LARGE 12 & 14 volt 3 stage charger with a twist....

Discussion in 'General Electronics Chat' started by Dan., Apr 17, 2008.

  1. Dan.

    Thread Starter New Member

    Sep 16, 2007
    3
    0
    Hi All,

    First of all many thanks for your help with the DC-DC regulator previously, it works a treat :D

    Now I have a much larger (and more complex) project.

    I need a 3 stage charger / power supply...

    Charger Specs
    Stage 1 Constant Current @ 50A up to Stage 2 voltage (i did say large...)

    Stage 2 Votages (selectable)
    Voltage 1 - 14.4V or Voltage 2 - 16.8V

    Stage 3 - When current is less than 10A voltages lowers to
    Voltage 1 - 13.62V or Voltage 2 - 15.89V

    I also need the unit to work as a powersupply at the stage 2 voltages (again selectable). Not sure if this could be built into the circuite with a switch to defeat the 3rd stage? or of it would be easier to have a seperate set of connections on the front of the box? Basically I would like as much current as possible when on this setting.

    I have scoured the net looking for circuit diagrams but am unable to find anything suitably large. You may have noticed I'm far from being an electronics guru, but with a suitable diagram and component list I feel confident I can build it.

    Hope you can help!:)
     
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