FeaturesBL6311 BL6503 *
_ Efficiency With an 8-_ 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 (2.5 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 DescriptionBL6311 BL6503 *
The BL6311 is a 2.5-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
BL6311 ideal for cellular handsets. In cellular handsets, the earpiece, speaker phone, and melody
ringer can each be driven by the BL6311.
ApplicationsBL6311 BL6503 *
_ Mobile phone、PDA
_ MP3/4、PMP
_ Portable electronic devices
