DocumentCode :
34332
Title :
Modelling of maximum power efficiency of charge pump circuits
Author :
Wong, Oi-Ying ; Wong, Hang ; Tam, Wing-Shan ; Kok, Chi-Wah
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China
Volume :
50
Issue :
17
fYear :
2014
fDate :
Aug. 14 2014
Firstpage :
1233
Lastpage :
1234
Abstract :
The loss estimation in a switched-capacitor DC-DC converter has caused much controversy because of the uncertainty of the contribution of device parasitics to the power efficiency of a converter. Beginning from a simple equivalent circuit model, a closed-form solution to the maximum achievable power efficiency of a converter in which both the effects of parasitic resistance and capacitance are taken into account is presented. It has been observed that the peak power efficiency of a Dickson charge pump depends mainly on the equivalent parasitic capacitance of a given technology and its operation mode, which is governed by the choices of the coupling capacitance, on-resistance of the switch, as well as the operation frequency of the circuit.
Keywords :
DC-DC power convertors; charge pump circuits; equivalent circuits; switched capacitor networks; switching convertors; Dickson charge pump; charge pump circuits; closed-form solution; coupling capacitance; equivalent circuit model; equivalent parasitic capacitance; loss estimation; maximum power efficiency; operation frequency; parasitic resistance; peak power efficiency; switched-capacitor DC-DC converter;
fLanguage :
English
Journal_Title :
Electronics Letters
Publisher :
iet
ISSN :
0013-5194
Type :
jour
DOI :
10.1049/el.2014.0979
Filename :
6880228
Link To Document :
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