All Questions
4
questions
1
vote
1
answer
494
views
Sanity checking an LM2596-ADJ constant current supply design for driving LEDs
I've designed, in simulation, an adjustable constant-current supply based on an LM2596-ADJ buck converter IC.
I chose STW8B12C LEDs for simulation because three of them in series roughly matches up ...
- 10.8k
-2
votes
1
answer
211
views
Limiting output range of Buck Converter
I bought one of these cheapo Ebay toys from China. It's a buck converter with a Constant Current function. I plan on using to drive LEDs from an 18.5v 18650 li-ion battery pack.
One of the ...
- 43
0
votes
1
answer
413
views
Calibrating buck LED driver by altering Vsens
Many switch mode buck LED drivers use a current mode scheme with a sense resistor back to a Vsens or Current Sense input on the chip. A good example is the LM3404. Here's the typical use circuit:
I ...
- 2,588
2
votes
3
answers
278
views
Can I get constant current at the output of a buck convertor (to drive a LED)?
I want to drive a LED with a buck converter circuit as shown in the schematic below. In order to keep the circuit simple, the system will run open-loop (i.e.; there won't be any voltage or current ...
- 14.2k