资料介绍
Electronic and magnetic components can generate audiblesignals when they are excited at frequencies in the range ofhuman hearing. This phenomenon has been observed since theearly days of electric power conversion. Transformers operatingat the line frequencies of 50 and 60 Hz often produce anundesirable hum. It is well known that switching powerconverters operating at constant ultrasonic frequencies canproduce audible noise if their loads are modulated with audiofrequency components.
Audio Noise Suppression
Techniques
Application Note AN-24
Electronic and magnetic components can generate audible TM
signals when they are excited at frequencies in the range of Quick Guide for TinySwitch Designs
human hearing. This phenomenon has been observed since the The ON/OFF control used in TinySwitch can generate audio
early days of electric power conversion. Transformers operating noise in the clamp capacitor and the transformer at certain
at the line frequencies of 50 and 60 Hz often produce an load conditions. The following simple design
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