I have 5 pieces of 100W LED chips but customs won't let me import 5 pieces of drivers to power them unless I pay a ridiculous sum. They are 100 Watt LED chips rated 30-35V @ 3A.
I cannot find 36V LED drivers locally, So I need to choose a 400 to 600W LED driver and use several DC-CC converters.
There are 12 to 48 Volt drivers available; which voltage would be a better choice? Should I go for a lower voltage driver (12V or 24V) and step-up converters or higher voltage driver (36V or 48V) and step down converters to obtain a more reliable and efficient system?
My gut tells me to go with a 36V-600W driver and add 5 pieces of DC buck converters but I am not sure if it would be a long term & reliable solution. Can I succesfully power these LEDs using this DC converter?
Best Answer
If you have a 600W, 36V LED driver circuit available to power 5 100w, 30-35V LEDs, why would you then need to use voltage converters?
LEDs actually don't care if you apply a source to them that is capable of an open-circuit voltage over their rated voltage; they only care how much current you allow through them.
This means that all you really need is a FET for each LED & a resistor/zener diode to set the current passed by the FETs in order to drive your LEDs from that 600W, 36V driver (or from any other 35-38V source that's capable of pushing the needed 15A). Something like this should work great:
PARTS:
* Zener Diode - NZX3V3B,133
* N-MOSFET - IRLIZ14GPBF
* Resistor - 2K2, >=0.25W
* Heat Sink - 530002B02500G
* Total Bill Of Sale < $25USD