Patent ID: 8400745

Claim:
A fuse apparatus, comprising: a current sensor, said current sensor measuring current within a device; a controller, said controller includes a voltage differentiator, an OR gate and a flip-flop, an output of said OR gate being coupled to a reset of said flip-flop, the voltage differentiator coupled to an input voltage of said device and provides a set pulse to a set input of said flip-flop, an output of said current sensor is coupled to a first input of said OR gate of said controller; a switch, said switch being coupled to said controller; and a voltage sensor, said voltage sensor measuring voltage at an output of said device, an output of said voltage sensor being coupled to a second input of said OR gate of said controller, wherein said current sensor is coupled to conversion circuitry via the switch, the switch being external to the conversion circuitry and being directly controlled by an output of the flip-flop, and wherein said controller causes said switch to interrupt current within said device through an open circuit between terminals of said switch to protect the conversion circuitry and a load coupled to an output of the conversion circuitry when at least one of said current sensor measures current that exceeds a threshold current or said voltage sensor measures voltage that exceeds a threshold voltage.