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


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

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(Output Voltage 1)
Vin (Min) (V)6
Vin (Max) (V)18
Vout (Nom) (V)24
Iout (Max) (A)1
Output Power (W)24
Input TypeDC
TopologyBoost- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA213-Q1  AEC-Q100, 26V, bi-directional, high-precision current sense amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM3481-Q1  48V Wide Vin High-Efficiency Controller for Boost, SEPIC and Flyback DC-DC Converters  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA213-Q1 Download Download
LM3481-Q1 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 3388 18 Aug 2017
Design files (5)
Title Type Size (KB) Date
ZIP 1151 18 Aug 2016
ZIP 39760 18 Aug 2016
PDF 126 18 Aug 2016
PDF 212 18 Aug 2016
PDF 394 18 Aug 2016

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