Created by
Created June 10, 2019
Last modified June 11, 2019
Tags mosfet   power   switching  


Corrected application of an IRF540 MOSFET to switch a load. Not ideal for fast-switching/PWM as shown.


Revised basic MOSFET switch - simplistic, but works.

This is the corrected reference circuit for . Unlike the first circuit the MOSFET is on the low-side of the load so VS ≈ 0V and VGS ≈ 12V, well and truly enough to drive the gate.

See for the incorrect version.

Note that this version doesn't include any gate driver circuit to enhance on/off performance, so it'll probably perform poorly for fast switching.


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