Apr
24
Filed in LEDs, Power, Project, Prototyping
I’m already up past my bedtime, so just a few pictures for now. Write-up coming soon!
Specs: Input 2v to 6v DC … Output constant current 50mA up to 28v DC
Efficiency: Initial measurements, somewhere around 75%
Chip Texas Instruments TPS61040
size comparison, american quarter dollar piece
circuit detail – design is one-sided PCB with two through-hole jumper wires and the diode, everything else is smt
twin 1uF tantalum capacitors … the output capacitor I had originally selected was limited to 16v, so this was the best I could come up with on a Sunday. Note the top of the coil is missing – these things are fragile!
Popularity: 28% [?]
Scott said:
Nice sight, circuit! I need a constant current circuit that outputs 3 Amps continuously.
justDIY said:
Scott, without knowing more details, I’d recommend you check out the HV9910 from Supertex. It has gotta be the most flexible smps controller I’ve seen.
Zdeamon said:
how many of these do you have and can you make me one?
Randel said:
Are you selling thease?