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JeeLabs MOSFET Plug jcw

A small board containing two high-power MOSFETs for switching DC loads

jeelabs.net/projects/hardware/wiki/MOSFET_Plug

Recent activity:

  • 9600 updated7 years ago
  • psd pushed7 years ago
  • psd pushed7 years ago
  • 9600 pushed7 years ago

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Description

The MOSFET Plug is a small board containing two high-power MOSFETs for switching DC loads.

The IRLZ34N's used here should be able to drive over 5A @ 50V, but this will require a heatsink. For use without heatsink, a maximum currrent of up to 3 amps should work fine. Just keep in mind that MOSFETs can generate a few watts of heat when used continuously at 2A or more. You can tie the MOSFETs in parallel for larger currents.

The terminal blocks used on this plug are heavy duty and detachable and use a standard 0.2" grid (5.08 mm). The two outputs have separate connectors.

The pins are laid out as two pairs: one side must be tied to ground, the other side (+A or +D) is then tied to the load, which in turn gets connected to a positive supply voltage (3..50V). Note that the positive supply voltage used by the load is not connected to the plug.

This plug ties the plug and the load grounds together - it is not isolated from the load power supply.

This plug can be operated at 5V as well as 3.3V.

This board uses the conventions of a JeePlug and can be used with the ports on a JeeNode. It can also be used with other boards and MCU's, if you hook it up properly and adapt the interface code for it.

Schematic

Board

Bill of Materials

Designator Value Description
IC-A IRLZ34N HEXFET Power MOSFET
IC-D IRLZ34N HEXFET Power MOSFET
PORT1 JEEPORT PIN HEADER
R-A 10k Resistor
R-D 10k Resistor
SJ1 SOLDERJUMPERTRACE Solder Jumper
X1 OUT WAGO SCREW CLAMP

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This project is © Jean-Claude Wippler, and is published under the terms of the Creative Commons Attribution 3.0 Unported licence.