BL6312

BL6312 2.7 W/CH Stereo Filter-Free Class-D Audio Power Amplifier Features Output power: 2.7W/Ch with 4Ω loader at VDD=5V 1.5W/Ch with 8Ω loader at VDD=5V Low supply current (Typical 7mA quiescent current) Low shutdown current (Typical 0.4µA shutdown current) Thermal protection and output over current protection are designed Optimized PWM output stage eliminates LC output filter Independent shutdown control for each channel Select gain of 6, 12, 18, 24 dB Internally generated 300-kHz switching frequency eliminates capacitor and resistor Internal pull-down resistor on shutdown terminal General Description The BL6312 is a 2.7-W high efficiency, stereo, filter-free class-D audio power amplifier in QFN20 package that requires only two external components. Features like 88% efficiency, improved RF-rectification immunity make the BL6312 ideal for cellular handsets. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the BL6312. Applications Mobile phone、PDA MP3/4、PMP Portable electronic devices USB Speakers Educational toys Notebook PC http://www.belling.com.cn - Page 1 of 8 - Ver1.0 Pin Diagrams QFN20 PACKAGE (Top View) 20 19 18 17 16 BL6312 INL+ INLAGND INRINR+ 1 G1 2 VOL+ 3 PVDD 4 PGND 5 VOL- G0 15 VOR+ 14 PVDD 13 PGND 12 VOR- 11 NC SDBL SDBR AVDD NC Pin Description 6 7 8 9 10 Pin # Name 1 G1 2 VOL+ 3 PVDD 4 PGND 5 VOL- 6 NC 7 SDBL 8 SDBR 9 AVDD 10 NC 11 VOR- 12 PGND 13 PVDD 14 VOR+ 15 G0 16 INR+ 17 INR- 18 AG...