The switch is PNP type. When the control pulse is low power level, the switch is on and the inductor stores energy. The switch changes the input voltage of the circuit into high frequency pulse. When the control pulse is high power level, the switch is cut off and the inductor releases the stored energy to the load. In order to ensure that the inductive current can be continuous in the switching process, Schottky diode is selected as the continuous current diode. This diode has a fast on-off recovery time. When the switch on turns to off, it can be quickly converted from off to on, so as to ensure that the inductive current is continuous. In order to reduce the ripple voltage, the filter capacitor at the output end uses the high-quality capacitor with low series equivalent resistance. In addition, the low equivalent series resistance can be obtained by paralleling two capacitors, assuming that the output filter capacitor is 470 μ F,<br>
正在翻译中..