Description

Digital 2.5 W, 5.1 V, Boost Class-D Audio Amplifier with Output Sensing Features: Filterless Class-D amplifier with spread-spectrum Σ-Δ modulation with integrated boost regulator (5.1 V) Digitized output of output voltage, output current, and VBAT supply voltage Integrated boost regulator Multiple serial data formats PDM input/output TDM slave with support for up to 8 chips on a single bus I2S or left justified slave Multichip I2S with support for up to 4 chips on one I2S bus 8 kHz to 192 kHz PCM sample rates 2.048 to 6.14 MHz PDM input sample rates Configurable via I2C control, TDM control, or PDM patterns Standalone control modes 2.5 W into 4 Ω load and 1.42 W into 8 Ω load at 3.6 V supply with <1% total harmonic distortion plus noise (THD + N) Available in 19-ball, 1.74 mm × 2.1 mm, 0.4 mm pitch WLCSP 89.7% system efficiency into 8 Ω at 1 W, VBAT = 3.6 V Output noise: 21.7 μV rms, A-weighted THD + N: 0.025% at 1 kHz, 500 mW output power PSSR: 90 dB at 217 Hz, with dither input 72 dB signal-to-noise ratio (SNR) on output current sensing and 77 dB SNR on voltage sensing Quiescent power consumption: 19.8 mW Pop-and-click suppression Flexible battery monitoring AGC Short-circuit protection for boost and Class-D outputs and thermal protection with automatic recovery Smart power-down when PDM stop condition or no clock input detected DC blocking high-pass filter and static input DC protection for PDM input Selectable ultralow EMI emissions and low latency modes