED driving module

Headlight - high resolution DLP module

Headlight - single feature / bulb replacement

Headlight - adaptive LED driving module

LED driving module LED driving module Adaptive LED board Adaptive LED board M M M M High beam High beam Low beam Low beam DRL DRL Position Position Cornering Cornering Fog Fog Turn Turn Side Side CAN transceiver CAN transceiver LED matrix manager LED matrix manager Car battery Car battery Body control module Body control module Temperature sensor Temperature sensor Power supply Power supply Reverse voltage protection Reverse voltage protection Voltage supervisor Voltage supervisor Watchdog Watchdog Voltage regulator Voltage regulator LED power supply LED power supply Voltage regulator Voltage regulator LED driver LED driver Constant current regulator Constant current regulator Communication interface Communication interface CAN / LIN CAN / LIN CAN / LIN ESD CAN / LIN ESD Diagnostic inputs Diagnostic inputs OP amp OP amp Comparator Comparator Reference Reference MCU MCU MCU MCU Thermal protection Thermal protection Temp sensor Temp sensor CAN transceiver CAN transceiver CAN transceiver CAN transceiver Fan driver Fan driver High side switch High side switch Level/swivel control Level/swivel control Motor driver Motor driver

CAN transceiver

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The differential communication interface is a 2-wire differential communication physical layer and is used to communicate between the LED board and lighting control module. Differential communication is used to ensure reliable communication.

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Interface (6)
CAN transceivers

    Technical documentation

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    Type Title Date
    Technical article Designing a headlight ECU with a high-power-density constant-on-time DC/DC buck LE PDF | HTML 28 Jul 2023
    Technical article How semiconductor technologies are changing automotive lighting roadmaps PDF | HTML 25 Jul 2023
    White paper 자동차 후미등의 트렌드와 토폴로지 (Rev. A) 16 Oct 2019
    White paper 汽車尾燈系統的趨勢與拓撲 (Rev. A) 14 Oct 2019
    White paper Evolution vs. revolution: the building blocks of automotive body electronics 11 Apr 2018
    Technical article What headlight resolution is high enough for symbol projection? PDF | HTML 07 Jul 2023
    Analog Design Journal Does adaptive pre‐boost control in automotive‐lighting apps boost efficiency? 04 Oct 2018
    Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 04 Aug 2016
    Analog Design Journal Designing the front-end DC/DC conversion stage to withstand automotive transient 03 Feb 2017
    Application note Designing High Performance, Low-EMI, Automotive Power Supplies 02 Oct 2017
    White paper Trends and topologies for automotive rear lighting systems (Rev. A) 01 Oct 2019
    White paper Trends and topologies for automotive rear lighting systems (Rev. A) 01 Oct 2019

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