Infineon Releases Raspberry Pi HAT with Class D Audio Amp

May 21, 2020 Brandon Lewis

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

About the Author

Brandon Lewis

Brandon Lewis, Editor-in-Chief of Embedded Computing Design, is responsible for guiding the property's content strategy, editorial direction, and engineering community engagement, which includes IoT Design, Automotive Embedded Systems, the Power Page, Industrial AI & Machine Learning, and other publications. As an experienced technical journalist, editor, and reporter with an aptitude for identifying key technologies, products, and market trends in the embedded technology sector, he enjoys covering topics that range from development kits and tools to cyber security and technology business models. Brandon received a BA in English Literature from Arizona State University, where he graduated cum laude. He can be reached by email at

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