mosfet driver helps from conroller

[deepakchikane]

Dear all,

i am looking for to drive a mosfets through a controller.

as my controller is not able to give 600 ma current..

are there any control logic between controller & mosfet gate by using ics (cost effective)..??

pls post some of the schematics or give idea which stucks in your brains..

 

[DgTRoniX_Yogesh]

Mosfet drive circuit for microcontrollers

:arrow::arrow:
You must use a gate driving circuit with isolation ( for high power application) , The purpose of it is that it will provide sufficient power to the MOSFET's gate to turn ON/OFF.

 

[sankar.m8]

What is the VDS of the MOSFET you are using? Check this MIC5018, which will operate in 3.3V input & can drive MOSFET with 12V Vds maximum. Hope this solve your problem.

 

[irfan ahmad]

Use this one.

0.1$ solution.

 

[deepakchikane]

what is the vds of the mosfet you are using? Check this mic5018, which will operate in 3.3v input & can drive mosfet with 12v vds maximum. Hope this solve your problem.

hi,
mic 5018 will not give that much current to drive the mosfet??
M using fdd 8870

- - - Updated - - -

Use this one.
View attachment 106029
0.1$ solution.

THIS IS OUTDATED IRFAN..

 

[irfan ahmad]

So then you can use this one.
Tested driver and working well.

 

[pilko]

@deepakchikane, What is wrong with Irfan's first proposal and why is it outdated?

 

[D.A.(Tony)Stewart]

Many Gate driver Opto questions. Here is the same answer I give. Many choices depending on loads and speed.

https://www.digikey.ca/product-sear...=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25

 

[zzllearner]

So then you can use this one.
Tested driver and working well.
View attachment 106065

why did you use two transistors in your design.It can be achieve by only one transistor. what's the advantage of your design?
thank you in advance.

 

[deepakchikane]

why did you use two transistors in your design.it can be achieve by only one transistor. What's the advantage of your design?
Thank you in advance.

it is for fast turn off of mosfet (to discharge gate capacitance)

 

[mrinalmani]

Clarify the problem further. Is the ground of the MOSFET isolated or non-isolated. If it is non isolated then...
1. Use a drive BJT to amplify 5mA from the MCU to about 50mA.
2. Then use this 50mA to drive the input of a totem-pole.
3. Finally drive the MOSFET from the output of the totem-pole

This method is fast, total delay of all stages combined should be less than 30ns
Its is also cost-effective. The driver circuitry should cost less than Rs.20/- (0.3$) @100 units.