Single channel Class D Audio Amplifier based on the very popular Class D audio amplifier controller IRS2092S. It has all protections required for a quality reliable class D amplifier, under-voltage, over-voltage over-current and over temperature protection, speaker DC component detection for fast-shut-down of SMPS, making the classic relay speaker protection redundant if is supplied from a SMPS capable of fast-shutdown by external trigger, such as any of the RxE SMPS series. It has Mute and ON LED’s to indicate the status of the amplifier, mute control pin and DC detection for fast shut-down of power supply. For basic operation, all the voltages required for amplifier operation are obtained on board, and requires only one differential supply voltage in range of +-56 to +-70V. Output power 400W min. on 4R impedance supplied with +-60V from a regulated SMPS or +-65V from unregulated SMPS or classic linear supply. The PCB board weighs under 200 grams and the size is 60x70mm and less than 30mm tall from the board to the top of the inductor. The CxD400 current version is sold with a H shaped heat transfer plate which allows easier installation on a larger heatsink able to dissipate approx. 25-30W of power. The overall size of the aluminum mounting plate is 60x90mm by 3mm thick and has 4 threaded M4 mounting holes on the corners spaced at 50x80mm distance. Total height including the baseplate is under 40mm, allowing installation into 1RU or other low-profile enclosures. In most cases the amplifier aluminum chassis baseplate or side mounted heatsinks are suitable if can provide a thermal resistance of 3*C/W or better. Idle power dissipation is around 6-7W supplied at +-63V.
Suitable power supply: for single channel, SMPS500RxE +-60V and for dual channel, SMPS800RE +-60V. SMPS2000RxE +-60V can supply up to 6CxD400 amplifier channels.