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为了提高LED驱动电源的寿命,必须去掉大电解电容。基于PFC(功率因数校正)芯片L6561,设计了一种采用反激式变换器构成的无大电解电容的大功率LED驱动电源,取消了传统电源中的PFC电路,去掉了限制电源寿命的大电解电容,大大简化了电路,在提高工作效率及可靠性的同时,降低了生产成本。测试结果表明,系统在输入电压变化时,可实现恒流恒压输出。
In order to improve the life of LED drive power, you must remove the large electrolytic capacitor. Based on the PFC (Power Factor Correction) chip L6561, a high power LED driving power supply with large electrolytic capacitor without flyback converter is designed. The PFC circuit in traditional power supply is eliminated, and the large electrolytic Capacitors, greatly simplifying the circuit, while improving work efficiency and reliability, while reducing production costs. The test results show that the system can achieve constant current and constant voltage output when the input voltage changes.