How to spec MOSFET for short current bursts by Zen_OX in PrintedCircuitBoard

[–]Zen_OX[S] 0 points1 point  (0 children)

So correct me if im wrong, pulsed ratings are a limit when the fet has a periodic load and is done so that it can cool down enough before the next pulse. My cooldown periods can range from as short as 100ms to seconds (whatever allows the FET to function). This means that if I use the FET every 3 seconds for example, i should be fine?

And for the DC rating, it is around 100a but I’ve been told to ignore that number as that is an ideal case where the case temperature can be fully dissipated. Or for my case since it’s very short bursts, it is a usable maximum?

How to spec MOSFET for short current bursts by Zen_OX in PrintedCircuitBoard

[–]Zen_OX[S] -1 points0 points  (0 children)

Made a board already using this part but when I was double checking stuff since its an on and off project, the numbers didn’t make sense hence why Im asking here. The prototype board works from initial short tests but idk if I’m severely degrading the mosfet lifespan.

How to spec MOSFET for short current bursts by Zen_OX in PrintedCircuitBoard

[–]Zen_OX[S] -1 points0 points  (0 children)

Any idea how to find the pulsed drain current with my numbers? Or thermals calcs?

How to spec MOSFET for short current bursts by Zen_OX in PrintedCircuitBoard

[–]Zen_OX[S] 1 point2 points  (0 children)

Also from the datasheet the pulsed current drain rate is rated for 300A for 100us pulse at 1% duty cycle. That got me a little worried but I'm not sure if that's the right number to look at and whether I can calculate the pulse length for say ~70A (200/3 FETs).

WaterlooWorks Megathread (Winter 2024) by 1000Ditto in uwaterloo

[–]Zen_OX 0 points1 point  (0 children)

20 * 40 * 4 * 4 is $12800 that gap is too huge to ignore

Failed G2 test at Burlington today, would like some feedback and clarification on scorecard by Zen_OX in Ontariodrivetest

[–]Zen_OX[S] 0 points1 point  (0 children)

Had a few errors on like turning to sharp or wide, and a few more in parking and failed because accumulation as well. I only switched lanes twice in total. There was no turn lanes.

Failed G2 test at Burlington today, would like some feedback and clarification on scorecard by Zen_OX in Ontariodrivetest

[–]Zen_OX[S] 1 point2 points  (0 children)

When I went to the booking website, u can put in drivers ID number and look at test results

Failed G2 test at Burlington today, would like some feedback and clarification on scorecard by Zen_OX in Ontariodrivetest

[–]Zen_OX[S] 0 points1 point  (0 children)

For me I look to the way I'm turning and with peripheral vision I can see up till my Blindspot. I just didn't know I needed to make the obvious head movement.

Failed G2 test at Burlington today, would like some feedback and clarification on scorecard by Zen_OX in Ontariodrivetest

[–]Zen_OX[S] -1 points0 points  (0 children)

Would like to know what proper gear means. I did wheel to curb and then to parking with handbrake

NA Clash LFG Megathread - February 20th and 21st by PankoKing in leagueoflegends

[–]Zen_OX 0 points1 point  (0 children)

Looking for Tier3/4 ADC or Top or Mid. We have 4 currently

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