Title :
Development of a switched-capacitor DC/DC boost converter with continuous input current waveform
Author :
Chung, Henry ; Mok, Y.K.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong
fDate :
6/1/1999 12:00:00 AM
Abstract :
A new switched-capacitor (SC)-based dc/dc boost converter is presented. It features good regulation capability and continuous input current, giving lower conducted electromagnetic interference with the supply network than classical SC converters. The converter is realized by using two quasi-switched-capacitor boost converter cells. The dc voltage conversion ratio is controlled by the gate-source voltage of a quasi-switch in each cell, in order to adjust the charging trajectory of the capacitors. By renouncing inductive elements, the converter can be implemented in small size, light weight, high power density, and it is possible to fabricate it in an IC form. A prototype of a 20 W, 6 V/9 V dc/dc boost converter with overall efficiency of 74% and power density of 10 W/in3 has been built. The state-space averaging technique is applied to study the static and dynamic behaviors of the converter
Keywords :
DC-DC power convertors; electromagnetic interference; state-space methods; switched capacitor networks; switched mode power supplies; 20 W; 6 V; 74 percent; 9 V; charging trajectory; conducted electromagnetic interference; continuous input current waveform; dc voltage conversion ratio; dynamic behavior; gate-source voltage; inductive elements; power density; quasi-switched-capacitor boost converter cells; regulation capability; state-space averaging technique; static behavior; switched-capacitor DC/DC boost converter; Capacitors; Electromagnetic interference; Power conversion; Power supplies; Prototypes; Pulse width modulation; Switches; Switching converters; Topology; Voltage control;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
