TPA2051D3

TPA2051D3 www.ti.com ..................................................................................................................................................... SLOS641A – JUNE 2009 – REVISED OCTOBER 2009 2.9 W/Channel Mono Class-D Audio Subsystem with DirectPath™ Headphone Amplifier & SpeakerGuard™ FEATURES 1 23 Mono Class-D Amp: 730 mW into 8 Ω from 3.6 V Supply (1% THD) Class-D Bypass Switches DirectPath™ Stereo Headphone Amplifier – No Output Capacitors Required SpeakerGuard™ Automatic Gain Control (AGC) One Differential Mono and Two Stereo Single-Ended Inputs 3:1 Input MUX with Mode Control 32-Step Volume Control for Both Input Channels Independent Volume Controls for All Inputs Independent Shutdown for Headphone and Class-D Amplifiers I2C™ Interface Short-Circuit and Thermal-Overload Protection Operates from 2.5 V to 5.5 V 25-Ball 2,16 mm × 2,11 mm, 0,4 mm pitch WCSP APPLICATIONS Smart Phones / Cellular Phones Portable Media Players Portable Gaming Multimedia Platforms DESCRIPTION The TPA2051D3 is an audio subsystem with a mono Class-D power amplifier, a stereo DirectPath headphone amplifier, and bypass switches. The DirectPath headphone amplifier eliminates the need for external dc-blocking output capacitors. The built-in charge pump creates a negative supply voltage for the headphone amplifier, allowing a 0 V dc bias at the output. The DirectPath headphone amplifier drives 25 mW into 16 Ω speakers from a 4.2 V supply. The ...