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Old 06-02-2013, 02:22 PM   #6149 (permalink)
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Originally Posted by jackbauer View Post
Re-moc is alive! Video uploading .........
...where is this video , please? ( I have checked your youtub profile but is not there)

After my second set of mosfet failed, I have decided to put more of them in TO220 case
- I want to change IRFP4668PbF for irfb4115gpbf (150V 11mohm 70A ) 22 pieces

1. I want to ask is mic4451YN can manage those 22 mosfets? And do I need to change resistors gate parametrs ?

Data S:

MOSFET Ciss Input Capacitance ––– 5270 ––– pF x22=115940 pF
mic load drive is 62000 Pf looks it is not good
or I need to check just Gate-to-Source Forward Leakage it is 100nA and mic can work on 2A - I am not so sure is this is OK.

2. What about resistors, have they need to be amended?

3. Another important question I aware my fail could happened becouse of spikes from motor could produce over voltage - can I protect my controler with some kind diode or transil installed on motor? (Motor parametrs 80V 200A 13.5 KW DCseries)

For any help thank you in advance.

Last edited by SEBART PL; 06-02-2013 at 05:04 PM..
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