Control apparatus and control method for switch-mode power supply

The present invention relates to a high frequency power converter low power factor (低 力 率) driving or output short-circuit control apparatus and control of the power converter capable of preventing damage due to over-current or over-voltage method for generating the like, etc. using a digital control method . The control apparatus of power converter according to the invention, for generating a detection signal corresponding to the digital controller, over-current and over-voltage generator for outputting a gate signal to control an interruption operation of a predetermined switching element in accordance with a control data input detection, and detection It comprises parts of the register keeping a state in which the output of the gate signal upon generation of the signal to be cut off is maintained. Power converter, OCP, OVP, over-voltage, over-current, the control device