The XC9404 series are LED lighting offline controllers that use PFM(Pulse Frequency Modulation) control and have a Power Factor improvement function. The operating input voltage range is 85VAC to 270VAC, and the current is controlled on the primary side without using a Opto-coupler or secondary side control circuit. Because LED current fluctuations caused by input voltage fluctuations and LED voltage fluctuations can be suppressed, a stable LED lighting power supply is obtained.

XC9404系列是LED照明离线控制器，使用PFM（脉冲频率调制）控制，具有功率因数改善功能。工作输入电压范围为85VAC至270VAC，电流在一次侧控制，无需使用光耦或二次侧控制电路。由于输入电压波动引起的LED电流波动和LED电压波动可以得到抑制，因此得到了稳定的LED照明电源。