Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Triggering mosfet with opamps

Status
Not open for further replies.
D

deepakchikane

Full Member level 3
Joined
Jul 17, 2012
Messages
178
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Location
Mumbai, Maharashtra, India, India
Activity points
2,623
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
 

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.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top