Other Parts Discussed in Thread: TPS92513, TPS92410, , UCC28700, LM3447
I currently have a SMPS generating 24V, 2A output, which is running two individual TPS92513 It is working quite well, but the problem is that it takes up quite a lot of space for the transformer, and input capacitor.
I am also powering a MCU from the output of the SMPS.
If I were to redesign the SMPS to output only what is needed by the MCU (3.3V, 0.5A) I could make it much smaller, and fit in a TPS92410 and two TPS92411.
Since I need to control two separate LED strings, and dim them individually, would I need two TPS92410 as well?? or is it possible to dim from the TPS92411?
Or maybe someone can suggest a better design...
My requirements are to drive a MCU that needs 3.3V, 0.5A, that is capable of dimming two sets for LEDs independently. Currently I am using 5 Cree LEDs in each string, that require 15.26V, 0.64A.
Any help or suggestions would be greatly appreciated.
Thanks,
Derek