smps controller IC datasheet?

[DaveC]

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]

230D1

PUICO

http://oi44.tinypic.com/33a6o89.jpg

Logo seems pretty non-descript...

Anyone recognize it?

Thanks.

 

[DecadentLinuxUserNumeroUno]

http://oi44.tinypic.com/33a6o89.jpg

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.

 

[DaveC]

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.

 

[DecadentLinuxUserNumeroUno]

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):

Well, that should be easy to get a couple of.

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

This is a ASTEC ps from a large HP inkjet printer.

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.

 

[DaveC]

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.