EMC-Compliant Automotive Daytime Running Light and Position Light Reference Design


Design files


This reference design details a solution for an automotive daytime running light (DRL) and position light. The TPS92830-Q1 linear LED controller used in this design is directly supplied from the automotive battery, allowing you to use the same LEDs for both functions. This reference design also features good EMC performance, full protection and diagnostics.

  • Automotive Battery Supply
  • Meets CISPR 25 Conducted and Radiated Emission Standards and Passed ISO11452-4 BCI Test
  • DRL/Position Light Reuse by Using Device Internal PWM Generator
  • LED String Open Circuit, Short to Ground and Short to Battery Diagnostics With Auto Recovery
  • Fault Bus Configurable as One-Fails–All-Fail or Only-Failed-Channel-Off
  • LED Thermal Protection
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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.

TIDUD55.PDF (1944 K)

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


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

TIDCE21.ZIP (1378 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.

Automotive LED drivers

TPS92830-Q1Automotive 3-channel high-side high-power constant-current Linear LED controller

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide EMC-Compliant, Automotive Daytime Running Light and Position Light Ref Design Nov. 14, 2017

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