High efficiency two-phase switched-capacitor converter with seven distinct negative voltage ratios for power saving applications

Vivekanandan Subburaj; Debashisha Jena; Parthiban Perumal; Yaqub Mahnashi

doi:10.1080/21681724.2019.1600728

High efficiency two-phase switched-capacitor converter with seven distinct negative voltage ratios for power saving applications

Vivekanandan Subburaj^*, Debashisha Jena, Parthiban Perumal, Yaqub Mahnashi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

In this letter, a reconfigured switched-capacitor converter (SCC) is proposed that is capable of achieving seven negative voltage conversion ratios (VCRs) using only three flying capacitors and minimum number of switches. The proposed converter is used to drive a white-LED backlight (WLB) in cellular phones for various backlight conditions. The negative VCR is realized with a single-input single-output structure using 10 CMOS switches and three flying capacitors. The reconfigured SCC has an advantage of choosing buck/boost voltages to drive the WLBs for various black light conditions. The proposed converter is tested experimentally with a low input voltage of 10 mV to 0.5 mV, and it maintains a high efficiency of 85%-95% with an output voltage that varies from −1 mV to −0.1 V.

Original language	English
Pages (from-to)	298-303
Number of pages	6
Journal	International Journal of Electronics Letters
Volume	8
Issue number	3
DOIs	https://doi.org/10.1080/21681724.2019.1600728
State	Published - 2 Jul 2020

Bibliographical note

Publisher Copyright:
© 2019 Informa UK Limited, trading as Taylor & Francis Group.

Keywords

DC-DC switched-capacitor converters
Negative Switched-capacitor Converter (NSCC)
charge pump white-LED backlight applications
inductorless converters

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Computer Networks and Communications
Electrical and Electronic Engineering

Access to Document

10.1080/21681724.2019.1600728

Cite this

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title = "High efficiency two-phase switched-capacitor converter with seven distinct negative voltage ratios for power saving applications",

abstract = "In this letter, a reconfigured switched-capacitor converter (SCC) is proposed that is capable of achieving seven negative voltage conversion ratios (VCRs) using only three flying capacitors and minimum number of switches. The proposed converter is used to drive a white-LED backlight (WLB) in cellular phones for various backlight conditions. The negative VCR is realized with a single-input single-output structure using 10 CMOS switches and three flying capacitors. The reconfigured SCC has an advantage of choosing buck/boost voltages to drive the WLBs for various black light conditions. The proposed converter is tested experimentally with a low input voltage of 10 mV to 0.5 mV, and it maintains a high efficiency of 85%-95% with an output voltage that varies from −1 mV to −0.1 V.",

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author = "Vivekanandan Subburaj and Debashisha Jena and Parthiban Perumal and Yaqub Mahnashi",

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AU - Subburaj, Vivekanandan

AU - Jena, Debashisha

AU - Perumal, Parthiban

AU - Mahnashi, Yaqub

PY - 2020/7/2

Y1 - 2020/7/2

N2 - In this letter, a reconfigured switched-capacitor converter (SCC) is proposed that is capable of achieving seven negative voltage conversion ratios (VCRs) using only three flying capacitors and minimum number of switches. The proposed converter is used to drive a white-LED backlight (WLB) in cellular phones for various backlight conditions. The negative VCR is realized with a single-input single-output structure using 10 CMOS switches and three flying capacitors. The reconfigured SCC has an advantage of choosing buck/boost voltages to drive the WLBs for various black light conditions. The proposed converter is tested experimentally with a low input voltage of 10 mV to 0.5 mV, and it maintains a high efficiency of 85%-95% with an output voltage that varies from −1 mV to −0.1 V.

AB - In this letter, a reconfigured switched-capacitor converter (SCC) is proposed that is capable of achieving seven negative voltage conversion ratios (VCRs) using only three flying capacitors and minimum number of switches. The proposed converter is used to drive a white-LED backlight (WLB) in cellular phones for various backlight conditions. The negative VCR is realized with a single-input single-output structure using 10 CMOS switches and three flying capacitors. The reconfigured SCC has an advantage of choosing buck/boost voltages to drive the WLBs for various black light conditions. The proposed converter is tested experimentally with a low input voltage of 10 mV to 0.5 mV, and it maintains a high efficiency of 85%-95% with an output voltage that varies from −1 mV to −0.1 V.

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High efficiency two-phase switched-capacitor converter with seven distinct negative voltage ratios for power saving applications

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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