High-Current SEPIC Reference Design for Automotive Lighting and ADAS Systems
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Key Document


This reference design is ideal for high-current pulse operation of IR LEDs at up to 3A for automotive ADAS systems. It is capable of continuous and pulsed operation even through load dump and warm crank events. Other features include analog dimming and CISPR-25 class 3 EMI filtering.

  • Optimized for Infrared LEDs and Other High-Current LED Lighting Applications
  • CISPR-25 Tested EMI
  • Analog and PWM Dimming
  • Operation Through Warm Crank and Load Dump

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Schematic/Block Diagram

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Test Data

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Design Files

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(Output Voltage 1)
Vin (Min) (V)8
Vin (Max) (V)16
Vout (Nom) (V)12
Iout (Max) (A)3
Output Power (W)36
Input TypeDC
TopologySepic- CCM

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
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)
TPS92691-Q1 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 3994 16 Nov 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1755 16 Nov 2017
ZIP 538 16 Nov 2017
PDF 611 16 Nov 2017
PDF 89 16 Nov 2017
PDF 55 16 Nov 2017
PDF 174 16 Nov 2017
Related Tools & Software

Hardware development (2)

Name Part Number Tool Type
TPS92691 SEPIC LED Driver Evaluation Board  TPS92691EVM-001  Evaluation boards 
TPS92691-Q1 Boost and Boost-to-Battery LED Driver Evaluation Board  TPS92691EVM-752  Evaluation boards 

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