Open AccessModelling of maximum power efficiency of charge pump circuits
Author(s) -
Wong OiYing,
Wong Hei,
Tam WingShan,
Kok ChiWah
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.0979
Subject(s) - parasitic extraction , capacitance , capacitor , parasitic capacitance , equivalent circuit , charge pump , power (physics) , electrical engineering , parasitic element , electronic engineering , electronic circuit , control theory (sociology) , materials science , voltage , engineering , physics , computer science , electrode , control (management) , quantum mechanics , artificial intelligence
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.