Power supply build quality pictorial. part 2

[Pentium4]

Re: Power supply build quality pictorial. part 2

Cool, thanks! I think it could do 500W..........at 15C ambient

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

Chieftec GPS-500AB A

[c_hegge]

Re: Power supply build quality pictorial. part 2

^
Do I see a capxon on the 5vsb there?

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

^
Do I see a capxon on the 5vsb there?

The caps are a mix of Samxon, Chemicon KY and Ltec.

[Behemot]

Re: Power supply build quality pictorial. part 2

I did similar, 400W model couple days before. Besides the Samxon on primary it was full of crap, Capxon on +5 V SB was bulged. It was basically Delta PSU, they used the same model number and just placed Chieftec there

[Pentium4]

Re: Power supply build quality pictorial. part 2

That's a nice power supply. How many 12V rails does it actually have?

[Behemot]

Re: Power supply build quality pictorial. part 2

Mine actually had two and due to all those potentiometers and overall big daughterboard on secondary here (possibly full of monitoring ICs) I'd say it has all three.

[Th3_uN1Qu3]

Re: Power supply build quality pictorial. part 2

Chieftec buys direct from Delta and just slaps their label on. A few years back they were the ONLY brand that would get you a decent power supply at a reasonable price, around here.

[Pentium4]

Re: Power supply build quality pictorial. part 2

It's better than those older Chieftec's that used Jenpo caps, those are some of the least reliable caps I've seen

[Behemot]

Re: Power supply build quality pictorial. part 2

Chieftec buys direct from Delta and just slaps their label on. A few years back they were the ONLY brand that would get you a decent power supply at a reasonable price, around here.

Yeah but those times are long gone. Where si Chieftec now? You barely hear about them, recently they started selling new mediocre line with like 6 different powers, but it offers nothing over similar chineese PSUs which are now everywhere around. Not mentioning branded low-end and mainstream PSUs…

[Pentium4]

Re: Power supply build quality pictorial. part 2

So I recapped that Dynapower PSU, removed the dummy resistors on the main rails and replaced the 30A ultra fast on the 12V with a 40A schottky rectifier. A few of the little Fuhjyyu caps were over 20 ESR!

[370forlife]

Re: Power supply build quality pictorial. part 2

That dynapower is a CWT unit, btw.

[Pentium4]

Re: Power supply build quality pictorial. part 2

My original hunch was right, thanks for confirming it

[kaboom]

Re: Power supply build quality pictorial. part 2

A few of the little Fuhjyyu caps were over 20 ESR!

Hehe, they almost weren't even in the circuit!

[momaka]

Re: Power supply build quality pictorial. part 2

That dynapower is a CWT unit, btw.

Yup, a CWT unit from their ISO line. You can tell by the "ISO" markings on the PCB close to the fuse.

It's an overall good design minus the 2-transistors 5VSB circuit.

I've seen a lot of these now mislabeled on purpose with UL numbers pointing to other random PSU companies. The two I have - a Cyberlink and a Turbolink, point to Deer/L&C and Macron Power, respectively (IIRC).

[lti]

Re: Power supply build quality pictorial. part 2

Samsung TAD037JBE cell phone charger

Output: 5VDC 0.7A

The caps are all Sam Young. The primary caps are SHD series 4.7uF 400V, and the output filter caps are KMF series 470uF (pi filter input) and LXV series 220uF 10V (pi filter output).

The switching IC is an SC1009PN, which I can't find any information about.

The output cable plugs into a connector on the board, and the fingers on the edge of the board contact the prongs of the plug.

[Behemot]

Re: Power supply build quality pictorial. part 2

Using PWM, that's quite nice…for occasional use, why not. But running daily, the caps will die.

[Th3_uN1Qu3]

Re: Power supply build quality pictorial. part 2

Cellphone chargers have been SMPS type for quite a while now.

[Behemot]

Re: Power supply build quality pictorial. part 2

Yeah but many are some awful single/two transistor forward designs.

[Khron]

Re: Power supply build quality pictorial. part 2

The logo on that chip looks to me very much like http://www.powerint.com/

Must be some older discontinued chip. I've seen the TNY276/277 used in several ATX 5Vsb's though (particularly some Dell / Celetronix 305W units)