AP4890B

http://www.aplusinc.com.tw

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Tel : 886-2-2782-9266

Ver1.2

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1. DESCRIPTION

:

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).

2. FEATURE :

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

APPLICATIONS

Mobile Phones

PDAs

Portable electronic devices