MOSFET in V3

Forums General Questions and Comments MOSFET in V3

Viewing 2 reply threads
  • Author
    Posts
    • #2280 Reply
      Lucian
      Guest

      Hello
      In dC v3, are the mosfets P or N channel (at the valve)? Can I use IRL520 if is a P channel?
      Thank You

    • #2282 Reply
      Martyn
      Keymaster

      The mosfets controlling the solenoid valves are N Channel and need to be logic level.

      N channel – switching low side (ground)
      Logic level – saturated at 3v-5v. Typically 4.5v.
      Also need as low a RDSon as possible.

      I am currently using IRL540s but these are end of life and there are now better options available (perfectly fine if this is what you have though). Once I find a replacement I will add a comment to the post.

      When looking for a suitable mosfet. Look for one that has a logic level voltage stated in the data sheet. It needs to give the RDSon value (in ohms) for 4.5v or 5v. If it only says 10v or 20v then its not logic level.

      For the IRL540
      Drain-Source On-State Resistance
      Symbol = RDSon
      VGS = 5.0V. ID=17A, resistance=0.077 ohm
      VGS = 4.0V. ID=14A, resistance=0.11 ohm

      • This reply was modified 2 years, 4 months ago by Martyn.
      • #2354 Reply
        Manish
        Guest

        what is the reason of switching to MOSFET, any benefits as compared to TIP120

    • #2356 Reply
      Martyn
      Keymaster

      No voltage drop (TIPxxx have a bout a 2v voltage drop) and a switching speed improvement although this makes no real difference when controlling solenoids.

      On the other side. TIPxxxs are more robust.

Viewing 2 reply threads
Reply To: MOSFET in V3
Your information: