Controlling 20V path from 5V

Discussion in 'General Electronics Chat' started by safia, Jan 26, 2016.

  1. safia

    Thread Starter New Member

    May 29, 2013
    11
    0
    Hi ,
    I would like to pass/stop 20V (2MHz)switching signal using 5V in cadence. as shown below with stand alone switch and its application to buck converter in two way switch.
    5V control is selectable: it should enable one path at time if we select 5V and other when 0V is applied or any other scheme can be suggested. highvolcontrol.png

    Thanks
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,006
    3,232
    You explanation is confusing. o_O
    What "5v control" are you referring to?
    What alternate "path" ?
     
  3. safia

    Thread Starter New Member

    May 29, 2013
    11
    0
    i mean using 5V can we control 20V path. we can do using transmission gates if the path has a voltage of 5V also , but here is 20V
     
  4. PeterCoxSmith

    Member

    Feb 23, 2015
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    38
  5. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,797
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    Can't you simply use the 5v to enable/disable the driver?
     
  6. safia

    Thread Starter New Member

    May 29, 2013
    11
    0
    Actually, i want to desgin it from MOSFET level circuit in cadence or any other tool
     
  7. safia

    Thread Starter New Member

    May 29, 2013
    11
    0
  8. PeterCoxSmith

    Member

    Feb 23, 2015
    148
    38
    if you look at the Fairchild Mosfet drive datasheet that I linked to, there is a good block diagram of what you need to do to design your own driver, if that is what your aim is...

     
    safia likes this.
  9. crutschow

    Expert

    Mar 14, 2008
    13,006
    3,232
    To control voltages greater than 5V you will need a MOSFET that has a power supply voltage also greater than 5V.
    Don't know of any way to control a voltage higher than your supply voltage.
     
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