N Channel MOSFET testing

Tool suggestions, soldering tips, general useful electronics knowhow.
Post Reply
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

N Channel MOSFET testing

Post by Steve »

Hello,

Hey guys, I've recently got a new SSP6N60A mosfet to repair a power supply but the usual mosfet switch testing method doesn't seem to be working. I have tried the switch capacitance test, putting negative on the source, positive on the gate for a moment, then positive on drain. The mosfet does not seem to be opening as it should (MM in diode mode) I am thinking it is defective. What do you guys think?

Datasheet: https://www.exxosforum.co.uk/atari/last/psu/SSP6N60.pdf


Thanks,
User avatar
exxos
Site Admin
Site Admin
Posts: 23488
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: N Channel MOSFET testing

Post by exxos »

Test it properly...

PRH0H.png
PRH0H.png (32.49 KiB) Viewed 3140 times

EDIT:

I would suggest using a 12V source as not all mosfets will turn on below 5V or thereabouts. I've not checked.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: N Channel MOSFET testing

Post by Steve »

@exxos One more thing sorry, should a SSP6N60A be compatible with a SSP6N60? I can't seem to find a seperate datasheet to distinguish them.
cmorley
Posts: 291
Joined: Tue May 28, 2019 5:46 pm

Re: N Channel MOSFET testing

Post by cmorley »

Steve wrote: Fri Nov 13, 2020 3:29 pm @exxos One more thing sorry, should a SSP6N60A be compatible with a SSP6N60? I can't seem to find a seperate datasheet to distinguish them.
Note (4) at the bottom of page #2
User avatar
exxos
Site Admin
Site Admin
Posts: 23488
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Re: N Channel MOSFET testing

Post by exxos »

Capture.PNG
Capture.PNG (21.31 KiB) Viewed 3129 times
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Steve
Posts: 2570
Joined: Fri Sep 15, 2017 11:49 am

Re: N Channel MOSFET testing

Post by Steve »

@cmorley Oh cheers didn't see that. So this is an ultra low RDSon varient. I don't know if this is significant to the PSU operating requirements, it's a phihong psm-5341. Datasheet attached. Do you have any thoughts? cheers
Attachments
PSU_PSM-5341.pdf
(3.81 MiB) Downloaded 131 times
pixelpusher
Posts: 117
Joined: Fri Dec 27, 2019 9:01 pm

Re: N Channel MOSFET testing

Post by pixelpusher »

One question regarding the SSP6N60 (mentioned in the "last PSU upgrade"): Is there any practical gain over a (working) MTP6N60 that would warrant a replacement?

Best,
Post Reply

Return to “ELECTRONICS”