Triggering mosfet with opamps

[deepakchikane]

Dear all..

1)i want to trigger a mosfet with the help of lm 358 op-amp
problems,
a)lm 358 is having 50ma sourcing current capability but my irf 730 needs atleast 2 amp peak gate current..

How i can get 2 amp from 50 ma..

If u have any circuits,idea or any designs,please explains

my brain is not working..

Plz plz plz

 

[pradeep.g.belchada]

who told you irf730 requires 2a gate current ?

 

[deepakchikane]

PRADEEP
calculate from the datasheet...
i=q/t
where q & t mentions..

 

[dick_freebird]

You need stiff current drive for hard switching, but if this
is an analog function (closed loop follower, or some such)
I recommend that you turn the limitation into a virtue,
put your frequency compensation at the weak node
(perhaps using an uncompensated or non-unity-gain-
stable op amp to recoup some bandwidth and simplify
the comp / stability). But you also should make some
effort to ensure that the FET is actually capable of
operating in high-dissipation regions continuously, if
continuous analog operation is your application. Some
FETs aren't good for linear operation.

 

[kabeer02]

who told you irf730 requires 2a gate current ?

Mosfet is not like transistors , mosfet need Vgs not gate current