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P‐45: A Multi‐Phase, High‐Current‐Drivability Charge Pump in Display Driver ICs
Author(s) -
Lin Hesheng,
Ding Dedong,
Liu Binjie,
Zhang Dewei,
Wen Jinyuan,
Zhang Min
Publication year - 2018
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.12168
Subject(s) - capacitor , charge pump , topology (electrical circuits) , voltage , chip , electrical engineering , power (physics) , phase (matter) , electronic circuit , integrated circuit , electronic engineering , current (fluid) , process (computing) , inductor , engineering , computer science , physics , quantum mechanics , operating system
In this work, a multi‐phase charge pump topology is proposed to drive the display driver integrated circuits. To achieve high integration and power efficiency simultaneously, a converter with full‐coverage voltage conversion ratios ranging from 1 to 2 n is realized while the count of off‐chip capacitors is halved. At the same time, the charging period for each clock phase is designed to be equal and it allows a higher operation frequency of 2 n /(n+1) times while the capacitor can still be fully charged. Based on 0.25 µm process, a three‐stage topology has been performed. It has improved the current drivability by 40%–150%. This design is quite suitable for display panels with higher resolution requirements.