Headlight

Products and reference designs

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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Headlight - high resolution DLP module

Crystal Crystal Flash Flash Car battery Car battery System basis chip (SBC) System basis chip (SBC) DMD chipset DMD chipset Body control module Body control module ADAS ECU ADAS ECU High resolution DLP module High resolution DLP module Fan driver Fan driver High side switch High side switch LED driver LED driver Constant current regulator Constant current regulator Power supply Power supply Reverse voltage protection Reverse voltage protection Watchdog Watchdog Voltage regulator Voltage regulator Communication interface Communication interface CAN ESD CAN ESD CAN CAN DLP power supply DLP power supply Voltage regulator Voltage regulator MCU MCU MCU MCU High speed communication High speed communication FPD link deserializer FPD link deserializer DMD controller DMD controller DMD controller DMD controller Thermal protection Thermal protection Temp sensor Temp sensor Digital micromirror device Digital micromirror device DMD DMD DMD power supply & system management DMD power supply & system management DMD power supply DMD power supply

LED driver

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The LED driver supplies constant current to the LEDs and has circuit and LED fault detection capabilities. For high current LEDs, switching LED drivers are used in order to improve efficiency and mitigate thermal dissipation. Linear LED drivers are used for low current LEDs in order to simplify system design.

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Power management (6)
Automotive LED drivers
  • TPS929121-Q112-channel automotive 40-V high-side LED driver with FlexWire interface
    Data sheet: PDF | HTML
  • LM3409-Q142-V automotive PFET buck controller for high power LED Drives
    Data sheet: PDF | HTML
  • TLC6C5912-Q1Automotive power logic 12-bit Shift Register LED driver
    Data sheet: PDF | HTML
  • TPS92623-Q1Automotive three-channel high-side LED driver with thermal sharing
    Data sheet: PDF | HTML
  • TPS92624-Q1Automotive four-channel high-side LED driver with thermal sharing
    Data sheet: PDF | HTML
  • TPS92691-Q1Automotive multi-topology LED driver with rail-to-rail current sense amplifier
    Data sheet: PDF | HTML
  • TIDA-01381Automotive Multiple Channel Temperature Sensing for LED Headlight Reference Design
    Design guide: PDF Schematic: PDF
  • TIDA-01382Automotive Daytime Running Light (DRL) LED Driver Reference Design with Linear Thermal Foldback
    Design guide: PDF | HTML Schematic: PDF

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