I want to drive this n-type MOSFET by a 24V input Signal. Because of the max being Vgs=20V I want to set Vgs to 10V.


simulate this circuit – Schematic created using CircuitLab

Is this ok for building the circuit or do you have any other suggestions?

(Switching frequency <2Hz)

An alternative for the MOSFET presented above is this one.

  • \$\begingroup\$ You'd be better off using the build in schematic editor to make that readable. \$\endgroup\$ – David Nov 17 '14 at 14:30
  • \$\begingroup\$ Congratulations! It'll work, or so it appears... :-) It would help if you'd add proper reference designations and values to all of the components. \$\endgroup\$ – EM Fields Nov 17 '14 at 14:42
  • \$\begingroup\$ Thank you, the schematic editor is many times more suitable... I don't really know the type of the other devices. I think D2 will be 1N5819, D1 a standard 10V-z-diode, M1 is a given motor with 3.3V and 3A power characteristic and SW1 an 24V-output of a PLC control. \$\endgroup\$ – Findus Nov 17 '14 at 15:04
  • \$\begingroup\$ Just as an aside, the circuit would work a little better (the gate capacitance would discharge more quickly) if you changed R1 to 470 ohms, plus you could then get rid of the Zener. \$\endgroup\$ – EM Fields Nov 17 '14 at 15:08

You can use a mosfet driver is more suitable for this kind of applications. You have an exemple of an mosfet driver http://cds.linear.com/docs/en/application-note/an53.pdf.

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  • 2
    \$\begingroup\$ At 2Hz, and with the switch driving a MOSFET driver, a MOSFET driver would be way overkill. \$\endgroup\$ – EM Fields Nov 17 '14 at 14:49

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