Post Your Answer
5 months ago in Power Electronics By Kirti
How does switching frequency affect noise in power converters?
I'm choosing a switching frequency for a new converter. How does this choice affect the noise I'll have to deal with?
All Answers (1 Answers In All)
By Suresh Answered 1 month ago
In multiple ways. Higher f_sw pushes conducted EMI fundamentals higher, sometimes easing filter design—but increases radiated emissions due to sharper edges (dV/dt, di/dt). For audible noise (coil whine), switching above 20 kHz moves harmonics out of human hearing range, a common trick. But higher frequencies also mean higher-frequency magnetic vibrations. There's no free lunch: you trade one noise type for another. Know your application's noise limits before choosing.
ÂReply to Suresh
Related Questions