Another example is that when the resonant capacitor specification of the electronic ballast is not selected properly, there will be a phenomenon that the voltage on the capacitor does not reach the breakdown voltage but is damaged due to the flow of a large resonant current. In a circuit containing a capacitor and an inductor, if the capacitor and the inductor are connected in parallel, it may appear in a small period of time: the voltage of the capacitor gradually increases, while the current gradually decreases; at the same time, the current of the inductor gradually increases, The voltage across the inductor gradually decreases.