Patent ID: 7961444
Filing Date: 2011-06-14
Classification: H02H

Abstract:
1. A high voltage power supply, comprising: a controller to provide pulse width modulation (PWM) signals; first and second input units to respectively receive at least one of the PWM signals from the controller and to output filtered PWM signals; first and second comparison units to respectively output comparison signals according to comparisons of the filtered PWM signals and respective reference signals; first and second switching units to respectively perform switching operations for a power supply to output power according to the comparison signals of the first and second comparison units; first and second transformers to respectively transform the output power according to the switching operations of the first and second switching units; a rectification unit to rectify the output power transformed by the second transformer and to output the rectified output power to the first transformer; and a current overflow prevention unit to detect a change in a load of a device that is operated by the rectified output power supplied from the rectification unit and to ground the filtered PWM signals that are input to the first and second comparison units according to a detection result, wherein the current overflow prevention unit comprises