| 摘要 |
A MOSFET has its gate voltage controlled to provide a constant drain current of the MOSFET, for example to limit inrush current for charging a capacitance of a power supply arrangement. A decrease in the gate voltage supplied to the MOSFET, corresponding to an increase in the junction temperature of the MOSFET, by more than a determined amount is detected and used to reduce the gate voltage, and hence the drain current, for example to zero, to prevent heating of the MOSFET beyond a maximum operating temperature.
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