Help identify the pin out or datasheet for this IC - Page 1
Forum section: electronics / repair

author: abdolah
author_rank: Regular Contributor
timestamp: February 10, 2024, 03:45:25 pm
content: wt7579 is an ic in power supply for pwmThis version is 20 pin . I only found the data for the 8 pin and 14 pin and 18 pin versionsThe pin out for the 20 pin version is different . I know that because I managed to trace some pins of the ic on the board and identified them . And it's not like the datasheetI also don't have an oscilloscope to test .If Thier is some trek to know if the ic working or not without an oscilloscope would be helpfulThe issue is the power turn on without shorting the pson pin to ground

author: abdolah
author_rank: Regular Contributor
timestamp: February 10, 2024, 03:46:26 pm
content: The other side of the board

author: abdolah
author_rank: Regular Contributor
timestamp: February 10, 2024, 05:17:04 pm
content: Yeah that not the right pinout because I traced some pins on the board going to the main board

author: abdolah
author_rank: Regular Contributor
timestamp: February 10, 2024, 05:35:24 pm
content: Actually I think I might be the one that I'm looking forThanks so much for the help

author: Hamelec
author_rank: Regular Contributor
timestamp: February 11, 2024, 04:40:26 pm
content: ..it looks like that you have pulled out almost all via hole metallisations of your main board during disassembly

author: abdolah
author_rank: Regular Contributor
timestamp: February 12, 2024, 12:19:11 am
content: Yes because the soldierI will fill every holl with good amount of soldier . I think it will work

author: abdolah
author_rank: Regular Contributor
timestamp: February 13, 2024, 02:53:25 am
content: I'm sorry do you know any equivalent Ic . Because I can't find it only to buy it

author: karolyi
author_rank: Newbie
timestamp: February 13, 2024, 05:15:43 pm
content: Hey,newly registered here.I have a "be quiet! Straight Power 11 850W 80+ Gold" PSU that has the WT7579 supervisor chip in it, and the PSU doesn't turn on. Since we don't have the schematics/pinout for the chip, we can't tell if that chip is faulty, but things seem to work until it.Weltrend (the manufacturer) doesn't have any information about it, one can only find references tot he chip on websites that are reporting about the PSUs utilizing it.Does anyone have a pinout/schematics for the 18-pin variant?Cheers

author: coromonadalix
author_rank: Super Contributor
timestamp: February 13, 2024, 05:28:31 pm
content: you could be in presence of a custom made ic ... ?

author: karolyi
author_rank: Newbie
timestamp: February 13, 2024, 06:20:58 pm
content: Hey,thanks for the quick response.We're mistaken, the chip has 20 pins. Since the information for it is already posted here, we'll see if it helpsAs a side note, I did some extensive search on the chip and the only place that has any pinout of it is this forum.I reached out to the manufacturer in Taiwan for help but doubt they will be helpful.

author: abdolah
author_rank: Regular Contributor
timestamp: February 21, 2024, 10:39:55 pm
content: Did they respond to you

author: abdolah
author_rank: Regular Contributor
timestamp: February 22, 2024, 06:15:14 am
content: Hi I found the equivalent ic'sWt7527 dip-16 2 channel for the 12VPs223 dip-16 also 2 channelSg6521 dip-16 also 2 channelAll of them support OTP for the NTC on the heat thinkI find it on this website in picture below 👇Hope that helps

author: fzabkar
author_rank: Super Contributor
timestamp: February 22, 2024, 07:08:19 am
content: https://www.techpowerup.com/articles/overclocking/psu/160/9These 20-pin ICs appear to be a match:http://www.siti.com.tw/product/spec/Power/SP-PS232F-A.001.pdfhttp://www.siti.com.tw/product/spec/Power/SP-PS232S-A.003.pdf

author: coromonadalix
author_rank: Super Contributor
timestamp: February 22, 2024, 12:56:26 pm
content: don't double post for the same ic subject .....

author: CaptDon
author_rank: Super Contributor
timestamp: February 22, 2024, 02:20:01 pm
content: You ripped the plated through copper right out of the board!!! If it is simply a double sided board you have your work cut out for you indeed as you MUST solder both sides of the board to establish connection. You can't simply "Fill the holes with lots of solder", it still won't guarantee connection on the opposite side!! In fact the solder may not even wick down through at all. If it is a multi-layer board (more than double sided) you may as well use it for target practice as you will never be able to properly repair it. One of the worst de-soldering hacks I have seen in a while.

author: abdolah
author_rank: Regular Contributor
timestamp: February 22, 2024, 07:05:00 pm
content: Yeah thats what I will do .The coper vias came out because my soldering iron is not good . It didn't melt all the solder inside. I added fluks and it helped a bitBut I think the safest way to do it is using a desoldering stationThanks for your help and time

author: abdolah
author_rank: Regular Contributor
timestamp: February 22, 2024, 07:07:17 pm
content: I didn't. The first topic was on identifying the ic and what it's doingThe second topic is for equivalent