Infineon Technologies AG has developed what it claims is the first fully self-contained Raspberry Pi audio amplifier hardware attached on top (HAT) board.
The multilevel technology uses state-of-the-art power efficiency and high definition audio quality for Raspberry Pi users in the target field of use for active speakers with wireless music streaming.
The board, called KIT_40W_AMP_HAT_ZW, is compatible with the Raspberry Pi Zero W and Raspberry Pi 3 and 4. The board includes the MERUS multilevel class D amplification enabled by the MERUS MA12070P amplifier that allows for filter-free amplifier design that does not need a filter-coil at the output filter.
Infineon said the board significantly reduces the bill of materials (BOM) and printed circuit board (PCB) area and includes a high output power in small form factor up to 40 W instantaneous peak power at 4 ohms. The board allows for a playback time up to 20 hours with a ~6700 mAh power bank and requires no need for additional power supplies as it only needs a single 5 V/2.5 A USB power supply.
