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smps controller IC datasheet?

Started by DaveC August 14, 2013
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

On Wednesday, August 14, 2013 10:05:11 AM UTC+2, DaveC wrote:
> oem power supply, 31.5 vdc 1.5 A.=20 >=20 >=20 >=20 > I want to change the output to 24 v.=20 >=20 >=20 >=20 > There is one 8-pin IC, labeled: >=20 >=20 >=20 > 230D1 >=20 > PUICO >=20 >=20 >=20 > I don't see a datasheet anywhere for this.=A0 >=20 >=20 >=20 > Any ideas? >=20
The NCP1230: http://www.onsemi.com/pub_link/Collateral/NCP1230-D.PDF Cheers Klaus
> 230D1 > PUICO
http://oi44.tinypic.com/33a6o89.jpg Logo seems pretty non-descript... Anyone recognize it? Thanks.
On Thursday, August 15, 2013 1:13:45 AM UTC+2, DaveC wrote:
> > 230D1 > > > PUICO > > > > http://oi44.tinypic.com/33a6o89.jpg > > > > Logo seems pretty non-descript... > > > > Anyone recognize it? > > > > Thanks.
Yes, I did. Se the earlier post....
> 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.
> 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.