BL6311B Datasheet, PDF (1/8 Pages) SHANGHAI BELLING CO., LTD. – Improved CMRR Eliminates Two Input Coupling Capacitors

BL6311B
3 Watt Mono Filter-Free Class-D Audio Power Amplifier
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 for
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
General Description
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 handsets, the earpiece, speaker phone, and
melody ringer can each be driven by the BL6311B.
Applications
Mobile phone、PDA
MP3/4、PMP
Portable electronic devices
Pin Diagrams
http://www.belling.com.cn
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