AeroCool VP-550 : IC identification issue

[bendeg]

Re: AeroCool VP-550 : IC identification issue

Wrong way of testing things. Make a jig called a dim bulb tester. Works only with incandescent (old style) light bulbs. Get a 60w, a 100W and a 150w or 200w bulb. Otherwise you still risk that you blow parts up that you just put in.

Ok, thanks for the advice !

[CapLeaker]

Re: AeroCool VP-550 : IC identification issue

Wrong way of testing things. Make a jig called a dim bulb tester. Works only with incandescent (old style) light bulbs. Get a 60w, a 100W and a 150w or 200w bulb. Otherwise you still risk that you blow parts up that you just put in.

[bendeg]

Re: AeroCool VP-550 : IC identification issue

What do you think of such fuse holder in a PC power supply ?

1. Ok, no problem
2. No way !
3. At your own risks !

In fact, I don't really trust that kind of holder : inner springs might be loose over time...

[bendeg]

Re: AeroCool VP-550 : IC identification issue

Nope. That's not how the PSU works. There are 2 parts to it. One part is always on and that's the part this Sanken offline Switcher does. Then there is the PWM / PFC and that is your main power supply, plus the supervisor IC on the secondary.
Look up the Powerman IP that I repaired. My bet is that not only this offline Switcher is bad, the main filter cap (400V) is probably toast too. While you are at it, change each cap near a heatsink too.

Oh ok, I thouht these 2 ICs were related. I know now they aren't.

So, if the STR-A6059H I ordered fits well (fingers crossed...) and replacing the thermistor, the bridge rectifier, the MOSFET and the unique filter capacitor (180uF, 400V, reads only 5.5uF with the multimeter), I should see +5V on PS-ON and +5V on STAND BY, right ?
(I should probably better try with a bulb in series first...)

There's indeed another IC on the other side of the PCB which controls PFC : CM6805BG (10 pins, surface mounted). Well, I think that's the one who does this.

There's indeed also a supervisor IC : HY-510N in the secondary part.

You mean my PS is bad ? Possible, I'm not a pro...
Do you mean replacing ALL caps that sits next to a heatsink, even small ones !?!? (I suppose you talk about electrolytic caps only...)

But I remember seeing a beautiful spark while connecting the 4 pins CPU connector and I think my motherboard has suffered since then...And that any even new PS connected to it suffers...
I had to buy a third power supply, which also suffered, and I can't use my PC since a few years (I had to manually short the green and black wire to start it, and then push on the start button of my PC, really weird...). In short, a big mess...

I've seen your post about your Power Man : f... capacitor...
Well, I already know mine is out : reads 5.5uF instead of 180uF with my DMM

Thanks for your reply.

[CapLeaker]

Re: AeroCool VP-550 : IC identification issue

Nope. That’s not how the PSU works. There are 2 parts to it. One part is always on and that’s the part this Sanken offline Switcher does. Then there is the PWM / PFC and that is your main power supply, plus the supervisor IC on the secondary.
Look up the Powerman IP that I repaired. My bet is that not only this offline Switcher is bad, the main filter cap (400V) is probably toast too. While you are at it, change each cap near a heatsink too.

[bendeg]

Re: AeroCool VP-550 : IC identification issue

Hopefully you were careful opening the case. The rest of the lid of the IC should be floating around the inside of the power supply. I think you are right on it being a Sanken STR-A60xx series. Luckily there aren’t many to choose of. However these very few to choose of have different switching frequency. 67 vs 100khz.

Unfortunately, I didn't pay attention while opening the case, and the rest of the IC is lost...

As for the exact part number, I ordered a few STR-A6059H (the first of the series working at 100kHz), thinking maybe it was related to another IC on the other side of the PCB : a CM6805BG (10-PIN Green-Mode PFC/PWM Combo CONTROLLER), which also works at 100kHz.

There's certainly a way to determine, or at least narrow down the research, to find which one would fit knowing the other components connected to it but I don't know how and I couldn't find a place where to order a complete STR-A6000 series.

Probably Vdss MIN(V) and Rds(on) MAX (ohm) of the IC can give some important information to choose wisely...

Thanks for your reply.

[CapLeaker]

Re: AeroCool VP-550 : IC identification issue

Hopefully you were careful opening the case. The rest of the lid of the IC should be floating around the inside of the power supply. I think you are right on it being a Sanken STR-A60xx series. Luckily there aren’t many to choose of. However these very few to choose of have different switching frequency. 67 vs 100khz.

[bendeg]

Hi there,

A few years ago, my ATX Aerocool VP-550 blew its fuse. I replaced it : it blew again...

A IC blew as well, and is now showing it guts (see center of the picture).

After some research, I think it belongs to the STR-A6000 series (Off-Line PWM Controllers with Integrated Power MOSFET).
I can see its first 2 digits "A6...."

It has only 7 pins instead of 8 (no pin 6)
It's located very close to the filter capacitor (180uF, 400V) of the primary stage.

Does someone know what IC it is exactly ?

Other components out-of-order (maybe more...) :

• thermistor SCK-2R56 (2.5 ohms, 6A)
• Bridge rectifier GBU606 (short)
• Capacitor (180uF, 400V) shows 5.5uF on digital multimeter
• unknown IC (STR-A6000 series?)
• MOSFET MDP13N50 (sits just next to the bridge rectifier on the same heatsink, short)