Class-D Audio Amplifiers with Wide Supply Range and High Switching Rates

Texas Instruments has introduced
three analog-input class-D stereo
amplifiers for use in soundbars, after-
market automotive solutions, portable
audio docks, and LCD televisions. The
TPA3116D2, TPA3118D2 and
TPA3130D2 feature the industry's
highest programmable switching rate
and widest power supply range,
enabling audio output that is both
high quality and highly efficient. The
devices are pin-to-pin and software
compatible and can support a single-
layer printed circuit board (PCB),
enabling cost savings by allowing
designers to reuse a single layout for
multiple designs.
Key features and benefits of the
TPA3116D2, TPA3118D2 and
TPA3130D2:

• Supply range of 4.5 V to 26 V
  enables simultaneous operation of
  line power and battery power on
  the same board for longer battery
  life in soundbars and portable
  audio docks.
  
• Thermally efficient FETs allow 30 W
  x 2 operation without the need for
  a heat sink, or 50 W x 2 with a heat
  sink (TPA3116D2 only).
  
• Programmable switching rates of
  400 KHz to 1.2 MHz allow inductor
  filter-free operation and
  interference avoidance for clear
  audio with no distortions.
  
• Closed-loop design provides
  excellent power supply rejection
  ratio (PSRR) and slower edge rates
  for waveform switching to improve
  electromagnetic interference (EMI)
  performance.
  
• RDS(on) of 120 milliohms at 30 W x
  2 improves efficiency by decreasing
  resistance during operation.

Source: Elektro Projects