Patent ID: 8625317
Filing Date: 2014-01-07
Classification: H02M,Y02B

Abstract:
1. An isolated switch-mode power supply device capable of controlling switching of a switching element in one of a continuous operation and a burst mode operation, and of controlling conversion of an inputted voltage into a required outputted voltage, the isolated switch-mode power supply device comprising: a control power supply source configured to supply control power required for controlling the switching; a first control unit having a current supplying unit for supplying a preliminarily determined current during at least a part of a time period in which power supply is received from the control power supply source, and configured to control the switching of the switching element in one of the continuous operation and the burst mode operation; a control power supply switch configured to either connect or disconnect the first control unit and the control power supply source; a capacitance element unit having a first capacitor to which the current is supplied from the current supplying unit, a capacitor charge voltage of the first capacitor changing according to an outputted voltage in the burst mode operation; and a second control unit configured to control the power supply to the first control unit by opening the control power supply switch during at least a part of a switching pause period in the burst mode operation according to the capacitor charge voltage of the first capacitor.