This study proposes a high-efficiency circuit for LED driving. The circuit combines an AD-DC flyback circuit, a DC-DC Boost LED constant current driving circuit and a battery charging circuit. The result demonstrated that the proposed circuit can successfully drive a white light LED module with high efficiency and low-light decline in a long period of operating time. In addition, the LED module can operate at wide input voltage range (85 ~ 265 VAC) with the circuit. Moreover, the circuit can be used to drive other types of LED light module. The advantage of this proposed circuit is that it can drive LED with high-efficiency performance and suitable for multi-propose using.
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