BL6203* Watt Fully Differential Audio Power Amplifier

Features

?? Fully differential amplifier

?? Improved PSRR at 217Hz (VDD>3.0V) 90dB (typ)

?? Power output at 5.0V & 1% THD 1.25W (typ)

?? Power output at 3.6V & 1% THD 0.6W (typ)

?? Ultra low shutdown current 0.01μA (typ)

?? Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions

?? Thermal overload protection circuitry

?? No output coupling capacitors, bootstrap capacitors required

?? Unity-gain stable

?? External gain configuration capability

?? Available in space-saving package: 8-bump WLCSP

General Description BL6203*

The BL6203 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 8Ω 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 BL6203 ideal for wireless handsets.

The BL6203 is unity-gain stable, and the gain can be configured by external resistors.

Applications

?? Wireless handsets

?? Portable electronic devices

?? PDAs, Handheld computers