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12v Battery Charger Circuit with Auto Cut off

Discussion in 'Power Electronics' started by green90, Oct 11, 2015.

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  1. green90

    green90

    6
    1
    Sep 1, 2015
    1-what will be the voltage on( cv or pin 5)coz it internally connect to voltage divider


    http://www.circuitsgallery.com/2013/04/automatic-battery-charger-controller.html
    Working

    • Positive terminal of the upper comparator of 555 is connected with reference voltage in order to turn OFF the charger if the battery charges above 13.8V.
    • why they said Positive terminal ?????? i think ( cv or pin 5) is negative terminal
    [​IMG]
     
  2. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Pin 5 is the inverting terminal of the 555s internal comparator. I think what they mean is that it's related (connected) to the TH pin which is the non inverting terminal of the comparator which just happens to be more positive than the CV pin.
    Adam
     
  3. Colin Mitchell

    Colin Mitchell

    1,418
    314
    Aug 31, 2014
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