APPARATUS FOR SUPPLYING POWER OF RESONANCE USING STATIC FREQUENCE CONVERTER

摘要

PURPOSE: A resonant power supply device is provided to improve the reliability of a product by forming a soft start part, a frequency setting part, a current sensing part, and an auxiliary power supply part in the vicinity of a main switching IC part. CONSTITUTION: A soft start part(110) controls an initial voltage which is applied to a power supply device(100). A first frequency setting part(120) is set to a first switching frequency when a resonant power supply device is switched on and off. A second frequency setting part(130) is set to a second switching frequency when the resonant power supply device is switched on and off. A current sensing part(150) senses a current which is applied to the first side of the resonant power supply device. An auxiliary power supply part(170) supplies an operation voltage to a main switching IC part(160).