●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
◆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).