Title :
A new approach to reducing output ripple in switched-capacitor-based step-down DC-DC converters
Author :
Han, Jifeng ; von Jouane, A. ; Temes, Gabor C.
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR, USA
Abstract :
Rapidly dropping power supply voltages and tight voltage regulation requirements for integrated circuits challenge power supply designers. A novel interleaved discharging (ID) approach is presented to reduce the output ripple in step-down switched-capacitor (SC) DC-DC converters. Simulation and experimental results of a four-stage SC DC-DC converter show that the TD approach can reduce the output ripple by a factor of three. The proposed ID approach also improves the converter efficiency by 7%. The ID approach is suitable for all step-down SC DC-DC converters and provides flexibility in design optimization.
Keywords :
DC-DC power convertors; discharges (electric); optimisation; switched capacitor networks; switching convertors; voltage control; design optimization; four-stage SC DC-DC converter; integrated circuit; interleaved discharging approach; output ripple reduction; power supply voltage; step-down switched-capacitor; voltage regulation; Application software; Capacitors; Computer science; Costs; DC-DC power converters; Interleaved codes; Power supplies; Switching circuits; Switching converters; Voltage;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348552
