Infineon Applied sciences introduced a brand new household of 2x 37W audio amplifiers that includes the second technology of MERUS multilevel switching amplifier know-how. Optimized for low energy and battery-powered purposes, the brand new gadgets are the MA2304DNS with an built-in and fully-configurable digital sign processor (DSP), and the MA2304PNS with audio limiter and quantity management options. Each at the moment are essentially the most environment friendly within the Infineon MERUS household, with an idle energy mode at the least 5 occasions decrease than conventional class D audio amplifiers.
When designing moveable and battery-powered audio gadgets for client speaker purposes, maximizing battery playback time and, on the similar time, sustaining glorious audio efficiency in a compact type and at a low system value is important. MERUS multilevel switching know-how from Infineon is designed to attain low switching losses and extremely environment friendly amplification at each high and low output energy, bringing the specified advantages in such purposes. The brand new ICs function the second technology of this know-how and are available in a compact 40-pin QFN package deal. They primarily handle purposes comparable to battery-powered audio system, Bluetooth/wi-fi/sensible audio system and soundbars, convention audio system, and multi-channel/multi-room audio programs.
The brand new household consists of MA2304DNS with an built-in and fully-configurable digital sign processor (DSP) and MA2304PNS with audio limiter and quantity management options. Each gadgets function the second-generation multilevel-switching class D audio amplifiers with an inductor-less operation and supply a bridge-tied load (BTL)- rated output of 2x 37W and an influence provide voltage vary (PVDD) of 10V to 20V for top constancy audio efficiency. The five-level voltage modulation presents an ultralow idle energy of 52mW with out the necessity for complicated dynamic rail‑monitoring programs. That is at the least 5 occasions decrease than the normal class D audio amplifiers, making these gadgets preferrred for battery-powered speaker purposes with prolonged battery life and/or lowered battery cell value.
At low output energy, the effectivity could be greater than 80 % providing prolonged battery life and straightforward thermal administration in multi-channel designs. Multilevel switching additionally relaxes electromagnetic compatibility (EMC) necessities and allows inductor-less purposes at full energy vary with decrease value. In comparison with conventional two- and three-level class D audio amplifiers, the lowered electromagnetic interference (EMI) emissions enable for quick time-to-market with out compromises in audio efficiency or effectivity. In mains‑powered multi-channel purposes, the lowered and scalable EMI allows in any other case not possible industrial designs without having a heatsink or a conventional LC filter.
A high-order inside suggestions loop ensures low whole harmonic distortion (THD) and low noise flooring for glorious audio efficiency. The inductor‑much less software contributes to the smallest output filtering, avoiding cumbersome inductors, thus decreasing system value with out output energy limitations. The built-in DSP within the MA2304DNS is extremely configurable and might appropriate imperfections and tune actual speaker purposes with equalization, limiting, and different comparable features. The MA2304PNS presents a less complicated quantity management and limiter for programs the place an software/connectivity processor does the audio processing.
The MERUS MA2304DNS and MA2304PNS 2x 37W second technology multilevel class D audio amplifiers with an inductor-less operation at the moment are obtainable in a QFN 6 x 6 mm² package deal. Devoted amplifier IC analysis boards are additionally obtainable.