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Home /  Support Center /  Knowledge Base /  LED dimmers /  Does your TRIAC Dimmable Power Supply use high-frequency PWM?

Does your TRIAC Dimmable Power Supply use high-frequency PWM?


I would like to ask if your TRIAC Dimmable Power Supply for LED Strip (3093.120) uses high-frequency PWM to dim the actual LED strip on the output side or uses PWM at the mains frequency.

I read your very good article which suggests that flicker-free PWM dimming needs to be at 25kHz or so. I live in New Zealand & we use 230VAC at 50Hz. I wish to adapt the existing 230V wiring to accommodate a dimmable LED strip. 

Our TRIAC dimmable power supply does indeed use high-frequency PWM on the output side to dim the LEDs. The PWM frequency is 25 kHz, which should be high enough for even the most sensitive or demanding of applications.

​On the AC input side, the power supply "interprets" a phase-dimming signal (commonly called TRIAC) which is produced by traditional wall dimmers in residential installations.

If you have a standard AC 230-volt mains voltage dimmer installed, our dimmable power supplier would be a great fit for the installation.

For additional guidance on installation, please see our layout map below:

https://www.waveformlighting.com/layoutmaps/3001_1A


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LED power suppliesLED dimmers


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