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发明授权
CN108601146B 一种单级高功率因数和低输出纹波Flyback/Sepic LED驱动电路 失效 - 权利终止

一种单级高功率因数和低输出纹波Flyback/Sepic LED驱动电路
摘要：
本发明涉及一种单级高功率因数和低输出纹波Flyback/Sepic LED驱动电路，包括：输入交流电源AC、二极管整流桥BD1、带辅助绕组的Flyback PFC电路以及辅助去纹波Sepic电路。本发明提出的一种单级高功率因数和低输出纹波Flyback/Sepic LED驱动电路，通过构造单级AC‑DC变换器Flyback与辅助变换器Sepic电路组合的LED驱动电路，实现高效、高功率因数、低输出纹波和恒定的电流输出等功能。
摘要（英）：

The invention relates to a single-stage high-power-factor and low-output-ripple Flyback/Sepic LED driving circuit. The single-stage high-power-factor and low-output-ripple Flyback/Sepic LED driving circuit comprises an input alternating-current power supply AC, a diode rectifier bridge BD<1>, a Flyback PFC circuit with an auxiliary winding and an auxiliary ripple removing Sepic circuit. Accordingto the single-stage high-power-factor and low-output-ripple Flyback/Sepic LED driving circuit provided by the invention, due to construction of the LED driving circuit that a single-stage AC-DC converter Flyback and an auxiliary converter Sepic circuit are combined, functions, such as high efficiency, high power factor, low output ripple and constant current output, are realized.

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