2.5-5.2V operation

65dB PSRR at 217Hz, VDD=5V

0.1μA ultra low current shutdown mode

Improved pop & click circuitry

No output coupling capacitors, snubber networks or bootstrap capacitors required

Thermal shutdown protection

External gain configuration capability

RoHS compliant and 100% lead(Pb)-free


Mobile Phones


Portable electronic devices




           The AP4890B is an audio power amplifier designed for portable communication device applications such

           as mobile phone applications. The AP4890B is capable of delivering 1W of continuous average power to

           an 8Ω BTL and with less than 1% distortion (THD+N) from a 5.0V power supply, and 350mW to a 8Ω BTL

           load from a 3V power supply.

           The AP4890B provides high quality audio while requiring few extemal components and minimal power

           consumption. It features a low-power shutdown mode, which is achieved by driving the SHUTDOWN pin

           with logic low.

           The AP4890B contains circuitry to prevent from “pop and click” noise that would otherwise occur during

            turn-on and turn-off transitions.For maximum flexibility, the AP4890B provides an externally controlled

            gain (with resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor).