Help on homemade power supply

Thread Starter

wall_

Joined Sep 11, 2013
44
Hi, I'm trying to design an adjustable sepic cc/cv power supply based on LM2588T for laser diode and led testing and multiple cell lithium charging from 5v input, but I have no idea how to make it constant current and constant voltage like the lm2596 modules with 3-pots sold on ebay. Those module have 3 leds, led2 indicates load is attached, led1 indicates constant current and led3 indicates battery charged.
How can I make something similar with an LM2588?
 

Thread Starter

wall_

Joined Sep 11, 2013
44
Because I can't find any LM2577/87/88 with constant current, only a boost then buck lm2596/lm2577 module, but that isn't so efficient neither it's cheap. This isn't about cost, it's about learning and I want to use the ic samples I have and other salvaged components and end up with something I could actually use.
 

Thread Starter

wall_

Joined Sep 11, 2013
44
I also have a few LT1512 samples, sepic cc/cv battery with adj float voltage but can't handle as much current.
 
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