BL6211

BL6211 1.25 Watt Fully Differential Audio Power Amplifier With Internal Feedback Resistors 1 FEATURES Fully differential amplifier Improved PSRR at 217Hz(VDD>3.0V) 86dB (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 0.01 A (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: 9-bump micro SMD and 8-pin MSOP8 2 GENERAL DESCRIPTION The BL6211 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 86dB PSRR at 217Hz, improved RF-rectification immunity, the space-saving 8-pin MSOP8 and 9-bump micro SMD package, the advanced pop & click circuitry, a minimal count of external components and low-power shutdown mode make BL6211 ideal for wireless handsets. The BL6211 is unity-gain stable, and the gain can be configured by external input resistors and internal feedback resistors. 3 APPLICATIONS Wireless handsets Portable audio devices PDAs, Handheld computers http://www.belling.com.cn 4 TYPICAL APPLICATION BL6211 Differential Audio I...