Purpose: Fluorescent lamp, electronics ballast, electronic transformer, switch mode power supply.

用途: 用于节能灯 、 电子镇流器 、 电子变压器, 开关电源.

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Traditional switch - mode power supply, however , has the problem of large harmonic current and low power factor.

传统的开关电源存在着输入电流谐波大、功率因数低等问题.

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