Electronics > Projects, Designs, and Technical Stuff
Suggestion needed to chose a perfect high side n-MOSFET driver
jonroger:
Adding to the above - put a 50 ohm resistor on the OUT pin.
SiliconWizard:
--- Quote from: Nilesh on March 29, 2019, 08:10:27 am ---Question-
The microchip you suggested seems to be a low side driver. Will that be fine for my circuit?? since I will need a high side driver I believe!!!
--- End quote ---
Yes, since it will be part of your floating PWM controller. Power it with your floating 9V supply.
soldar:
I find this way easier to analyze.
soldar:
I believe an improvement is the Cuk converter and SEPIC.
emu_herder:
Re: High side drivers. The reason they exist is because you need to drive the gate of a FET above its source to turn it on. In a half bridge, the source of the high side FET is above ground, so the high side driver has some way to float its output ground to the same voltage as the source of the FET. Most commonly with a "bootstrap", which is essentially just a capacitor used as a floating supply.
In this case, you've already floated your drive circuit with its reference at the source of the FET, so nothing special is needed in whatever drive circuit you choose to use. Any low side driver is fine.
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