NCP2823 Series Audio Power Amplifier, 3.0 W, Filterless, Class D The NCP2823A/B are cost effective mono audio power amplifiers designed for portable electronic devices. NCP2823A is optimized for 8 operation and NCP2823B can operate with speaker impedance NCP2823 Series A1 A2 A3 INP AGND VOUTN B1 B2 B3 AVDD PVDD PGND C1 C2 C3 INN EN VOUTP (Top View) Figure 1. Pin Description BATTERY Cs V DD R INN R i f VOUTP RAMP GENERATOR Data CMOS Negative Processor Output Differential Stage Input VOUTN R f R INP i 300 k Shutdown Positive Control GND Differential EN Input V ih V il Figure 2. Simplified Block Diagram