BL6311B 3 Watt Mono Filter-Free Class-D Audio Power Amplifier

BL6311B 3 Watt Mono Filter-Free Class-D Audio Power Amplifier

The BL6311B is a 3-W high efficiency filter-free class-D audio power amplifier in a wafer chip scale package (WCSP) that requires only three external components. Features like 88% efficiency, −75dB PSRR, and improved RF-rectification immunity make the BL6311B ideal for cellular handsets. In cellular.

Features

Efficiency With an 8-Ω Speaker: 88% at 400 mW 80% at 100 mW 2.6mA Quiescent Current 0.4µA Shutdown Current Optimized PWM Output Stage Eliminates LC Output Filter Internally Generated 250-kHz Switching Frequency Eliminates Capacitor and Resistor Improved PSRR (−75 dB) and Wide Supply Voltage (2.8 V to 5.5 V) Eliminates Need a Voltage Regulator Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor Improved CMRR Eliminates Two Input Coupling Capacitors Available in space-saving package: 9-bump WLCSP for General Description The BL6311B is a 3-W high efficiency filter.