Application Principle:

The阻容降压circuit is favored for its simple design, compact size, and extremely low cost. It is commonly used in small current power drivers for LED sources, meters, and smart controls. The circuit utilizes the capacitive reactance to limit current, thereby achieving voltage reduction. The current calculation formula is 2 * 3.14 * f * C * U. Such designs are generally suitable only for low-power and low-current loads (recommended <200mA).When designing a voltage reduction circuit, it is crucial to note that while electronic devices can still operate if the capacity of a standard filter capacitor diminishes, the situation is different for the capacitive voltage reduction circuit. If there is capacity reduction or bursting, it can lead to a decrease in supply current, causing equipment failure. Therefore, the lifespan of capacitive voltage reduction capacitors is highly critical, especially for continuous-use models. Currently, many manufacturers using this capacitor voltage reduction design are experiencing batch failures, so it is essential to be cautious when selecting capacitors.