Switched-mode power supply for charging a capacitance during a first period, forming a resonant circuit with an inductance, and discharging the capacitance into a load during a second period disjunct from the first period

摘要

A switched-mode power supply specially suitable for supplying a low output power. The switched-mode power supply periodically first charges a capacitor (C) from an input voltage (Vin) during a first period of time (T1), and then forms a resonant circuit, including the capacitor (C) and an inductor (L), to transfer the charge in the capacitor (C) to a load (Z) via a rectifier during a second period of time (T2).