LNK306 Sound for circuit
Posted by: martijndeboer
on
Hello,
For my design comes a awfull sound at approx. 10 kHz. Can somebody give me some advice to solve this?
Best regards,
Martijn
Comments
In most cases, the noise is caused by the output inductor. Use a oscilloscope with a current probe and verify that the inductor is not saturating. Also verify that for a given load, that the switching frequency is stable. Use the recommended inductors.
Z. Cochrane
See also:
http://www.powerint.com/forum/ask-pi-engineer/rdk-131-load-vs-no-load-audible-noise
It may be the output capacitor.
Cheers
PI-Chekov