MOSFET GOT XTREMELY HOT


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?

Thanks,
Powerboy
.

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