smps controller IC datasheet?

Discussion in 'Electronic Equipment' 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. DaveC

    DaveC Guest

    > 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.


    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
    #3
  4. DaveC

    DaveC Guest

    > The one you pointed to is fixed freq, so there won't be a pair of pins
    > for setting the frequency.


    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
    #4
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