Would this be a good choice for my Wolverine with 64v rails? https://www.mouser.com/ProductDetail/512-FDP045N10A_F102
I used IRF150P220XKMA1, which is a 200 amp device with 2.7 millivolt max drop which is fantastic for higher power amps since it is almost a perfect switch.
This device is unfortunately no longer manufactured but there are equivalents.
This device is unfortunately no longer manufactured but there are equivalents.
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Thank you for the response! Any idea whether these would work? https://www.mouser.com/ProductDetail/?qs=eP2BKZSCXI7BhML/B2CYDg==
Looks like they would. The idea is to bias it such that it is always at its lowest possible Rds resistance (5 milliohms) (minimum 6 volts, preferably more) without obviously blowing it up, so that it has minimal effect on the output as a switch.
Besides the MOSFET, you should also think about an appropriate TVS, described in post #156 (I think the question if (Mosfet Vds) > (2x PSU_V+) is really necessary if you use a TVS etc. is not yet answered).
Additionally, in the doc of Bonsai's SSR board, you can find a list of generally suitable MOSFETS.
In my case of +-59V rails, I used P6KE75CA TVS and IPP041N12N3GXKSA1 MOSFETs (lower RDSon is better).
Hm, in this case your rail voltage is too high for a P6KE68CA (Vr=58.1V) and the MOSFETs Vds is too low for a P6KE75CA (Vc=103V).
Life on the edge - it looks like the P6KE6.8CA might work if I took the rails down a volt or two? No, I see that won't work.
Use the P6KE75CA and pray/prepare to lose the mosfets, I guess.
Use the P6KE75CA and pray/prepare to lose the mosfets, I guess.
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It’s not about cost. Most 150 and 200V low Rds mosfets (the kind you want for this application) are out of stock right now. Have been for a while. I still have 125 SUP90142E’s on order, and every month the estimated ship date changes.
100 volt available all over the place.
100 volt available all over the place.
These are in stock at Digikey:
IRF150P220AKMA1
150 volt, 2.7 mohms, 200 amps
https://www.digikey.com/en/products/detail/infineon-technologies/IRF150P220AKMA1/13693948
IRF150P220AKMA1
150 volt, 2.7 mohms, 200 amps
https://www.digikey.com/en/products/detail/infineon-technologies/IRF150P220AKMA1/13693948
Thanks - Mouser search, short memory, I do apppreciate the reassurance. I made an error previously just looking at some general instructions and focusing on RDSon, so I wanted to be sure I wasn't missing something this time.
