Re: MOSFET GOT XTREMELY HOT
- From: D from BC <myrealaddress@xxxxxxxxx>
- Date: Thu, 08 May 2008 18:41:22 -0700
On Thu, 08 May 2008 18:28:06 -0700, D from BC
<myrealaddress@xxxxxxxxx> wrote:
On Thu, 8 May 2008 14:30:27 -0700 (PDT), 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?
Thanks,
Powerboy
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.
D from BC
British Columbia
Canada
Oops.. stuck in smps mode.. :P
9.6W if full on.
This is a linear app.
I'll pick some arbitrary numbers..
Let's say Vds = 12V and Id =8A
That's 96Watts.. Toasty!
D from BC
British Columbia
Canada
.
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