smps controller IC datasheet?

Discussion in 'Electrical Engineering' started by DaveC, Aug 14, 2013.

  1. DaveC

    DaveC Guest

    oem power supply, 31.5 vdc 1.5 A.

    I want to change the output to 24 v.

    There is one 8-pin IC, labeled:

    230D1
    PUICO

    I don't see a datasheet anywhere for this. 

    Any ideas?

    Thanks,
    Dave
     
    DaveC, Aug 14, 2013
    #1
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  2. DaveC

    DaveC Guest

    DaveC, Aug 15, 2013
    #2
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  3. Probably a custom chip specific to that assembly (or company,
    actually). The board it is on looks pretty cheap... single layer even
    (practically)

    When they make several M number of pieces, they get to make custom
    dies. Just a guess.
     
    DecadentLinuxUserNumeroUno, Aug 15, 2013
    #3
  4. DaveC

    DaveC Guest

    Probably a custom chip specific to that assembly (or company,
    It is an OnSemi PWM controller:

    <http://www.onsemi.com/PowerSolutions/product.do?id=NCP1230>

    The board is a 5-layer. Here's the other side of the board (the LV end):

    <http://oi42.tinypic.com/102w1go.jpg>

    This is a ASTEC ps from a large HP inkjet printer.
     
    DaveC, Aug 15, 2013
    #4
  5. Well, that should be easy to get a couple of.
    If you had a schematic, you could likely tell what type of chip you
    might be able to replace it with, should you not find the exact item.

    The one you pointed to is fixed freq, so there won't be a pair of pins
    for setting the frequency.
     
    DecadentLinuxUserNumeroUno, Aug 16, 2013
    #5
  6. DaveC

    DaveC Guest

    The one you pointed to is fixed freq, so there won't be a pair of pins
    It's a simple 2-resistor voltage divider on the output which determines the
    output voltage. I'll replace one of these with a pot -- for trials -- then a
    fixed R when the value is determined.

    Thanks.
     
    DaveC, Aug 17, 2013
    #6
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