BL6203

BL6203 1.25 Watt Fully Differential Audio Power Amplifier 1 FEATURES z Fully differential amplifier z Improved PSRR at 217Hz (VDD>3.0V) 90dB (typ) z Power output at 5.0V & 1% THD 1.25W (typ) z Power output at 3.6V & 1% THD 0.6W (typ) z Ultra low shutdown current 0.01µA (typ) z Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions z Thermal overload protection circuitry z No output coupling capacitors, bootstrap capacitors required z Unity-gain stable z External gain configuration capability z Available in space-saving package: 8-bump micro SMD 2 GENERAL DESCRIPTION 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 micro SMD 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. 3 APPLICATIONS z Wireless handsets z Portable audio devices z PDAs, Handheld computers http://www.belling.com.cn 4 TYPICAL APPLICATION BL6203 20kΩ Rf Differential Audio Input INVIH VIL IN+ 20kΩ Ri C B 1μF C B is optional Ri 20kΩ CS 1...