Help on homemade power supply

Discussion in 'The Projects Forum' started by wall_, Sep 11, 2013.

  1. wall_

    Thread Starter New Member

    Sep 11, 2013
    4
    0
    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?
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,120
    3,046
    Why not just buy one ready made? You won't beat the price by doing it yourself.
     
  3. wall_

    Thread Starter New Member

    Sep 11, 2013
    4
    0
    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.
     
  4. wall_

    Thread Starter New Member

    Sep 11, 2013
    4
    0
    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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