DC-DC CONVERTER FOR REDUCING SWITCHING LOSS, WIRELESS POWER RECEIVING APPARATUS INCLUDING THE DC-DC CONVERTER

摘要

PURPOSE: A DC-DC voltage converter which reduces switching loss and a wireless power receiving device including the same are provided to detect a current amount of the DC-DC voltage converter without sensing the current amount. CONSTITUTION: A current detector(250) comprises a charge pump(310), a capacitor(320), a comparator(330), and a frequency change controller(340). The charge pump outputs charges during a turn-on time period of a turn-on switch. The capacitor stores the outputted charges from the charge pump during the turn-on time period. The comparator transmits a comparison result to the frequency change controller by comparing current amount measurement voltage outputted from the capacitor and reference voltage for current amount measurement.