I built a CC source for some LED's. Set it to run at 250mA (not your typical 5mm LED). When I powered it from a 12VDC source I had to adjust the current to get what I wanted. Almost couldn't get to the 250mA. Tried powering it from 24VDC and got a whole lot more current. I thought the CC was supposed to hold current through all the changes. I'm thinking I must be wrong.
What I am more confident in is that if the load changes the CC will remain the same. But I thought as long as the source was sufficient, going from merely sufficient to plenty of headroom in source voltage the CC would remain the same. Is that a wrong assumption?
What I am more confident in is that if the load changes the CC will remain the same. But I thought as long as the source was sufficient, going from merely sufficient to plenty of headroom in source voltage the CC would remain the same. Is that a wrong assumption?