Automotive Multiple Channel Temperature Sensing for LED Headlight Reference Design
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Key Document


The TIDA-01381 TI Design details a solution on how to drive a string of matrix LED headlights, measure the temperature of the LEDs, and implement support for thermal foldback, which reduces the current in the LEDs as the LED temperature rises to prevent damage to the LEDs. The design uses TI temperature sensing solutions instead of negative temperature coefficient (NTC) thermistors in order to reduce the number of components, number of physical wires, and reduce number of pins used on microcontroller. This TI Design should be interfaced with a microcontroller to do the thermal foldback current derating of the LEDs. The input stage of the design includes electromagnetic interference (EMI) and electromagnetic compatibility (EMC) filters and can be directly supplied by a car battery.

  • Multiple channel temperature sensing
  • Efficiency-optimized design
  • Operation through cold crank
  • Load dump tolerant
  • Reverse battery protection
  • Thermal foldback

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TMP423-Q1  AEC-Q100 Automotive 3Ch Remote Temperature Sensor  Temperature sensors  Sample & Buy Not Available
TPS92691-Q1  Automotive multi-topology LED driver with rail-to-rail current sense amplifier  LED drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TMP423-Q1 Download -
TPS92691-Q1 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 751 03 Mar 2017
Design files (6)
Title Type Size (KB) Date
ZIP 507 16 Feb 2017
ZIP 768 16 Feb 2017
PDF 1129 16 Feb 2017
PDF 226 16 Feb 2017
PDF 71 16 Feb 2017
PDF 348 16 Feb 2017

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