Paul Koning wrote: > > On Apr 29, 2016, at 3:32 PM, Bill Sudbrink <[email protected]> > wrote: > > > > ... The "bulbs" are labeled: > > > > 15F18120-45 15 watt 36vdc constant current > > > > I'd like to put four in a fixture and I'm trying to > > understand what kind of driver I need and how to wire > > it. I was thinking of using a Mean Well LPF-60D-36 > > like this: > > > > http://www.ebay.com/itm/Mean-Well-LPF-60D-36-AC-DC-POWER-SUPPLY- > Dimmable-LED > > -DRIVER-36V-60W-CLASS2- > /161857068172?hash=item25af6edc8c:g:9hQAAOSwA4dWHVn5 > > > > and wiring the "bulbs" in parallel to it. But after > > realizing that I'm not completely sure what a "constant > > current" power supply does and doing a little "googling" > > I don't know if that's the right approach. > > A constant current supply is one that delivers a constant > current to a varying load (within limits) just as a constant > voltage supply delivers a constant voltage to a varying load.
Ok, I figured that much. The problem/question is why there are no Amp ratings on anything? Assuming the DC equation: Watts = Amps X Volts I want a constant current supply that "pushes" 0.41 Amps. A little more googling reveals that the above supply is rated "1.67A output". This seems to support the W=AV theory. So, do I want a PS labeled "15 watt 36vdc", regardless of how many bulbs I want to drive? You say "within limits". What specification do I look for to understand the limits? Thanks
