MCP73831/2 Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers

Discussion in 'General Electronics Chat' started by RodneyB, Jun 10, 2015.

  1. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
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    I would like to try and charge a battery using this IC. Using the "Typical Application circuit" shown on page 17. The battery I Have is a 1900mAh so want to charge at a current of 190mA.

    Reading the datasheet I can see how Rprog is calculated or the value for Cout
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Do you have a question for us?
     
  3. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
    633
    13
    Wow so sorry um what I was meant to ask was HOW do you calculate Rprog and Cout I could NOT see how to do this in the datasheet.
     
  4. Roderick Young

    Member

    Feb 22, 2015
    408
    168
    On page 7, figure 2-4 seems to show the current in constant current mode vs. Rprog. On page 15, section 5.12, it says 1000/Rprog.

    Cout seems to be to filter supply ripple, and possibly improve transient response. See graph 2-11 on page 7. I'd leave it at 4.7 uF.
     
    Last edited: Jun 11, 2015
    RodneyB likes this.
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