170 Watt Class D Audio Power Amplifier with LM4651 and LM4652

170 Watt Class D Audio Power Amplifier with LM4651 and LM4652

























Description
The IC combination of the LM4651 driver and the LM4652 power MOSFET provides a high efficiency, Class D Amplifier solution.
This circuit is ideal for car booster amplifier, active speaker/subwofer, home theater, or PC’s multimedia sound system.

The maximum efficiency 85% is obtained at 125W power output condition। The total harmonics distortion is 10% at full power output of 170W। For better fidelity, the THD at 10W is only 0।3% for 10-500Hz input signal driving 4 ohm speaker
  • Conventional pulse width modulation
  • Turn-on soft start and under voltage lockout
  • 50kHZ to 200kHz switching frequency range
  • Externally controllable switching frequency
  • Integrated error amp and feedback amp
  • 15 Lead TO220 isolated package
  • Self checking protection diagnostic
  • Over modulation protection (soft clipping)
  • Short circuit current limiting and thermal shutdown protection.

    The power supply voltage cannot exceed (+-) 22V, and also, the output stage will be turned off when the supply voltage drops under 10.5V to prevent under-voltage failure both for the circuit and for the battery (if implemented for car audio application).