Mosfet question

[Boxster]

Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain to
source is 200V. I would like to know what is the maximun voltage that can be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

Thanks!! in advance

Richard

 

[Richard Rasker]

On Thu, 18 Mar 2004 22:23:55 -0800, Boxster wrote:

Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain to
source is 200V. I would like to know what is the maximun voltage that can be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

Well, I think you overlooked it then; the datasheet mentions +/-20V as the
absolute maximum Vgs rating, 4V as threshold voltage and +10V as practical
'on' state voltage.

Richard Rasker

--
Linetec Translation and Technology Services

http://www.linetec.nl/

 

[Spehro Pefhany]

On Thu, 18 Mar 2004 22:23:55 -0800, the renowned "Boxster"
<richardcai@myrealbox.com> wrote:

Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain to
source is 200V. I would like to know what is the maximun voltage that can be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

+/-20V relative to the source. And it is on every manufacturer's data
sheet.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Gilbert Mouget]

In article <c3cc8g$apu$1@mawar.singnet.com.sg>,
dated Thu, 18 Mar 2004 22:23:55 -0800,
Boxster, <richardcai@myrealbox.com> says...

Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain to
source is 200V. I would like to know what is the maximun voltage that can be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

It is specified in the datasheet :

http://www.semiconductors.philips.com/acrobat/datasheets/IRF640_S_1.pdf

Gate-source maximum voltage ą 20 V
Gate-source operating voltage 0 +10 V

--
"You cannot move mountains if you believe them to be mountains.
You must think of them as collections of small stones,
Which can be moved one at a time, and then reassembled."
-- The Tao of Meow

 

[Boxster]

Gilbert Mouget <prenom.nom@free.fr.invalid> wrote in message
news:4059bfa3$0$290$626a14ce@news.free.fr...

In article <c3cc8g$apu$1@mawar.singnet.com.sg>,
dated Thu, 18 Mar 2004 22:23:55 -0800,
Boxster, <richardcai@myrealbox.com> says...


Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain to
source is 200V. I would like to know what is the maximun voltage that
can be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

It is specified in the datasheet :

http://www.semiconductors.philips.com/acrobat/datasheets/IRF640_S_1.pdf

Gate-source maximum voltage ą 20 V
Gate-source operating voltage 0 +10 V

--
"You cannot move mountains if you believe them to be mountains.
You must think of them as collections of small stones,
Which can be moved one at a time, and then reassembled."
-- The Tao of Meow

Thanks guys. Seem that I need to change my spectacles as I've really missed
the line.

 

[Check It Out]

Heh, don't let anyone give you a hard time. Most of us have missed stuff and
determined the smoke specs of many parts the hard way.

"Boxster" <richardcai@myrealbox.com> wrote in message
news:c3d5bf$ucj$1@reader01.singnet.com.sg...

Gilbert Mouget <prenom.nom@free.fr.invalid> wrote in message
news:4059bfa3$0$290$626a14ce@news.free.fr...
In article <c3cc8g$apu$1@mawar.singnet.com.sg>,
dated Thu, 18 Mar 2004 22:23:55 -0800,
Boxster, <richardcai@myrealbox.com> says...


Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain
to
source is 200V. I would like to know what is the maximun voltage that
can be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

It is specified in the datasheet :

http://www.semiconductors.philips.com/acrobat/datasheets/IRF640_S_1.pdf

Gate-source maximum voltage 1 20 V
Gate-source operating voltage 0 +10 V

--
"You cannot move mountains if you believe them to be mountains.
You must think of them as collections of small stones,
Which can be moved one at a time, and then reassembled."
-- The Tao of Meow


Thanks guys. Seem that I need to change my spectacles as I've really
missed
the line.

 

[Roger Hamlett]

"Boxster" <richardcai@myrealbox.com> wrote in message
news:c3cc8g$apu$1@mawar.singnet.com.sg...

Hi

I am using a n channel mosfet IRF640. The breakdown voltage for drain to
source is 200V. I would like to know what is the maximun voltage that can
be
applied to the gate. Is it also 200V as it is not specified in the
datasheet.

Thanks!! in advance

Richard
Try another data sheet!....

The Fairchild data sheet (this is available on the web), gives: Vdgr=200V

Best Wishes