Stereo Audio Amplifier w/ Adjustable External Gain Evaluation Board

Overview

The NCP2809B is a cost-effective fixed gain stereo audio power amplifier capable of delivering 135 mW of continuous average power per channel into 16 ohm loads. This device has been specifically designed to provide high quality output power from low supply voltage, requiring very few external components. The device incorporates a proprietary virtual ground circuit which allows the speakers to be directly connected to the amplifier without the need for bulky DC blocking capacitors.

Since NCP2809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The NCP2809B has adjustable gain by means of external resistors.

  • 135 mW to a 16 ohm Load from a 5.0 V Power Supply
  • Excellent PSRR (85 dB Typical): Direct Connection to the Battery
  • Pop and Click Noise Protection Circuit
  • Ultra Low Current Shutdown Mode
  • 2.2 V-5.5 V Operation
  • Outstanding Total Harmonic Distortion + Noise (THD+N): < 0.01%
  • Thermal Overload Protection Circuitry

Evaluation/Development Tools

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Ref. Design

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Part Used

Action

Stereo Audio Amplifier w/ Adjustable External Gain Evaluation Board

Evaluation Board

No

Active

$90

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Technical Documentation

Name / Description

Document Type

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NCP2809BGEVB_SCHEMATIC.PDF

0

Eval Board: Schematic

21.5 KB

EN

Eval Board: Schematic

July 16, 2009

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NCP2809BGEVB_GERBER.ZIP

0

Eval Board: Gerber

67.58 KB

EN

Eval Board: Gerber

July 16, 2009

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NCP2809BGEVB_TEST_PROCEDURE.PDF

0

Eval Board: Test Procedure

34.82 KB

EN

Eval Board: Test Procedure

July 16, 2009

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NCP2809BGEVB_BOM_ROHS.PDF

2

Eval Board: BOM

64.51 KB

EN

Eval Board: BOM

September 13, 2013

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