Switching amplifiers help reduce EMI

20th March 2023
Mick Elliott

In stock at distributor Mouser Electronics are the MA2304xN MERUS multilevel switching amplifiers from Infineon Technologies.

These amplifiers provide power efficiency at both low and high output power for wireless and Bluetooth speakers, soundbars, and battery-powered designs for conference and multichannel room audio systems.

The MA2304DNS is a 2 × 37 W audio amplifier with fully integrated and configurable DSP (digital signal processing) with I2S/TDM (time division multiplexing) audio interface.

It features MERUS multilevel switching amplifier technology, enabling unmatched power efficiency at both low and high output power, without the necessity for a heatsink or a traditional LC filter.

Multilevel switching also reduces EMI (electromagnetic interference) and enables inductor‑less applications with lower cost and no compromise in audio performance or efficiency.

A high-order internal feedback loop ensures low THD (total harmonic distortion) for excellent audio performance.

The MA2304PNS offers a simpler volume control and limiter for systems where an application/connectivity processor does the audio processing. This makes the MA2304PNS ideal for battery-powered speaker applications where extended battery life and/or reduced battery cell cost are crucial.

Featuring an audio limiter and volume control with ultra‑low idle power consumption, five times lower than the traditional class D audio amplifiers, the MA2304PNS is also optimal for In-mains powered multichannel applications where reduced and scalable EMI performance facilitates designs, without the need for a heatsink.

The Infineon MA2304DNS and MA2304PNS are supported by the EVAL_AUDIO_MA2304DNS and EVAL_AUDIO_MA2304PNS evaluation boards. The evaluation boards enable the user to demonstrate the features of the MERUS amplifiers, including energy efficiency, audio performance, and their adaptive power management system.

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