Bootstrap N-MOSFET high side switching.

214

04:32:29

High side N channel MOSFET switching with bootstrap circuit.

published 7 years ago

eekee

7 years ago

Interesting, but draws more current when off than on: 30.1mA vs. 18.3mA. Perhaps you want to increase the width of the MOSFET to drive a greater load? And I don't think you meant to connect ground there.

hurz

7 years ago

@eekee, ground here makes sense for this demonstration, cuz the voltage gate source is in focus.

benarmstrong89

7 years ago

eekee, the low current draw when on was mainly due to the lamp set to only 480mW, I modified it to show bigger load switching. And as hurz pointed out, the ground is placed there to focus on gate voltage.

benarmstrong89

7 years ago

eekee, you could reduce the off current draw by increasing the value of the gate resistor, at the cost of losing switching speed, as you need to keep in mind the gate capacitance.

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