The LM4879 is an audio power amplifier primarily designed for demanding applications in
mobile phones and other portable communication device applications. It is capable of delivering 1.1
watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a
5VDC power supply.
Boomer audio power amplifiers were
designed specifically to provide high quality output power with a minimal amount of external
components. The LM4879 does not require output coupling capacitors or bootstrap capacitors, and
therefore is ideally suited for lower-power portable applications where minimal space and power
consumption are primary requirements.
The LM4879 features a low-power consumption global shutdown mode, which is achieved by
driving the shutdown pin with logic low. Additionally, the LM4879 features an internal thermal
shutdown protection mechanism.
The LM4879 contains advanced pop and click circuitry which eliminates noises which would
otherwise occur during turn-on and turn-off transitions.
The LM4879 is unity-gain stable and can be configured by external gain-setting resistors.
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