In this paper, a novel flicker-free ac/dc LED driver without electrolytic capacitor is presented. The driver comprises a single-stage boost-forward converter and a bidirectional buck-boost converter, which serves to bypass the low frequency ripple. Therefore, electrolytic capacitor is no longer needed. Compared with other electrolytic capacitor-less topologies, the proposed driver has the advantages of almost unity input power factor, less energy storage, less capacitance needed, and constant output current The operation principle, design process, and control strategy are presented. And the feasibility of the proposed converter is verified by a prototype with 30-V, 1.0-A output.
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机译：本文提出了一种没有电解电容器的新型闪烁AC / DC LED驱动器。驱动器包括单级升压转换器和双向降压 - 升压转换器，其用于绕过低频纹波。因此，不再需要电解电容器。与其他电解电容器的拓扑相比，所提出的驱动器具有几乎统一输入功率因数的优点，较少的能量存储，所需的电容较少，并持续输出电流操作原理，设计过程和控制策略。所提出的转换器的可行性由具有30-V，1.0-A输出的原型验证。
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