Infineon Releases Raspberry Pi HAT with Class D Audio Amp

By Brandon Lewis


Embedded Computing Design

May 21, 2020


Driven by a MERUS MA12070P multilevel class D audio amplifier, the Raspberry Pi HAT amplifies signals with up to 40 W instantaneous peak power at 4 Ohm.

Infineon has released the KIT_40W_AMP_HAT_ZW, an HD audio Hardware Attached Top (HAT) for the Raspberry Pi Zero W, Raspberry Pi 3, and Raspberry Pi 4 driven by the MERUS MA12070P multilevel class D audio amplifier. The HAT amplifies signals with up to 40 W instantaneous peak power at 4 Ohm, and is capable of playing 24-bit audio at sample rates as high as 48 KHz. 

The onboard MERUS amplifier does not use a filter-coil at the output filter, reducing BOM cost and area. The HAT can be configured in dual-channel bridge-tied load (BTL) or single-channel parallel bridge-tied load (PBTL) modes for Multiroom, TWS, or subwoofer applications.

The KIT_40W_AMP_HAT_ZW relies solely on the 5 V/2.5 A USB power supply used by the host Raspberry Pi board. Paired with a ~6700 mAh power bank, it can provide up to 20 hours of playback time.

The KIT_40W_AMP_HAT_ZW is compatible with the Raspbian Linux distribution and streaming applications such as Volumio, moOde Audio, and JustboomPlayer.  For more information, visit

Brandon is responsible for guiding content strategy, editorial direction, and community engagement across the Embedded Computing Design ecosystem. A 10-year veteran of the electronics media industry, he enjoys covering topics ranging from development kits to cybersecurity and tech business models. Brandon received a BA in English Literature from Arizona State University, where he graduated cum laude. He can be reached at [email protected].

More from Brandon