There are a couple of different ways to do brightness control and also to have less than a volt at the FB pin to reduce the power dissipation in the sense resistor. Please refer to the reference design ( www.ti.com/.../PMP10596 ) that showcases all those…
Other Parts Discussed in Thread: LM46002 , TPS92510 , TPS92512 , TPS92513 This is the continuation of a discussion that started in the Simple Switcher forum. I asked about using the LM46002 as a constant-current LED driver, and was directed to this document…
Hi Fleming,
If you can accept BUCK converter, LMR14030 or LM61440/60 are all not bad. But thermal will definitely be a big challenge at 20V/3A
If you need buck controller, you can consider LM25145. I also found a related design for you. Please see…
