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2.PFC(功率因素校正)电路厦华37HU电源板中PFC电路如图3所示。由驱动控制电路N501,开关管V501,储能电感L504,充电电路D502、C514组成有源PFC电路。通过电感来校正电流的相位,使电流与电压相位一致从而提高功率因数,并防止电路产生的多次谐波对电网的干扰,提高电源的有效利用率。(1)NCPl653A简介N501(NCPl653A)是经济型PFC控制器。其引脚功能和在厦华液晶彩电37HU电源板应用时的对地电压
2.PFC (Power Factor Correction) circuit Polaris 37HU power board PFC circuit shown in Figure 3. By the drive control circuit N501, switch V501, storage inductor L504, charging circuits D502, C514 form the active PFC circuit. By inductors to correct the current phase, the current and voltage phase to improve the power factor, and to prevent multiple harmonics generated by the circuit on the grid interference and improve the effective utilization of power. (1) NCPl653A Introduction N501 (NCPl653A) is an economical PFC controller. The pin function and the Xoceco LCD color TV 37HU power supply board when applied to the ground voltage