Re: MOSFET GOT XTREMELY HOT



D from BC wrote:

bigcaboy@xxxxxxxxx wrote:

I just used the IRFP044 as picture shows but it gets extremely hot at
8A DC. It buzzed and I saw a sine wave stacked DC at Gate. Is't
caused by the linear region resistance?

got a picture from other website:

http://www.unsp.com.cn/app/pic/2006526115419.jpg

or any other reasons?

I see unstable has already been mentioned.

Even in stable operation it's still a bit of heat.
The IRF640 will waste 9.6W @8A. Hopefully heat sinked ok.

Yes absolutely. The device needs at minimum to be heatsinked adequately to
cope with the DC losses.

Graham

.

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