+ Post New Thread
Page 2 of 2 FirstFirst 1 2
Results 21 to 22 of 22
  1. #21
    Advanced Member level 5
    Points: 11,053, Level: 25

    Join Date
    Aug 2015
    Posts
    1,792
    Helped
    666 / 666
    Points
    11,053
    Level
    25

    Re: 7Amp Heater and PWM using MOSFET

    the real circuit is the unknown here - as said above if there is significant wiring L - then there will be avalanche clamping losses as well as switching losses - thus 10oHz may be a limiting figure - also how is the fet heatsunk? none? some ...?



    •   AltAdvertisement

        
       

  2. #22
    Newbie level 5
    Points: 113, Level: 1

    Join Date
    Apr 2019
    Posts
    9
    Helped
    0 / 0
    Points
    113
    Level
    1

    Re: 7Amp Heater and PWM using MOSFET

    Quote Originally Posted by dick_freebird View Post
    There are now some isolating MOSFET drivers which ought
    to be interesting to the real world interfacing uC folks.

    https://www.google.com/search?client...ed+Gate+Driver

    Talking 5 bucks a pop, but what's non-popping your dev
    board worth? Lots of vendors to look through and the
    distributors too, behind that link.

    Tthank you for helping, I have now TLP250 MOSFET driver, but my power supply for this project is multi-output 12 and 5 Vdc,
    and the ground is not isolated so the anode ground pin3 and GUD pin5 also the load will share the same ground.is that makes the microcontroller not isolated? or there is a solution to this problem without changing the power supply?

    Click image for larger version. 

Name:	isolated-MOSFET-driver-TLP250-as-a-low-side-driver.jpg 
Views:	8 
Size:	34.6 KB 
ID:	155193



--[[ ]]--