TDA7482: Single Chip 25 Watt Mono Class-D Audio Power Amplifier

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:

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