Hai forum member,

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


Tokeda

 

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.

 

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

 

1:1,

What is the load current and load voltage at your project?

 

Thank dragan733,

The load voltage will be 15 volt.

Tokeda,

 

Hai forum member,

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


Tokeda

You may find this tutorial of use to help you understand drain-source breakdown voltage and its effect on high-voltage Power MOSFETs.

Dave

 

Thank Dave, it is an excellent resources.


Tokeda

 

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

 

Yes there are. Use the search feature at the top of the page and search this forum for the term
h-bridge

Some examples
http://www.patronic.com/motordrivers/motordrivers.html

 

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

 

Thank dragan733,

The load voltage will be 15 volt.

Tokeda,

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?

 

I am using a 5VDC circuit where I need a P channel MOSFET with the following characteristics:
Drain current at least 200 ma - Drain to Source voltage at least 8 volts . I looked up NTE's datesheet and it lists several MOSFETS but the Drain to Source voltage says 55 Min or 100 Min, or 200 Min. I'm assuming (Min) means minimum? So these MOSFETS are not suitable for a 5 VDC supply? Am I reading this wrong? Can anyone help me to find a part number of a MOSFET thats meets my needs? Any help would be appreciated.