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04.08.2007, 03:07 PM
I've never seen a fuse anywhere; the regulator ICs usually use some type of current-limiting circuit. But, if the input voltage is too high and/or current draw is too much too fast, it could malfunction I guess. Maybe it was a thermal issue. Some of it depends on the regulator used. Is it an IC rated for 3A, or a cheaper/smaller/easier obtained regulator with a simple pass transistor? Without taking it apart it is hard to tell exactly what happened and why.
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