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Novel PWM control method of switched capacitor DC-DC converter

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1 Author(s)
Suetsugu, T. ; Dept. of Electron., Fukuoka Univ., Japan

Switched capacitor converter becomes important as an inductor-less power supply circuit. The big input current ripples and small control width are the problems of switched capacitor converter. PWM method of switched capacitor converter has been introduced already, but the control width was not large. In conventional methods the output voltage is adjusted by the ratio of discharging and charging time value of the condenser. In this proposed method, the output voltage is controlled by regulating overall length of the dead time. The simulation result shows that the control width of output voltage increased by about 1.6 times compared with the conventional method. Furthermore, the ripple of input current also decreased

Published in:

Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on  (Volume:6 )

Date of Conference:

31 May-3 Jun 1998

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