140mW Headphone Amplifier with Unity-gain Stable

PublishTime： 2021-08-04 Article Source：LowPowerSemi

LowPowerSemi's LPA4809 is a dual audio power amplifier capable of delivering 140mW per channel of continuous average power into a 16Ω load with 0.1 %(THD+N) from a 5V power supply. Boomer audio power amplifier was designed specifically to provide high-quality output power with a minimal amount of external components. Since the LPA4809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The unity-gain stable LPA4809 can be configured by the external gain setting resistors. The LPA4809 features an externally controlled, active-low, micropower consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.

Features

THD+N at 1KHz at 140mW continuous average power into 16Ω 0.1%

THD+N at 1KHz at 80mW continuous average power into 32Ω 0.1%

Shutdown Current 0.4μA

Active-low shutdown mode

"Click and Pop" reduction circuitry

Low shutdown current

MSOP8 surface-mount packaging

No bootstrap capacitors required

Unity-gain stable

Applications

Headphone Amplifier

Microphone Preamplifier

Personal Computers

PDA's

Order Information

Typical Application Circuit

【Datasheet】LPA4809 140mW Headphone Amplifier with Unity-gain Stable Preliminary Datasheet

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Integrated Circuits