PAM8905

A Product Line of Diodes Incorporated 1.9W Class-D Audio Amplifier with Integrated Boost Converter and Battery Tracking AGC PAM8905 Description Pin Assignments The PAM8905 is a high efficiency Class-D audio power amplifier with an integrated boost converter. It drives up to 1.9W (1% THD+N) into an 8Ω speaker. With 85% typical efficiency, the PAM8905 helps extend battery life when playing audio. 12 3 A PVDD SW BGND The built-in boost converter generates the voltage rail for the output stage. This provides a louder audio output than a stand-alone amplifier connected directly to the battery. It also maintains a consistent loudness, regardless of battery voltage. The PAM8905 features battery tracking AGC function which adjusts the Class-D gain to limit battery current at lower battery voltage. B OUT+ AGC VBAT C OUT- EN IN+ D PGND AGND IN- (TOP VIEW) PAM8905 features DC input protection and all outputs are fully protected against output-to-output shorts. The PAM8905 is available in U-WLB1520-12 package. Features  Built-In Battery Tracking Automatic Gain Control (AGC)  High Efficiency Integrated Boost Converter Over 85%  1.9W into an 8Ω Load from a 3.6V Supply  Operates from 2.8V to 5.2V  Efficient Class-D Prolongs Battery Life  Minimized ON/OFF Pop Noise  Superior Low Noise  High PSRR  DC Input Protection  Auto-Recovery Short-Circuit Protection  Thermal Shutdown  Available in U-WLB1520-12 Package Applications  Cell Phones  PDA  GPS  Portable Elec...