Hello,
I need to dim a constant current LED driver (driving a power LED) using an N-channel MOSFET. The driver is PWM-dimmable on the AC side.
(I have already successfully used a similar setup with a constant voltage driver and LED strip but in that case, the MOSFET went to the DC side. I followed this guide: Driving a LED strip with Arduino - Yet Another Arduino Blog )
Where should I put the MOSFET in relation to the constant current driver? My hunch is to put it on the neutral wire but what about common ground with the Arduino?
Excuse me for my ignorance, I'm new to this and couldn't find a definitive answer or tutorial before posting here. Thanks!
Hi,
You will have problems with constant current driver as it uses PWM to limit the output current.
You would be best to get a dimmable current driver module.
google dimmable LED driver
Tom... 
TomGeorge:
You would be best to get a dimmable current driver module.
Thanks for your reply!
It is a dimmable driver (TG-6530) but it doesn't have a PWM input. Does it mean that it's not PWM-dimmable at all?
That page says it is a
Product Name:18X1W,Triac Dimmable Driver
The word Triac is the name of a switching device. It is only suitable for switching AC so that means it is no good for a PWM signal.
Grumpy_Mike:
That page says it is a The word Triac is the name of a switching device. It is only suitable for switching AC so that means it is no good for a PWM signal.
Thank you, that's it. I didn't know what a triac was, my bad. I've only worked with constant voltage drivers before.