Component with no datasheet

[Alimash]

Hello
I am troubleshooting a couple of coolmaster ATX power supplies.
I suspected that the faulty components are the sps supervisor IC's labeled "IN1S313I" and"IN1S424I".
I couldn't find any information about them online exept for their name, role and the manufacturer witch is "infsitronix".
No datasheet, no pinout, i even tried to email infsitronix but no reply so far.
I can't find a supplier to buy it either.
Any help of how to test it and where to buy/order it is appreciated.

Regards.

 

[kellys_eye]

Those look to be 'in-house' markings and possibly the equivalents of LM393 and TL494 respectively. We might be able to confirm that if you post a good image of the board and the part locations.

 

[Alimash]

Those look to be 'in-house' markings and possibly the equivalents of LM393 and TL494 respectively. We might be able to confirm that if you post a good image of the board and the part locations.

I am sure that this isn't the case, the parts you mentioned are op amps/comparators while the parts above monitors the 3.3v, 5v and 12v rails in the atx power supply and give a power ok signal if the the voltages are above a specified threshold.

 

[kellys_eye]

We might be able to confirm that if you post a good image of the board and the part locations.

The TL494 is a PWM controller specifically for SMPS devices and very common in many ATX PSUs.

The LM393 is a dual comparator and ideal for monitoring voltage levels - but I should have said LM339, a quad device.

What are the actual fault symptoms?

 

[Delta Prime]

This is as close as I can get. But you have to sign up to get that data sheet.
By the way cybernetics is also looking for that chip.
If you find it...destroy it...
They made a movie about it people!!!

Supervisor IC IN1S429I datasheet, EVGA PSU - Badcaps

Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

www.badcaps.net

 

[Alimash]

The TL494 is a PWM controller specifically for SMPS devices and very common in many ATX PSUs.

The LM393 is a dual comparator and ideal for monitoring voltage levels - but I should have said LM339, a quad device.

What are the actual fault symptoms?

You're right the chips you mentioned are common.
The symptoms are:
One psu does have a stanby voltage "purple wire" and a power ok signal "green wire" but no outputs(3.3v,5v,12v) and when i power up the "IN1S313I " chip from my bench power supply(i managed to figure out the Vcc pin) it draw about a half ampere and it gets very hot.
The other one don't even have standby voltage.

 

[Alimash]

This is as close as I can get. But you have to sign up to get that data sheet.
By the way cybernetics is also looking for that chip.
If you find it...destroy it...
They made a movie about it people!!!

Supervisor IC IN1S429I datasheet, EVGA PSU - Badcaps

Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

www.badcaps.net

Thanks a lot, this is helpful.
Though the IN1S424I is 16 pin not 14, i am afraid to fry the chip the Vcc pin was not the same.

 

[Delta Prime]

Yes I realize that. But sometimes nice members in forms like this contribute to the discussion and provide additional information. it was a long shot. Good luck to you!

 

[kellys_eye]

it draw about a half ampere and it gets very hot.

Clearly a fault! Have you checked the MOSFETs for shorts? If they are ok then change the chip - assuming we can determine its type. If you post a clear, close-up picture of the circuit board we can figure out which device it probably is.

 

[Alimash]

Yes I realize that. But sometimes nice members in forms like this contribute to the discussion and provide additional information. it was a long shot. Good luck to you!

Thanks

 

[Alimash]

Clearly a fault! Have you checked the MOSFETs for shorts? If they are ok then change the chip - assuming we can determine its type. If you post a clear, close-up picture of the circuit board we can figure out which device it probably is.

Okay first things tomorrow