24W Boost and Boost-to-Battery Reference Design for Automotive LED Lighting


Design files


TIDA-01234 is a 24W, high-efficiency (94%), low cost, Asynchronous boost design for automotive LED application based on LM3481-Q1.
This design applies to automotive high brightness lighting such as headlights and taillights and also interior LED lighting systems. It is designed to operate with an input range from 6Vin to 18Vin and can drive multiple strings of 6 to 7 LEDS (16V to 24V) in series at 1A constant current. The design support analog LED brightness control and output open protection. In Boost-to-Battery configuration, input voltage can either be higher, lower or equal to required LED strings voltage.

  • 24W Automotive LED Driver Solution
  • 94% System efficiency @full load at 12Vin for Boost; 88.9% System efficiency @full load at 12Vin for Boost to Battery
  • Open Circuit Protection
  • Switching Frequency:  350kHz
Output voltage options TIDA-01234.1
Vin (Min) (V) 6
Vin (Max) (V) 18
Vout (Nom) (V) 24
Iout (Max) (A) 1
Output Power (W) 24
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Non Sync
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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.

TIDUC83A.PDF (3388 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Detailed schematic diagram for design layout and components


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

TIDRNB8.ZIP (39760 K)

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

TIDCCK1.ZIP (1151 K)

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


Includes TI products in the design and potential alternatives.

Analog current-sense amplifiers

INA213-Q1AEC-Q100, 26V, bi-directional, high-precision current sense amplifier

Data sheet: PDF | HTML
Boost controllers (external switch)

LM3481-Q12.97-V to 48-V high-efficiency controller for boost, SEPIC and flyback, AEC-Q100 qualified

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 24-W Boost and Boost-to-Battery Reference Design for Automotive LED Lighting (Rev. A) Aug. 18, 2017
Technical article Create a 24W power supply for automotive LED lighting systems Oct. 14, 2016

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