Can I damage my PSU by PWM LED dimmer?

[yin]

Hello,

I have a cheapo 12V 100W power supply from eBay and another cheapo LED dimmer. It dims my 6W bench LED strip and uses PWM to do so. When powering anything, which switches rapidly, the powersupply makes these squiky sounds, like old transformers do.

Are there any power supplies out there, which can be damaged by a rapid switching action? How can I decide, if the sound is not an indication of potential problems?

[rickselectricalprojects]

Hello,

I have a cheapo 12V 100W power supply from eBay and another cheapo LED dimmer. It dims my 6W bench LED strip and uses PWM to do so. When powering anything, which switches rapidly, the powersupply makes these squiky sounds, like old transformers do.

Are there any power supplies out there, which can be damaged by a rapid switching action? How can I decide, if the sound is not an indication of potential problems?

no there should be no problem with power a pwm dimmer, those power supply's are designed to do that. the squeaky sound is probably (don't quote me on this) the power supply drawing current. i have the same power supply and it powers my UHF CB radio (my radio draws 1.5A) but it doesn't make that sound when i transmit. maybe a problem with the power supply.
i hope this helps

[yin]

Thanks rickselectricalprojects, I find it helpful. The problem is, the sound is not user friendly, which is a requirement with my project (I'm rebuilding my bench).

If there's a way to make the circuit more quite, I'd try it out. Maybe it is possible to filter out the resonance with some caps and such. I'll update the thread if I find a way to do it.