Hi-Fi Headphone Amplifier Power Supply Reference Design
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Key Document


Headphone amplifiers usually require positive and negative voltages. In this reference design, both voltages are generated from a single input voltage with an integrated split-rail charge-pump converter. It provides small solution size with five capacitors and four resistors.

  • Small solution size
  • Low distortion
  • Small BOM - only nine external components
  • Adjustable output voltage
  • Tested circuit design; test report and design files are included

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM27762  Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
OPA1622  SoundPlus™ Audio Operational Amplifier with High Performance, Low THD+N and Bipolar Input  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM27762 Download Download
OPA1622 Download Download

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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 389 06 Jan 2017
Design files (6)
Title Type Size (KB) Date
ZIP 655 09 Feb 2017
ZIP 938 09 Feb 2017
PDF 120 09 Feb 2017
PDF 309 09 Feb 2017
PDF 60 09 Feb 2017
PDF 286 09 Feb 2017
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Small, High-Efficiency Split-Rail Supply Reference Design for Portable Audio Applications  PMP9781  Reference design 

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