Automotive LED headlight driver module for halogen replacement reference design
TIDA-050040
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Key Document

Description

This reference design showcases the TPS92682 and the TPS92520 as a fully self functional three-channel LED driver for headlight applications.  The design is intended to be a low-cost halogen headlight module replacement compatible with an automotive body control module.  The three LED channels drive highbeam/lowbeam, turn indicator and daytime running light, and position marker light.  The design uses one TPS92682 dual channel controller as a constant voltage boost and a constant current SEPIC.  It also uses one TPS92520 supplied by the boost for two synchronous rectified constant current buck converters. The board is designed with ground strip to allow enclosing the power stages for EMI compliance which includes CISPR 25 Class 5 conducted test results.

Features
  • Two stage constant voltage boost converter supplying two synchronous buck converters for highbeam/lowbeam and turn indicator
  • Supplying two synchronous buck converters for
  • Highbeam/lowbeam and turn indicator
  • SEPIC converter for day time running light and position marker light
  • Compatible with power supplied from body control module
  • Highbeam/lowbeam and turn indicator single LED short, output short and open string detection for fault reporting and disabling
  • Reverse battery protection

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM26420-Q1  Dual 2 A, automotive-qualified, high-efficiency synchronous DC/DC converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
MSP432E401Y  SimpleLinkā„¢ 32-bit Arm Cortex-M4F MCU with ethernet, CAN, 1MB Flash and 256kB RAM  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TLIN1029-Q1  Local interconnect network (LIN) transceiver with dominant state timeout  Interface  Sample & Buy View Design Kits & Evaluation Modules
TPS57160-Q1  Automotive 3.5V to 60V, 1.5A Buck Converter with Eco-Mode™  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS92520-Q1  1.6-A dual synchronous buck LED driver with SPI   LED drivers  Sample & Buy View Design Kits & Evaluation Modules
TPS92682-Q1  Dual channel constant-Voltage and constant current controller with SPI  LED drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM26420-Q1 Download Download
Download Download
MSP432E401Y Download Download
TLIN1029-Q1 Download Download
Download Download
TPS57160-Q1 Download Download
Download Download
TPS92520-Q1 Download Download
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TPS92682-Q1 Download
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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 14211 28 Jul 2020
Design files (6)
Title Type Size (KB) Date
ZIP 680 28 Jul 2020
ZIP 4777 28 Jul 2020
PDF 2050 28 Jul 2020
PDF 518 28 Jul 2020
PDF 148 28 Jul 2020
PDF 569 28 Jul 2020
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
45-W, 15-W dual SEPIC LED driver reference design for automotive lighting  TIDA-050029  Reference design 

Hardware development (2)

Name Part Number Tool Type
TPS92682-Q1 Constant voltage 2-phase boost evaluation module  TPS92682EVM-069  Evaluation boards 
TPS92682-Q1 constant current 2-channel boost and boost-to-battery evaluation module  TPS92682EVM-070  Evaluation boards 

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