The ma5332ms is packaged in 42 pin QFN with a size of 7mm x 7mm. In a small package, it integrates a dual channel PWM controller, a high-voltage gate driver and four low on resistance (RDS (on)) MOSFETs. Since the on resistance of the output stage of class D audio amplifier is very low (typical value: 24.4 m Ω), the ma5332ms can provide 2 x 100 W constant power for a 4 Ω load without heat sink; With a small 8 ° C / w heat sink, it can provide a constant power of 2 x 200 W for a 4 Ω load. Compared with other single-chip solutions, the size is greatly reduced. The ma5332ms provides differential or single ended input and multiple output configuration options - single ended (2x SE), bridged load (BTL), and parallel single ended (PSE), and supports dual or single power supply. Replacing BTL structure with Se structure can reduce bus capacitor and output low-pass filter.
Class D audio power amplifier has the advantages of small volume, less heating, high integration and high-definition sound quality. By releasing the great potential of Infineon's leading power MOSFET technology, Infineon Technology Co., Ltd. (FSE: IFX / otcqx: ifnny) launched merus ™ Dual channel, analog input class D audio amplifier multichip module (MCM) ma5332ms. The ma5332ms has been comprehensively upgraded on the basis of the previous generation products, and can provide the same or even higher output power as the single-chip audio amplifier without heat sink, reducing the board area by 50%. In the power range of 100w-400w per channel, ma5332ms is an ideal choice for consumer electronics products such as home theater system, strip speaker, subwoofer and mini sound system. It is also suitable for professional applications such as active speakers, active studio monitoring controllers, guitar speakers, car audio refitting and marine audio amplifiers
As a highly integrated multi chip module, ma5332ms also provides over-current, over temperature and under voltage protection circuits with self reset function. The protection circuit based on system on chip does not need to use external components to design the protection circuit, which can save time. In addition, the new internal logic control method to control the soft start operation further reduces the click noise. Thanks to the improvement of function, ma5332ms can reduce BOM (bill of materials) cost and heat dissipation requirements, bring more space for industrial design, and achieve excellent efficiency and low output distortion.
The multi chip module ma5332ms of merus class D audio amplifier packaged with pg-iqfn-42 is now open for ordering.
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