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SWITCHING-MODE POWER SUPPLY (SMPS) HAVING OVERVOLTAGE CUTOFF FUNCTION, AND METHOD OF CUTTING OFF OVERVOLTAGE AND IMAGE FORMING APPARATUS USING THE SMPS
SWITCHING-MODE POWER SUPPLY (SMPS) HAVING OVERVOLTAGE CUTOFF FUNCTION, AND METHOD OF CUTTING OFF OVERVOLTAGE AND IMAGE FORMING APPARATUS USING THE SMPS
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机译:具有过电压切断功能的开关模式电源(SMPS),以及使用SMPS切断过电压和图像形成装置的方法
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摘要
A switching-mode power supply (SMPS) for an image forming apparatus which may prevent an overvoltage supplied to the SMPS, and damage to circuits in the SMPS in the image forming apparatus. The SMPS includes a rectifying circuit to rectify an alternating-current (AC) voltage input from an external power supply source into a direct-current (DC) voltage, a transformer to transform the rectified DC voltage input to a primary coil and output the transformed DC voltage to a secondary coil, a main switch that is connected to the primary coil and switches an output of the transformer, a first overvoltage detecting unit to determine whether the rectified DC voltage is an overvoltage by comparing the rectified DC voltage with a first reference voltage, and a switching control unit to control a switching operation of the main switch based on a result of the determination.
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