Thread: Advantages of the Jaguars?
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Unread 22-12-2008, 11:07
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Re: Advantages of the Jaguars?
Quote:
Originally Posted by Al Skierkiewicz View Post
How do we turn off this feature to run the fans constantly? Once hot, a FET wants to be cooled down even if it is not passing current. And I hope this doesn't mean the fans are connected to the output of the H bridge.
The fan is controlled by a separate, smaller, MOSFET; the fan is not controlled by the H-bridge.

The fan turns on whenever there is a non-zero voltage produced at the output. The fan turns off after the following three conditions are met: a) the output goes to 0 V, b) 10 seconds have passed, and c) the internal temperature is below 38C. If the temperature is not below this threshold, the fans stay on after the 10 s period.