This class-D audio power amplifier is suitable for TV and home stereo set. TDA7882 IC chip provides class-D audio power amplifier solution. Since this chip has only mono channel, you need two pieces of this circuit for stereo application. The power supply voltage is flexible, accept (+-)10V to (+-)25V. This circuit needs a split supply (symmetric power supply). Here are the main features of this class-D amplifier:

  • 25W OUTPUT POWER: RL = 8 ohm/4 ohm; THD = 10%
  • HIGH EFFICIENCY
  • WIDE SUPPLY VOLTAGE RANGE (UP TO ±25V)
  • SPLIT SUPPLY
  • OVER-VOLTAGE PROTECTION
  • ST-BY AND MUTE FEATURES
  • SHORT CIRCUIT PROTECTION
  • THERMAL OVERLOAD PROTECTION

Here is the schematic diagram of this class-D amplifier circuit:

25w class d amplifier circuit schematic

[Circuit’s schematic diagram source: ST Microelectronics TDA7482 Data Sheet]