FAB3103

FAB3103 — 2.3 Watt Class-D Audio Amplifier with Integrated Boost Regulator and Automatic Gain Control July 2012 FAB3103 2.3 Watt Class-D Audio Amplifier with Integrated Boost Regulator and Automatic Gain Control Features  High Output, Low Distortion Class-D Mono Speaker Amplifier o 2.3W into 8Ω from 3.6V Supply (10% THD+N) o 1.85W into 8Ω from 3.6V Supply (1% THD+N) o 0.01% THD+N into 8Ω (100mW)  High-Efficiency Boost Regulator Provides Higher Output Power Over Li-Ion Battery Voltages o 85% Total Efficiency (3.6V, 8Ω, PO = 1.0W)  Adaptive Boost Shutdown at Lower Output Power Increases Efficiency and Reduces Quiescent Current Consumption: o IDD = 2.7mA from 3.6V Supply  Automatic Gain Control (AGC) Monitors Battery Voltage and Dynamically Adjusts Gain, Extending Battery Runtime  Reduced Noise Floor Enhances Audio Playback o 38µV Output Noise (A-Weighted) o 100dB SNR (A-Weighted)  Low-EMI Design Allows Filterless Operation  High-Power Supply Ripple Rejection: o 88dB PSRR (fRIPPLE = 217Hz, Boost Enabled) o 70dB PSRR (fRIPPLE = 217Hz, Boost Bypassed)  High Noise Rejection Using Differential Audio Inputs: o 75dB CMRR (fIN = 1kHz) o 71dB CMRR (fIN = 217Hz)  Short-Circuit Protection  Under-Voltage Protection  “Click and Pop” Suppression  Available in 12-Bump, 0.5mm Pitch, WLCSP o Space-Saving 1.86mm x 1.44mm Package Description The FAB3103 is a mono Class-D audio amplifier with an integrated boost regulator that achieves high output audio over a power supply range of...