Infineon has created a 7 x 7mm multi-chip module that can deliver two audio channels of up to 100W each. Called MA5332MS, the company claims 95% for the Class-D amplifier when driving that power into 4Ω loads (10% THD+N, ±36.5V supply). Looking at the data sheet, up to 90W is available with <0.1% THD+N. Providing the load ...

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