Power-Sensing Circuit Breaker Breaks New Ground
Most circuit breakers sense current. Fuses, for example, protect a circuit by blocking the current when it exceeds a limit. While current-sensing circuit breakers work well for constant DC or RMS supply voltages, power sensing is safer for a variable supply voltage such as the battery in a notebook computer. This article shows the method and benefits of using a power-sensing approach rather than a current-sensing approach to implement a circuit breaker.
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