PMP9781

Small, High-Efficiency Split-Rail Supply Reference Design for Portable Audio Applications

PMP9781

Design files

Overview

Differential Headphone amplifiers require positive and negative voltages. In this reference design, both voltages are generated from a single input voltage with an all integrated split-rail converter. It only requires one inductor and a minimal amount of external components to achieve a high efficiency power supply that keeps the distortion of the system very low. End users benefit from High Fidelity audio performances with longer playback time in their mobile application.

Features
  • 90% Peak Efficiency
  • Tiny solution size: 5.9x6.9 mm
  • Low Distortion: THD+N < 0.00075%
  • Programmable outputs
  • Small BOM — only 7 external components required
  • This circuit design is tested. All necessary software, a Test Report and a Design File are included.
Output voltage options PMP9781.1
Vin (Min) (V) 2.5
Vin (Max) (V) 5.5
Vout (Nom) (V) 5
Iout (Max) (A) .04
Output Power (W) .2
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous^Linear Regulator

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.

TIDRGB9.PDF (112 K)

Detailed schematic diagram for design layout and components

TIDRGC0.PDF (16 K)

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

TIDCAQ5.ZIP (436 K)

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

TIDRGC1.PDF (554 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Audio op amps

OPA1612SoundPlus™ Audio Operational Amplifier with 1.1nV/√Hz Noise, Low THD and Precision

Data sheet document-pdfAcrobat PDF open-in-new HTML
LCD & OLED display power & drivers

TPS65132Split-Rail, Single Inductor Dual Output Converter with Positive and Negative Outputs

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Application note Small High-Efficiency Split-Rail Supply for Portable Audio Applications Jun. 02, 2015

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