| Abstract |
A new type of DC power supply, containing only switches and capacitors, but no inductors or transformers, is presented. All the elements of the converter, but the capacitors, can be implemented in Integrated-Circuit (lC) technlology. Thus, the proposed power supply is characterized by low weight, small size and high power density. An original switching sequence is designed by dividing each switching cycle into eight stages. Four of the stages are for regulation purpose only. As a result, the new DC-DC regulator provides constant output voltage despite large variation in input voltage or load. The capacitors are grouped in two subcircuits; in each half-cycle, one of the subcircuits operates in the charging mode (from the input Voltage) and the other one in the discharging mode (on the load); their role is interchanged in the subsequent halfcycle. An optimum design of the values of the switching period and of capacitors assures a small ripple in the output voltage. |
