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question on MOSFET

 
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clcheung



Joined: 14 Apr 2008
Posts: 27
PostPosted: Mon Apr 14, 2008 8:10 am    Post subject: question on MOSFET Reply with quote
Hi,

I have tried to use openservo on MG995. At this stage I just use IRF9450 and IRF540 to test it out instead of the IRF7307 or IRF7309. My knowledge on MOSFET is quite limited.

So far I am able to get it up and running well. However, I find that the temperature of the MOSFET goes up quickly to 100 degree C, even those the motor loading is not that high. I am wondering if it is a wrong pick of MOSFET or it is a normal behavior ? If using the small footprint IRF730x, will the temperature be lowered ?

It seems the temperature rising is caused by the PWM switching, i.e., even my motor do not move much, but whenever the PWM output is not zero, the MOSFET start to burn.

Many thanks.
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clcheung



Joined: 14 Apr 2008
Posts: 27
PostPosted: Mon Apr 14, 2008 9:25 am    Post subject: Reply with quote
Sorry to post in wrong sub-forum. Reposted in Hardware section.
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