Audio Interface - LG -A120 Service Manual

3.10 Audio Interface

The ETK4992 is a fully differential audio power amplifier designed for portable communication
device applications. It is capable of delivering 1.25 watt of continuous average power to an 8. BTL
load with less than 1% distortion (THD+N) from a 5V battery voltage. It operates from 2.2 to 5.5V.
Features like 90dB PSRR at 217Hz, improved RF-rectification immunity, the space-saving
8-bump WLCSP package, the advanced pop & click circuitry, a minimal count of external
components and low-power shutdown mode make ETK4992 ideal for wireless handsets.
The ETK4992 is unity-gain stable, and the gain can be configured by external resistors.
Figure.3-10-1 Audio Interface
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