Abstract: LEDs are widely used in all walks of life due to their good performance. But its core part, the driving power, is the key to ensuring long-term stable and efficient operation of the lighting system. Therefore, solving the defects of electrolytic capacitors in LED driving power and extending the working life of LED driving power is of great significance to the development and popularization of LED lighting systems. This article uses a transformer-isolated Fly-back PFC circuit and a small-capacity CBB capacitor to balance the input power. Combining dual-input and dual-output converters, a three-port converter is constructed, and three power transmission paths are realized through power transmission between three ports. When the input power is greater than the output power, the energy storage capacitor stores excess energy; conversely, the energy storage capacitor releases energy to the load circuit to balance the input power and output power. Among them, the DC / DC converter implements the PFC function, and the energy storage capacitor performs power transmission through charging and discharging, balancing the pulsating power between the input power and the output power to achieve a constant power output, thereby reducing the ripple current and achieving a flicker-free purpose.
Keywords: AC/DC drive power, Fly-back converter, Buck circuit, three-port converter.
Title: Flyback based three-port electroless capacitor LED drive power
Author: Jiaqi Gao, Chunkai Chen, Lianlian Yang, Binbin Du
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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