Re[2]: LF: Protecting a MOSFET driver chip from MOSFET failure?

[Chris Wilson <chris@chriswilson.tv>]

Hello Andy,

Monday, August 10, 2015


> No, capacitive coupling with diode restorationends up with
> near-enough  the same voltage applied to the gate as you had in thr first 
> place.


> A 0/12v output from the driver chips ends up at -0.7 /+ 11.3 V (assuming 0.7V 
> diode drop)




> As for the question of the dual drive with resistors.    The
> resistors may as well say in, just to smooth off edges and reduce
> dissipation in the driver.     i doubt you'll notice any difference.


> Andy  G4JNT

OK, thanks and sorry for the naive questions, lots to learn, I was
amused by my friend calling power FET's "Fire Emitting Transistors". I
see his point now, they do go with a good bang and sizzle! The wife
smelt them downstairs and asked wearily if it meant a longer wait
before a job she attached great importance to, but I classed as a
boring irrelevance, got done...







-- 
Best regards,
 Chris                            mailto:chris@chriswilson.tv