Patent ID: 9653993
Date: 2017-05-16
CPC Classifications: G05F,H02M

Claim:
1. A switching apparatus comprising: a switch for controlling a current flowing through an inductive element; a monitoring node connected with the switch; and a signal control circuit, connected with the monitoring node, for turning on/off the switch, wherein the signal control circuit comprises: an integrator for generating a comparison voltage by integrating a difference between a monitoring voltage of the monitoring node and a first reference voltage; and a comparator for generating a reset signal by comparing the comparison voltage with a second reference voltage, wherein the signal control circuit turns off the switch by using the reset signal, and the integrator comprises: a resistor unit; a capacitor unit; and a calibrator for adjusting at least one of a resistance of the resistor unit and a capacitance of the capacitor unit and allowing a peak value of the comparison voltage to fall within a target range, and wherein the comparator compares the comparison voltage with the second reference voltage and generates a reset signal when the comparison voltage becomes substantially equal to the second reference voltage.