GENERAL DESCRIPTION
The SSM4567 is a digital input Class-D power amplifier that includes an integrated boost converter, allowing higher output power than with a normal battery supply. This means that maximum output power is constant across the battery voltage range. The SSM4567 is ideal for power sensitive applications where system noise can corrupt the small analog signal sent to the amplifier, such as mobile phones, tablets, and portable media players.

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

APPLICATIONS
   Mobile handsets
   Tablets
   Portable media players