Precision PWM Dimming LED Driver Reference Design for Automotive Lighting

(ACTIVE) TIDA-01183

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Key Document

Description

The TIDA-01183 TI Design details a solution on how to use pulse width modulation (PWM) to dim an automotive headlight or tail light with a precision of better than 2% duty cycle without the necessity of using a micro controller. This allows the design to be very cost competitive. Devices used in this design are the TPS92691-Q1 multi-topology LED Driver in boost and boost to battery configuration controlling the LEDs.  The TLC555-Q1 LinCMOS timer, together with the OPA2377-Q1 operational amplifier, measure and generate an accurate PWM signal by applying a feedback loop and a precision shunt regulator for setting the duty cycle accurately. The designs input stage is EMI/EMC filtered and can be directly supplied by the cars battery.

Features
  • Precisioin PWM dimming
  • Efficiency-optimized design
  • Operation through cold crank
  • Load dump tolerant

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA2377-Q1  Automotive-Qualified, Rail-to-Rail In/Out, Low Noise, 5MHz CMOS Operational Amplifier  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
TL431A-Q1  Automotive Catalog Adjustable Precision Shunt Regulators  Voltage Reference  Sample & Buy Not Available
TLC555-Q1  Automotive LinCMOS TIMER  Clock and Timing  Sample & Buy View Design Kits & Evaluation Modules
TPS92691-Q1  TPS92691 Multi-Topology LED Driver with Rail-to-Rail Current Sense Amplifier  LED Driver  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 3158 12 Jan 2017 573
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 442 02 Nov 2016 30
ZIP 791 02 Nov 2016 23
PDF 1160 02 Nov 2016 26
PDF 302 02 Nov 2016 13
PDF 76 02 Nov 2016 41
PDF 457 02 Nov 2016 190


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