Codegen 450X - Actually -looks- OK

[c_hegge]

Other than the thin heatsinks and smallish silicone, I can't really find anything wrong with this unit. It has a 35-size transformer, a proper bridge ractifier and a full input filter, It actually looks half decent, but it just can't be. It's a codegen!

[goodpsusearch]

Re: Codegen 450X - Actually -looks- OK

Where is the second input coil?

How many uF are the input caps?

[c_hegge]

Re: Codegen 450X - Actually -looks- OK

There only is one. When I said full I meant no jumper wires. The primary caps are a bit on the small side at 470uF, but I've seen worse (330uF).

[everell]

Re: Codegen 450X - Actually -looks- OK

It has a fuse in the primary, that's a good sign. It has pi filters in the outputs, coils as well as capacitors...that's a plus. The fan looks cheap and !@#$%^&, but it can be replaced. Looks like a keeper.

[goodpsusearch]

Re: Codegen 450X - Actually -looks- OK

With 470uF input caps and no apfc you will be lucky if it can do 300W (max).
I would replace them with 680uF or 820uF.

What are the switching transistors?

And the secondary rectifiers?

[kc8adu]

Re: Codegen 450X - Actually -looks- OK

thats the first codegen i have seen that would not instantly set off my instinctive reaction to shoot a basket at the trashcan,get hand/arm excercise by crushing it into a ball,or placing it into the box labeled "rifle targets".
mislabeled?

[c_hegge]

Re: Codegen 450X - Actually -looks- OK

...mislabeled?

I don't think so. The heatsinks and PCB layout look typical of codegen. This one just sems to have better components. I remember 370 saying somewhere in another thread that codegen can be a bit like solytech. Their cheap units are pure junk, but pay a bit more and they are OK.

[c_hegge]

Re: Codegen 450X - Actually -looks- OK

With 470uF input caps and no apfc you will be lucky if it can do 300W (max).
I would replace them with 680uF or 820uF.

What are the switching transistors?

And the secondary rectifiers?

I think the primaries are 13007s. The secondary has a 30A for the 5v, 20 for the 3.3v and the 12v is hidden by a coil (16A would be my guess).

I know that this is not an excelent PSU, but unlike most of the codegens I've seen in the past, it looks like it might be possible to improve it.

[goodpsusearch]

Re: Codegen 450X - Actually -looks- OK

The secondary is typical of a 5V psu. Not bad.

The switching transistors are good for ~250W.

Considering that the 13009s of the other psu you had exploded at 277W, I wonder if those would blow even lower.

At least those are in a big package.

[c_hegge]

Re: Codegen 450X - Actually -looks- OK

They might actually be 13009s. The last number is hard to read as the transformers and the top of the heatsinks are in the way. I could make out 1300 somethink. I just assummed 13007 due to the size as 13009s are usually in the bigger size.

[370forlife]

Re: Codegen 450X - Actually -looks- OK

The cheap, off brand semiconductor companies often lie about the ratings of their parts, such as some Jilin Sino parts or those knock off fairchild parts that use the fairchild "f" without the strike-through on the f, making it a J. They may label a 13007 as a 13009, and then rate it at a obscenely low temp. A 13009 in to-220 form cannot do as much as 13009 in to-3p due to heat distribution properties, among other things.

Also just bad designs can result in failures. There's a reason why one unit that uses 2sc3320's for primary switchers can do 700W (superflower), while another can't do more than 350W (solytech).

[c_hegge]

Re: Codegen 450X - Actually -looks- OK

I was surprised by the load test results. It made it all the way up to 315 Watts. If I increased the load, it shut down. It powered right back up after I reduced the load back to 315W. It actually has overload protection! WOW!

[momaka]

Re: Codegen 450X - Actually -looks- OK

I was surprised by the load test results. It made it all the way up to 315 Watts. If I increased the load, it shut down. It powered right back up after I reduced the load back to 315W. It actually has overload protection! WOW!

If it's a cheap PSU and it doesn't explode when overloaded, then I say that's a keeper as well.
I'm guessing the PWM controller is SG6105 (looks like it too).
Does it have shunts on any of the rails?

[goodpsusearch]

Re: Codegen 450X - Actually -looks- OK

Impressive. So 13007 switchers and 470uF big caps are able to do 300W+ in a good design?

Did it get hot enough?

[370forlife]

Re: Codegen 450X - Actually -looks- OK

SG6105 features OPP.

[c_hegge]

Re: Codegen 450X - Actually -looks- OK

Impressive. So 13007 switchers and 470uF big caps are able to do 300W+ in a good design?

Did it get hot enough?

I got a better look at it with some good light. they are actually 13009s. It did get a bit hot (probably due to a fan controller that takes too long to increase the fan speed), but I don't see any melted plastic insulators like I did in the Sky "550W" that blew up at half that. I'll re-cap it and maybe add a better fan controller as it looks like a keeper.