Automotive dual stage (SEPIC + Linear) static LED driver module reference design for rear-lights


Design files


This reference design details a solution for driving LEDs in an automotive rear-light application such as a rear combination lamp (RCL). It features linear LED drivers for different rear light light functions and the LED drivers are powered by a single ended primary inductance converter (SEPIC) LED power supply. The buck-boost SEPIC LED power supply enables operation through varying battery voltage including cold crank and the design optimizes solution size and efficiency while meeting CISPR 25 conducted and radiated emissions requirements.

  • Operation through cold crank
  • CISPR 25 class 5 compliant
  • Buck-boost operation (SEPIC)
  • Full diagnostic (open/short/single LED short)
  • Supports one-fails-all-fail
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

KOKU004A.PDF (2644 K)

Reference design overview and verified performance test data


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRXS6.ZIP (1564 K)

Files used for 3D models or 2D drawings of IC components

TIDCF15.ZIP (491 K)

Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM5155-Q12.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified

Data sheet: PDF | HTML
Automotive LED drivers

TPS92610-Q1Automotive Single-channel LED driver with 450mA output, open, short and single LED short detection.

Data sheet: PDF | HTML
Automotive LED drivers

TPS92611-Q1Automotive Single-channel LED driver with 300mA output, open and short detection

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Automotive Dual Stage (SEPIC + Linear) Static LED Driver Module Reference Design (Rev. A) PDF | HTML Nov. 01, 2022
Design guide 후미등을 위한 차량용 2상(SEPIC + 선형) 정적 LED 드라이버 모듈 레퍼런스 설계 (Rev. A) PDF | HTML Nov. 21, 2022
White paper Fundamentals to automotive LED driver circuits May 09, 2019

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