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Topic: MOSFET-NCHANNEL DMN3404L-7; on 3.3V system (Read 196 times) previous topic - next topic

SouthernAtHeart

Feb 23, 2018, 12:42 am Last Edit: Feb 23, 2018, 12:44 am by SouthernAtHeart
I've used the SMD N channel MOSFET with numerous different arduino projects, to PWM things up to a couple amps. The chip is rated at 5.8amps.  But I've always used it with a 5 volt PCB.
This project is a 3.3V board, but I'm assuming it will work ok?  I've always had the gate of the MOSFET connected directly to the a digital pin, as per recommendation found here on the forum.  Will the 3.3volt work to properly turn on the gate as the 5 volt did?
(I'll be using PWM from the digital pin, to control a 12 volt DC fan that draws about 500mA max.
thanks.


I've added PDF files of my schematic and layout.  The PCB is a Thermocouple/fan controller shield for a Wemos D1 Mini PRO.

pylon

Quote
Will the 3.3volt work to properly turn on the gate as the 5 volt did?
According to the datasheet this should be the case. Starting at a bit above 2.5V (GS voltage) the MOSFET is a saturated to the specified current.

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