140mW Headphone Amplifier with Unity-gain Stable
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
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