11W Automotive LED Lighting Driver Reference Design
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Key Document


PMP20305 is an LED driver circuit reference design using the LM5022-Q1 boost controller IC and two types of constant-current methods to drive 4 strings of LEDs. Two of the LED strings utilize the TL431 voltage reference as a driver to perform a constant current source, while the other two strings utilize the TL4242 linear LED driver IC, which also features a PWM-controlled brightness adjust scheme. The input voltage range of the circuit is 6Vin to 16Vin (24Vin Peak). The output of the LM5022-Q1 boost converter is set to 26.9Vout and is capable of supplying a total of 0.4A of current to the loads.

  • 2MHz switching to bypass AM band
  • PWM dimming capability
  • Simple standalone design

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(Output Voltage 1)
Vin (Min) (V)6
Vin (Max) (V)16
Vout (Nom) (V)26.9
Iout (Max) (A).4
Output Power (W)10.76
Input TypeDC
TopologyBoost- Non Sync

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5022-Q1  6-60V Wide Vin, current mode boost, SEPIC and Flyback controller, AEC-Q100 qualified  Step-up (boost) regulators  Sample & Buy Not Available
TL4242-Q1  Automotive adjustable LED driver  LED drivers  Sample & Buy View Design Kits & Evaluation Modules
TL431-Q1  Automotive adjustable precision shunt regulator (pin layout: KRA)  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5022-Q1 Download Download
TL4242-Q1 Download -
Download -
TL431-Q1 Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 963 07 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 437 07 Dec 2017
ZIP 684 07 Dec 2017
PDF 1174 07 Dec 2017
PDF 166 07 Dec 2017
PDF 35 07 Dec 2017
PDF 213 07 Dec 2017

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