Gate driver for MOSFET ?

Thread Starter

sbkenn

Joined Apr 15, 2017
19
Hi. I also, am new to using MosFETs/drivers. The impression that I have is that, if you are using them at high frequency (in my case, 100kHz flyback converter), that the drivers supply enough current to quickly charge the GS capacitance and reduce the turn on and off times to increase switching efficiency. This assumes that the uC output would have been high enough to turn the MosFET fully in in the first place. If that doesn't apply, then the driver would also provide the voltage to do that.
 

danadak

Joined Mar 10, 2018
3,578
Generally correct on all points.

Keep in mind there are some large currents involved and signal routing quite
important if your design has mixed signal in it as well.

And generally use of a series R between gate and driver to mitigate board and package
L undesired effects.

http://www.tij.co.jp/jp/lit/an/slla385/slla385.pdf

https://toshiba.semicon-storage.com/info/docget.jsp?did=59460

PCB Layout -

http://www.cypress.com/files/an57821-psoc-3-psoc-4-and-psoc-5lp-mixed-signal-circuit-board-layout-considerationspdf

http://www.hottconsultants.com/pdf_files/june2001pcd_mixedsignal.pdf

https://www.teledyne-e2v.com/content/uploads/2018/12/0999B_Board_Layout_AN.pdf



Regards, Dana.
 
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