Battery Charge regulator from Alternator

Discussion in 'The Projects Forum' started by alexuma, Aug 1, 2008.

  1. alexuma

    Thread Starter Member

    Jun 24, 2008
    11
    0
    I came across two great component which can be used to rectify(Alternator's ac input) and to regulate using IC "LTC 4412" from Linear technology & MOSFETs from "International rectifier".

    But I concerned about Voltage supply to IC, Vin ??

    Can anyone please suggest me how to take it forward. I am looking for suggestions on making IC LTC 4412 safe in this application so that it may gate the MOSFET well in order to regulate battery voltage.

    Any suggestion is welcome.

    Alex.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    The maximum input voltage is 28 Volt.
    The stat and ctl voltages is maximum 36 Volt.
    You have to reduce the voltage to 28 Volt max.
    See datasheet.

    Greetings,
    Bertus
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    So Alex,
    Why don't you power the IC from the battery?
     
  4. alexuma

    Thread Starter Member

    Jun 24, 2008
    11
    0
    Can we power this IC from battery ?

    Since alternator is directly charging B+ where the voltage while charging will definitely be stator's voltage (approx 50 V)

    I really wanted to use that IC for controlling MOSFET and regulating charge on the battery.
     
  5. alexuma

    Thread Starter Member

    Jun 24, 2008
    11
    0
    Are you talking about putting a separate battery/power supply for that IC ?

    I guess that option will limit the application of this rectifier -regulator ! This may go in some engines where just one 12 V battery is power source.
     
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