Patent ID: 9225168
Filing Date: 2015-12-29
Classification: H02J,H02M

Abstract:
1. A control circuit of a switching power supply device, the switching power supply device generating a square wave voltage from an input voltage by switching a High-side switch and a Low-side switch and generating a direct-current output voltage by smoothing the square wave voltage by a lowpass filter comprising an inductor and a capacitor, the control circuit comprising: a first current source capable of supplying an auxiliary current to a load resistance of the switching power supply device when a load current flowing through the load resistance increases; a second current source capable of pulling in a current from the load resistance when the load current flowing through the load resistance decreases; and an auxiliary current controller configured to activate the first current source or the second current source from when a variation in the load current flowing through the load resistance is detected to have exceeded a predetermined level until a current flowing through the inductor becomes equal to the load current flowing through the load resistance.