drain-to-Source Breakdown Voltage

Discussion in 'General Electronics Chat' started by 1:1, Jan 30, 2007.

  1. 1:1

    Thread Starter Member

    Jan 25, 2007
    27
    0
    Hai forum member,

    Refer to power MOSFET, what does drain-to-Source Breakdown Voltage mean, and how it effect on selection?


    Tokeda
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    That is the maximum voltage the device is designed to withstand. Exceed it, and the FET will break down electrically. So, if you have a circuit that need 80 volts to be switched, don't try it with a 60 volt rated FET.
     
  3. 1:1

    Thread Starter Member

    Jan 25, 2007
    27
    0
    Thank beenthere,

    It seem sensible enough for me. I have another question need help on it.
    My original project are using a single irf7389 HEXFET Power MOSFET (provide by IR), but due to some reason, i change it by using one SUP75P03-07 & SUP45N03-13L (both provide by Vishay). Could anyone help me look thru is that any problem with my changing?

    http://www.irf.com/product-info/datasheets/data/irf7389.pdf (Link for irf7389)

    http://www.vishay.com/docs/70804/70804.pdf (Link for SUP45N03-13L)

    http://www.vishay.com/docs/71109/71109.pdf (Link for SUP75P03-07)

    I was struggling on it, really need some one to help.


    Thank you,

    Tokeda
     
  4. dragan733

    Senior Member

    Dec 12, 2004
    152
    0
    1:1,

    What is the load current and load voltage at your project?
     
  5. 1:1

    Thread Starter Member

    Jan 25, 2007
    27
    0
    Thank dragan733,

    The load voltage will be 15 volt.

    Tokeda,
     
  6. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    144
    You may find this tutorial of use to help you understand drain-source breakdown voltage and its effect on high-voltage Power MOSFETs.

    Dave
     
  7. 1:1

    Thread Starter Member

    Jan 25, 2007
    27
    0
    Thank Dave, it is an excellent resources.


    Tokeda
     
  8. 1:1

    Thread Starter Member

    Jan 25, 2007
    27
    0
    I was wonder is there any H-bridge chip are available in the market that able to drive by PWM (microcontroller) instead of using 4 Power MOSFET (2 N-channel & 2- P-channel)to fulfill the same task.

    Tokeda
     
  9. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
  10. 1:1

    Thread Starter Member

    Jan 25, 2007
    27
    0
    Thanks mrmeval,

    But problem is, the motor is drive by microcontroller ECCP module, imply that have four logic input, so may be the H- bridge show at link above is not particular suitable and the selective motor is drive by 15volt.

    Tokeda
     
  11. dragan733

    Senior Member

    Dec 12, 2004
    152
    0
    Therefore, the control signal is with same voltage as the load voltage, and the control signal has same ground as the load voltage. And what is the problem?
     
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