FAB3103 Datasheet | Fairchild Semiconductor

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 (100m W) - 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 = 2.7m A 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 100d B SNR (A-Weighted) - Low-EMI Design Allows Filterless Operation - High-Power Supply Ripple Rejection: o 88d B PSRR (f RIPPLE = 217Hz, Boost Enabled) o 70d B PSRR (f RIPPLE = 217Hz, Boost Bypassed) - High Noise Rejection Using Differential Audio Inputs: o 75d B CMRR (f IN = 1k Hz) o 71d B CMRR (f IN = 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 2.5V to 5.2V. Automatic Boost Shutdown dynamically shuts down the boost regulator at low output power for greater efficiency and lower quiescent current consumption. Automatic Gain Control (AGC) monitors the battery and reduces gain as the battery voltage drops to limit maximum current consumption, extending battery runtime and preventing mobile device shutdown. Applications - Smart Phones, Feature Phones - Tablets, Portable Gaming Devices - GPS, Active Speakers Figure 1. Typical Application Circuit Ordering Information Part Number Operating Temperature Range FAB3103UCX -40°C to +85°C Package 12-Bump, 0.5mm Pitch, Wafer-Level Chip-Scale Package (WLCSP) Packing Method 3000 Units on Tape & Reel ©...