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Explorer II
September 3, 2024
Question

Use MOSFETS with STM32 to power up sensors

  • September 3, 2024
  • 1 reply
  • 1390 views

Hello everyone! 

I want to use some MOSFETS to individually power up/down sensors on a PCB. Here's the schematics : 

yaxsomo_0-1725350654452.png

 

The MOSFET is a DMG1012T-7 (N-Channel) and here's it's datasheet : 

https://www.lcsc.com/datasheet/lcsc_datasheet_1809050424_Diodes-Incorporated-DMG1012T-7_C20512.pdf

All the sensors runs on 3.3V and the maximum power draw for a single sensor is 14.34 mA max.

What do you think about this? Is it a good practice ?

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    1 reply

    yaxsomoAuthor
    Explorer II
    September 3, 2024

    I think I made a huge mistake! As they are N-Channel MOSFETS, they're supposed to switch the "low side" of a load. So the previous schematics are totally wrong..

    Here's the correction : 

    yaxsomo_0-1725363346340.png