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    • 4. 发明授权
    • Power supply device and driving method thereof
    • 电源装置及其驱动方法
    • US08514591B2
    • 2013-08-20
    • US13475730
    • 2012-05-18
    • Min-Woo LeeKyung-Oun JangSung-Won YunDae-Woong Cho
    • Min-Woo LeeKyung-Oun JangSung-Won YunDae-Woong Cho
    • H02M3/335
    • H02M3/33507H02M2001/0025
    • The present invention relates to a power supply device generating an output power by using an AC line voltage generated through rectification of an AC input, and a driving method thereof. The power supply device controls the switching operation of the power switch by using a sensing voltage corresponding to the drain current flowing to the power switch and the feedback voltage corresponding to the output voltage. The power supply device controls the feedback current every switching cycle to generate a threshold voltage, and compares the sensing voltage and the threshold voltage to control the turn-off of the power switch. The feedback current includes the first current to generate the feedback voltage, and the threshold voltage follows a curved line waveform in which the increasing slope is decreased during the switching cycle.
    • 本发明涉及通过使用通过AC输入的整流产生的AC线电压来产生输出功率的电源装置及其驱动方法。 电源装置通过使用对应于流向电源开关的漏极电流的感测电压和对应于输出电压的反馈电压来控制电源开关的开关操作。 电源装置在每个开关周期控制反馈电流以产生阈值电压,并比较感测电压和阈值电压以控制电源开关的关断。 反馈电流包括产生反馈电压的第一电流,并且阈值电压遵循在开关周期期间增加斜率减小的曲线波形。