A protection circuit includes: a temperature measuring unit which compares a voltage corresponding to a temperature at each of a plurality of sense points with a reference voltage, and generates a measurement result based on a result of comparison; a controller which generates a plurality of current control signals, which controls currents of a plurality of channels corresponding to the plurality of sense points, respectively, based on the measurement result from the temperature measuring unit; and a plurality of phase converter which outputs the currents of the plurality of channels based on the plurality of current control signals, wherein the controller generates the plurality of current control signals until the voltage corresponding to the temperature of each of the plurality of sense points is substantially equal to the reference voltage.