A High-Efficiency CMOS DC-DC Converter With 9-$\ \mu$s Transient Recovery Time

Liu, Pang-Jung; Ye, Wei-Shan; Tai, Jia-Nan; Chen, Hsin-Shu; Chen, Jau-Horng; Chen, Y. E.

doi:10.1109/tcsi.2011.2167259

Cited by 36 publications

(19 citation statements)

References 25 publications

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“…Table I shows the perform- ance comparison with prior designs. It can be seen that the proposed work achieves a higher efficiency than work proposed in [3,6,9] with 1.8 V output. Although the efficiency of this work is lower than the products proposed in [11,12], the output ripple of the proposed BUCK, which is more important in mobile phone application, is much smaller than those of products proposed in [11,12].…”

Section: Simulation and Measurement Resultsmentioning

confidence: 79%

“…However, the quiescent current in PFM mode is still relatively high because the operational amplifier loop which is used to control the system consumes considerable power. The best efficiency of reference designs [3,6,9] in PFM is lower than 80%. Thus, the demand of high efficiency could not be met if the load is extremely low (lower than 5 mA, for example).…”

Section: Introductionmentioning

confidence: 96%

“…If PWM control is still used in this situation, the efficiency will drop dramatically. In order to improve light load efficiency, by optimizing the driver control of power output device, some of designs reduce the switching losses [3,4]. Some researches use digital control to optimize light load efficiency, such as the sigma-delta modulation proposed in [5].…”

Section: Introductionmentioning

confidence: 99%

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A tri-mode high light-load efficiency BUCK converter for mobile phone application

Qing

Lin

2016

IEICE Electron. Express

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This paper proposes a wide output range and tri-mode BUCK circuit which utilizes PWM mode, PFM mode and PSM mode at heavy, light and very light loads respectively. By shutting down the majority of the internal modules, employing minimum loop control and reducing the quiescent current, the design could lower the static power consumption. The work, therefore, could increase efficiency at very light load. The proposed BUCK is fabricated using SMIC 0.18 µm process. Test results show that when the input is 4 V and the output is 1.8 V, the efficiency of the proposed BUCK is 90% and 85% at 300 mA and 5 mA load current respectively.

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Section: Simulation and Measurement Resultsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A tri-mode high light-load efficiency BUCK converter for mobile phone application

Qing

Lin

2016

IEICE Electron. Express

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“…Regrettably, switching DC/DC converters with a pulse-width modulation (PWM), which involves a fixed switching frequency, have a low efficiency (say, lower than 60 % [1]) at light loads mainly due to switching losses. To cope with this limitation, the efficiency of PWM converters can be improved by dynamically adjusting: (i) the gate driving voltage [2,3], (ii) the size of the switching transistors [4,5], and (iii) the number of active phases (i.e. phase shedding) in multiphase DC/DC converters [6].…”

Section: Introductionmentioning

confidence: 99%

Optimal Inductor Current in Boost DC/DC Converters Operating in Burst Mode Under Light-Load Conditions

Reverter

Gasulla

2016

IEEE Trans. Power Electron.

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Abstract-This letter analyses how the efficiency of boost DC/DC converters operating in burst mode under light-load conditions can be improved by an appropriate selection of the inductor current that transfers energy from the input to the output. A theoretical analysis evaluates the main power losses (fixed, conduction and switching losses) involved in such converters and how do they depend on the inductor current. This analysis shows that there is an optimal value of this current that causes minimum losses and, hence, maximum efficiency. These theoretical predictions are then compared with experimental data resulting from a commercial boost DC/DC converter (TPS61252) whose average inductor current is adjustable. Experimental results show that the use of the optimal inductor current, which was around 340 mA for an output voltage of 5 V, provides an efficiency increase of 7%.

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“…Design of multi-level system controller is complex and high-end hardware is required to generate multiple switching pulses [10][11]. Necessary high frequency switching signals of these systems are generated by CMOS implementation of controller [12][13]. Very Large Scale Integrated (VLSI) circuit technology provides optimum solution to the design issues of modular integrated / multi-level converters.…”

Section: Introductionmentioning

confidence: 99%

Efficient Energy Management System for Solar Energy

Kamala

Santhosh

2015

Automatika

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Original scientific paperSolar power is the major renewable energy source opted by developing countries as stand-alone / Grid enabled system. Industries and educational institutions are opting for solar energy to combat power crisis. This paper proposes knowledge based, self configurable, smart controller to efficiently use solar energy according to load, under frequent grid failure environment. It is enabled with fault identification and isolation. Extension to higher power capacity is easily achieved with plug and play mechanism. Proposed control architecture is implemented using Field Programmable Gate Array (FPGA), that supports modular level implementation with well defined interfaces for each sub-system. It can be used with low power as well as high power photo-voltaic system. Efficiency of the proposed architecture is demonstrated for the photo-voltaic system installed in educational institution.Key words: Field Programmable Gate Array, Photo-voltaic system, Pulse width modulation, Stand alone system. Sustav za efikasno upravljanje solarnom energijom. Solarna energija spada među glavne obnovljive izvore energije odabrana od strane zemalja u razvoju kao samostalnih izvora ili umrežene s ostalim izvorima. Industrija i edukacijske institucije predlažu solarnu energiju u borbi protiv energetske krize. U ovome radu predstavljen je samokonfigurabilan regulator za efikasno korištenje solarne energije s obzirom na opterećenje ičeste promjene u mreži. To je omogućeno uz identifikaciju kvara. Ekstenzija na visoke snage jednostavno se postiže sa uređajem koji se može odmah koristiti. Regulator je implementiran koristeći programirljive logičke sklopove (FPGA) koji podržavaju modularnu implementaciju svake razine sa sučeljem prema svakom podsustavu. Predloženi sustav može biti korišten za niske snage kao i za visoke snage kod fotonaponskih sustava. Efikasnost predložene arhitekture testirana je na fotonaponskom sustavu postavljenom na edukacijskoj instituciji.Ključne riječi: programirljivi logički sklopovi, fotonaponski sustav, pulsno-širinska modulacija, samostalni sustav

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A High-Efficiency CMOS DC-DC Converter With 9-$\ \mu$s Transient Recovery Time

Cited by 36 publications

References 25 publications

A tri-mode high light-load efficiency BUCK converter for mobile phone application

A tri-mode high light-load efficiency BUCK converter for mobile phone application

Optimal Inductor Current in Boost DC/DC Converters Operating in Burst Mode Under Light-Load Conditions

Efficient Energy Management System for Solar Energy

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