TCS7191B

GENERAL DESCRIPTION The TCS7191B is a 2.8W high efficiency, non-clip, filterless, Class-D audio power amplifier. It operates from 2.7V to 5.5V supply. When powered with 5V supply voltage, the TCS7191B is capable of delivering 2.8W into 4Ω load or 1.65W into 8Ω load, with THD+D less than 10%. The TCS7191B features a non-clip output control, which detects the output clipping caused by the over-level input signal and automatically adjusts the dynamic range of the output signal to prevent the distortion of the audio signal. The non-clip output control also eliminates the output clipping due to a low battery supply voltage. As a Class-D power amplifier, the TCS7191B features high efficiency, up to 90%, and high PSRR, 75dB at 217Hz, which make the device ideal for use in battery-powered portable devices. It also features minimized click-and-pop noise during turn-on and turn-off transitions. APPLICATIONS  Cellular handsets  Portable navigation devices  Multimedia internet devices APPLICATION CIRCUIT TCS7191B 2.8W Non-Clip Class-D Audio Power Amplifier FEATURES  Non-clip control to suppress output clipping  Filterless Class-D operation  High efficiency up to 90%  Output power at 5V supply 1.65W (8Ω load, 10% THD+N) 1.35W (8Ω load, 1% THD+N) 2.8W (4Ω load, 10% THD+N) 2.25W (4Ω load, 1% THD+N)  Low THD+N: 0.1% (typical) @ 1KHz (VDD=3.6V, RL=4Ω, PO=0.65W)  Low quiescent current: 2.2mA @ VDD=3.6V (8Ω load)  Low shutdown current: 0.1μA (typical)  High PSRR: 75dB (typical)  Tw...