TDA8920BTH 200 watts d class amplifier circuit diagram
This high power 200 watts amplifier circuit electronic project is designed using the TDA8920BTH audio power amplifier IC .
This 200 watts amplifier circuit has a very high efficiency with very low dissipation, providing a very high output power. The typical output power is 200 watts ( 2 x 100 W) .
The TDA8920BTH 200 watts amplifier circuit operates over a wide supply voltage range from ±12.5 V to ±30 V (±32 V non operating) and consumes a very low quiescent current.
If the supply voltage drops below ±12.5 V, the UnderVoltage Protection (UVP) circuit is activated and the system will shut-down correctly.
The audio input signal of this 200 watts d class amplifier is converted into a digital pulse width modulated signal via an analog input stage and Pulse Width Modulation (PWM) modulator. To enable the output power transistors to be driven, this digital PWM signal is applied to a control and handshake block and driver circuits for both the high side and low side.
The amplifier system can be switched to one of three operating modes by pin MODE:
-Standby mode; with a very low supply current
-Mute mode; the amplifiers are operational; but the audio signal at the output is suppressed by disabling the VI-converter input stages
-Operating mode; the amplifiers are fully operational with output signal