churchhaze
Well-Known Member
Did you figure out how many volts the current limiting resistor or the current mirror drops? Those will both reduce efficiency by a lot. Assuming 1ohm resistors and 1.4A per string, that's 1.96W lost per resistor. Vce on a BJT or Vds on a mosfet is not going to be negligible either. Then there's generating the reference current...@Airwalker16 funny timing. Im actually working on a video discussing that topic.
Parallel wiring cobs using:
-fuses
-current limiting resistors
-how to build a current mirror
The premise is: "someone" is on a restricted budget. They need light now, but dont want to piss their limited funds away on some china shit. So they buy a heatsink that can handle some serious juice, one COB, and one driver.
As their budget increases, or they save up, they add a second cob & heatsink for the same dissipation, but driving up efficiency, then a 3rd and so on.
Im basing it off of the ICEled cooler and this driver (for demonstration purposes): I guess ill have to see if the iceled ULTRA can handle a 3590@ 2.3 amps, lol.
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