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

[SOLVED] Power MOSFET Gate resistor design

Status
Not open for further replies.
D

darkseid

Member level 1
Joined
Nov 9, 2010
Messages
40
Helped
5
Reputation
10
Reaction score
4
Trophy points
1,288
Activity points
1,536
Dear All

I want to know if there is any design criteria for the resistor placed between the gate of Power MOSFET (eg. IRF540) and the driving source (The driving source is an op amp and not a MOSFET driver IC).
 

What's your purpose for this resistior? To reduce power mos slew rate?
 

A gate resistor is generally used to control switching time, so first you need to specify that. You also need to know the effective gate capacitance. You need a resistor that combines with the gate capacitance to give a RC time constant around what your desired switching time is. From there just experiment until you get it right.
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top