LED驅動器的突波電流是指 LED驅動器啟動或通電時短時間內產生的大電流損耗. LED 驅動器中的突波電流通常是由電容器充電和磁性元件磁化引起的。
When an LED driver is started, capacitors need to absorb a large amount of current from the power source to charge up and provide the required power to drive LED lights. At the same time, magnetization of magnetic components such as inductors and transformers also requires a large amount of current. These factors cause a temporary increase in the inrush current of the LED driver, which then gradually decreases after the capacitors are charged and the magnetic components are magnetized.
如果LED驅動器的突波電流超出電路設計的容差範圍，則可能會導致電源開關損壞或導致斷路器跳脫。
抑制突波電流的方法有多種，包括：
使用NTC熱敏電阻 – NTC熱敏電阻是一種對溫度敏感的電阻器，當初始突波電流通過時，它會發熱，導致其電阻值下降。當突波電流減小到穩定狀態時，NTC電阻器會冷卻並恢復到其電阻值。因此，透過在設備上並聯一個NTC熱敏電阻，可以限制初始突波電流的大小。
使用電阻器來限制突波電流 – 可在設備或系統的電路中加入限流電阻，限制開機時的突波電流的大小，使其不至於損壞設備或系統。
採用電容濾波 – 在設備上並聯電容器可以平滑電路的初始啟動，並限制突波電流的大小。當突波電流減小到穩定狀態等級時，電容器的充電電流也會降至接近零。
Using a relay for start-up – Connecting a relay in parallel with the device will automatically disconnect it after the initial inrush current passes when the device is started. This can reduce the size of the inrush current, thereby protecting the device or system.
綜上所述，抑制突波電流的方法有很多，應根據特定應用選擇最適合的方法。