Multiple Channels of High Density LED Control for Automotive Headlight Applications


Design files


This design, featuring the TMS320F2803x Piccolo microcontroller, implements a high efficiency multi-channel DC-DC LED control system for typically automotive lighting systems. The design support up to 6 channels of LED controls each with maximum of 1.2A current driving capabilities. With a  two stage power topology of boost and buck, the system can be operated with a wide input DC voltage from 8V to 20V, which fits perfectly in automotive applications.

  • Up to 6 channels of high density DC-DC LED driving capability
  • High overall efficiency of about 86% at stable maximum output
  • Wide input operation voltage range from 8V to 20V
  • Very low ripple current on each LED channel with +/- 1mA at constant output
  • Controlled and monitored via CAN communication interface with pre-defined open protocol. Easy to adapt to various end users.
  • Over voltage and over current protection. 45V load dump 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.

TIDU695.PDF (3763 K)

Reference design overview and verified performance test data

TIDRCL3.PDF (2826 K)

Detailed schematic diagram for design layout and components


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

TIDC875.ZIP (260 K)

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


Includes TI products in the design and potential alternatives.

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

UCC2813-3-Q1Automotive economy single ended 1MHz current mode PWM controller with 4.1V/3.6V UVLO 100% duty cycle

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28032C2000™ 32-bit MCU with 60 MHz, 64 KB flash, 4.6 MSPS ADC

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28032-Q1Automotive C2000™ 32-bit MCU with 60 MHz, 64 KB flash, 4.6 MSPS ADC

Data sheet: PDF | HTML
CAN transceivers

SN65HVDA541-Q1Automotive Catalog 5-V CAN Transceiver with Standby mode, I/O Level Shifting and Supply Optimization

Data sheet: PDF | HTML
General-purpose op amps

OPA4322Quad, 5.5-V, 20-MHz, 65-mA output current, low noise (8.5-nV/√Hz), RRIO operational amplifier

Data sheet: PDF | HTML
Half-bridge drivers

UCC272013-A, 120-V half bridge gate driver with 8-V UVLO and TTL inputs

Data sheet: PDF | HTML
LIN transceivers

TPIC1021Automotive LIN physical interface

Data sheet: PDF | HTML
Low-side drivers

LM51115-A/3-A dual channel gate driver with active high or low output 4-V UVLO

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

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Support software

TIDC874 Multiple Channels of High Density LED Control for Auto. Headlight Apps Software

Technical documentation

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Type Title Date
Technical article Shining a light on op amps: considerations in LED lighting PDF | HTML Oct. 20, 2016
Design guide Multiple Channels of High Density LED Ctrl for Auto Headlight Apps Design Guide Jan. 12, 2015

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