| 摘要 |
A current-limiting circuit that includes a transistor connected between an input terminal and an output terminal of the current-limiting circuit. A controller is arranged to monitor a current flowing through the transistor and to control the transistor based on the monitored current so as to limit the current, wherein a voltage dropped across the transistor varies over a range of values during operation in a current-limiting mode. The controller includes a timing module arranged to control, based on a value of the voltage across the transistor, a period of time for which the transistor limits the current. For all ranges of voltage that may be dropped across the transistor during the current-limiting mode, the timing module is arranged to control the respective period of time for each range, such that the transistor dissipates substantially the maximum amount of energy that it is capable of dissipating without sustaining damage. |
