High Brightness Single LED Driver Reference Design for 1- to 2-Cell AA Battery Applications
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Key Document


This reference design delivers a high efficiency LED driver circuit with dimming function using the boost converter TPS61021A. The PWM dimming method can be used in one or two cell AA battery input applications, and the analog dimming method can be used in one cell AA battery input applications. PMP15037 can realize the dimming function through the addition of several resistors and one MOSFET into the circuit, making it an cost-effective and high efficiency solution for LED driver applications.

  • One Cell or Two Cell AA Battery Input Voltage Range
  • Supports 0.5A Output Current for One Cell AA Battery Applications and Supports 1A Output Current for Two Cell AA Battery Applications
  • Isolate the Input Battery from the Output Side when Shut Down
  • High Efficiency and Small Solution Size

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Design Files

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(Output Voltage 1)
Vin (Min) (V)1
Vin (Max) (V)3
Vout (Nom) (V)3.3
Iout (Max) (A).5
Output Power (W)1.65
Input TypeDC
TopologyBoost- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS61021A  3-A Boost Converter with 0.5-V Ultra Low Input Voltage  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS61021A Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 289 06 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1096 06 Dec 2017
ZIP 521 06 Dec 2017
PDF 474 06 Dec 2017
PDF 77 06 Dec 2017
PDF 32 06 Dec 2017
PDF 134 06 Dec 2017

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