CISPR25 Tested Automotive Tail Light Reference Design for Step-Up + Linear LED Driver Based Systems


Design files


TIDA-00678 showcases an automotive LED tail light application (tail/stop, turn and reverse) by using TPS92630-Q1 linear LED driver powered by an upstream boost converter (TPS40210-Q1) which is directly supplied through a smart-reverse battery diode off the automotive battery voltage. The design includes EMI/EMC radiation and pulse tests conducted by CISPR25 and ISO 7637-2 and highlights potential cost savings and efficiency (power dissipation, system thermals). For a similar design with TPS92630-Q1 driven by a buck converter, see TIDA-00677.

For a similar design with  TPS92630-Q1 driven directly from a car battery, see TIDA-00679.

  • Efficiency-optimized design
  • Load-dump tolerant
  • Operation through cold crank
  • Smart-reverse battery protection
  • CISPR-25 tested EMI/EMC
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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.

TIDUBP2A.PDF (10894 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

TIDCC82.ZIP (520 K)

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

TIDRLZ7.PDF (2075 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Automotive LED drivers

TPS92630-Q1Automotive Three-channel Linear LED driver with Analog and PWM dimming

Data sheet: PDF | HTML
AC/DC & DC/DC controllers (external FET)

TPS40210-Q14.5-V to 52-V wide input range current mode boost controller with 700-mV reference voltage

Data sheet: PDF | HTML

LMV7239-Q1Automotive-grade, micropower, 75-ns, single rail-to-rail comparator

Data sheet: PDF
Ideal diode/ORing controllers

LM74610-Q10.48-V to 42-V, zero IQ automotive ideal diode controller

Data sheet: PDF | HTML

CSD18531Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.6 mOhm

Data sheet: PDF | HTML

CSD85301Q220-V, N channel NexFET™ power MOSFET, dual SON 2 mm x 2 mm, 27 mOhm, gate ESD protection

Data sheet: PDF | HTML
Noninverting buffers & drivers

SN74LVC1G07-Q1Automotive single 1.65-V to 5.5-V buffer with open-drain outputs

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide CISPR25 Tested Automative Tail Light Step-Up and Linear LED Driver Design Guide (Rev. A) Sep. 14, 2016

Related design resources

Reference designs

TIDA-00677 CISPR25 Automotive Tail Light Reference Design for Step-Down + Linear LED Driver Based Systems TIDA-00679 Linear LED Driver Reference Design for Automotive Lighting Applications

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