Using class D amplifiers in portable apps

Class D amplifiers are generally efficient, making them ideal candidates for portable applications that require long battery life and low thermal dissipation. However, electromagnetic interference (EMI) is an issue that commonly accompanies the Class D switching topology. Active emissions limiting reduces radiated emissions and enables "filterless" operation, allowing designers to create small, efficient portable applications with low EMI.

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Originally published by Maxim Integrated at www.maximintegrated.com as "Reduce EMI and Maintain High Efficiency with Class D Amplifiers in Portable Applications".