Modelling of maximum power efficiency of charge pump circuits | Zendy

Wong OiYing | Zendy; Wong Hei | Zendy; Tam WingShan | Zendy; Kok ChiWah | Zendy

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Modelling 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) - electronic circuit , power (physics) , charge pump , electrical engineering , electronic engineering , charge (physics) , materials science , optoelectronics , voltage , engineering , physics , capacitor , quantum mechanics

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.

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