Sunday, April 21, 2024

Raspberry Pi-Based Class-D Audio Amplifier By Infineon

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  • Available in compact size yet power efficient and offers HD audio quality
  • Compatible with Raspberry Pi Zero W and Raspberry Pi 3 and 4

Infineon Technologies has developed a fully self-contained Raspberry Pi audio amplifier Hardware Attached on Top (HAT) board. It offers high definition audio at boom box power levels in a small form factor. Infineon’s multilevel technology ensures minimum size and consumption, state of the art power efficiency and HD audio quality for Raspberry Pi users and makers. Target field of use is active speakers with wireless music streaming.

The board (KIT_40W_AMP_HAT_ZW) is compatible with Raspberry Pi Zero W and Raspberry Pi 3 and 4. It leverages the MERUS multilevel class D amplification enabled by the MERUS MA12070P amplifier, which allows for filter-free amplifier design that does not need to use a filter-coil at the output filter. This significantly reduces the BOM cost and enables PCB area reduction.

The board furthermore provides high output power in small form factor up to 40 W instantaneous peak power at 4 Ohm. The solution offers best-in-class efficiency and playback time of up to 20 hours with a ~6700 mAh power bank. There is no need for additional power supplies; only a single 5 V/2.5 A USB power supply is sufficient for both the Raspberry Pi and the HAT.

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For a quick and easy audio system set-up, the board is compatible with the main Linux distributions such as Raspbian, Volumio, moOde Audio or JustboomPlayer. Dual-channel bridge-tied load (BTL) or single-channel parallel bridge-tied load (PBTL) configurations for Multiroom, TWS or subwoofer applications are also possible.

The Raspberry Pi audio HAT audio amplifier board is currently on stock.


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