Pulse Skipping Switching mode: a case study of Efficiency Improvement on a switched-capacitor DC-DC step-up converter IC

Saiz-Vela, A.; Miribel-Català, Pere Ll.; Colomer, Jordi Magnet; Puig-Vidal, M.; Samitier, J.

doi:10.1109/isie.2006.295804

Cited by 8 publications

(5 citation statements)

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“…Extra circuitry like non-overlapping clock generators [21] and level-shifters that are needed to implement the CK k switching clock signals shown in Fig. 1 must also be included in the simulation phase leading to large and slow simulations (a couple of hours using a dedicated workstation with four 1 GHz UltraSPARC III processors with 8,192 Mbytes of RAM memory and Spectre simulator from Cadence Ò in liberal mode) to obtain just some milliseconds of the steady-state V out waveform for a fixed configuration of the design parameters. Moreover, if a parametric analysis (just for one parameter) is carried out to observe the charge pump's behavior, then the time needed to obtain just some milliseconds of the steady-state V out waveform increases up to a couple of full days.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…This kind of switching mode can be easily implemented using the pulse skipping frequency regulator (PSFR) circuit shown in Fig. 15 which reduces the switching frequency f s skipping unneeded switching clock pulses while at the same time regulates the steady-state V out voltage [8,27].…”

Section: Pulse Skipping Switching Modementioning

confidence: 99%

“…The efficiency drawbacks related to the charge pump approach have been minimized using the well-known pulse skipping switching technique [8] through the integration of a pulse-skipping frequency regulator circuit (PSFR) in the final charge pump design leading to significant efficiency improvements (specially for lighter loads [9]) while at the same time getting a regulated output voltage.…”

Section: Introductionmentioning

confidence: 99%

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Charge pump design for high-voltage biasing applications in piezoelectric-based miniaturized robots

Saiz-Vela

Miribel-Català

Colomer

et al. 2008

Analog Integr Circ Sig Process

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Fully autonomous piezoelectric-based miniaturized robots usually have a high-voltage biasing system that provides the required voltage levels to drive properly their piezoelectric actuators. In this paper a novel on-board biasing system based on the cascade connection of three full-custom charge pump ICs is presented. Simulated and experimental results show that the proposed biasing system is capable to obtain a regulated output voltage up to 20 V from a 3.3 V battery and deliver successfully up to 120 mW of power. Moreover, a novel approach in the steady-state analysis of the two-phase voltage doubler (which is the core of the designed charge pump IC) has been developed in order to have a tool capable to provide a full understanding of the steady-state voltage doubler's behavior while at the same time accelerate and simplify the design process of such circuit. Simulated results show that the proposed mathematical model is more accurate than already developed models. The design of the charge pump IC has been implemented using a commercial 0.7 lm Bipolar-CMOS-DMOS (BCD) technology.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Pulse Skipping Switching Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Charge pump design for high-voltage biasing applications in piezoelectric-based miniaturized robots

Saiz-Vela

Miribel-Català

Colomer

et al. 2008

Analog Integr Circ Sig Process

Self Cite

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“…A conventional method to regulate voltage in a switched-capacitor based DC/DC converter is to use pulse-frequency modulation (PFM) [3] or burst mode modulation [4]. These control techniques can improve light load efficiency, but suffering from tones in the frequency spectrum.…”

Section: Introductionmentioning

confidence: 99%

A novel high efficiency low ripple switched-capacitor DC/DC converter

Wang

Changming

Wang

et al. 2012

Analog Integr Circ Sig Process

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This paper presents a new method to improve light load efficiency and minimize output ripple of switched-capacitor (SC) DC/DC converters. In order to improve light load efficiency, this paper proposes adaptive frequency modulation to scale down gate-drive losses as load current reduces. Adaptive duty cycle modulation is proposed to minimize output ripple as the converter works under different gain hopping mode. Furthermore, this work optimized switching frequency, the dead time of 2-phase non-overlapping clocks and switching transistor size for efficiency enhancement. A new compensation circuit is also proposed to make system stable. A transistor level implementation of the proposed SC converter in Chartered 0.35 lm CMOS process is provided. Measurement results shows: maximum ripple voltage is\8 mV and efficiency is up to 87%.

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“…In some applications, an additional regulator is needed to regulate the DC-DC converter and deliver a stable output voltage. There are mainly three different regulation schemes [28][29][30]. i) Pulse-Skip Regulation Figure 2.11 Pulse-skip Regulation In the pulse-skip regulation scheme, the regulation of output voltage is achieved by skipping the unnecessary pulses.…”

Section: Regulation Schemesmentioning

confidence: 99%

Design of a class G audio amplifier

Zhang¹

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I hereby declare that the material contained in my thesis is original work performed by me under the guidance and advice of my supervisor and has not been previously published in whole or in part in any print or electronic format except where due Author's publication is made in the thesis itself. I certify that, to the best of my knowledge, my thesis does not infringe upon anyone's copyright nor violate any proprietary rights. And any ideas, techniques, quotations, or any other material from the work of other people included in my thesis, published or otherwise, are fully acknowledged in accordance with the standard referencing practices. I declare that this is a true copy of my thesis, and this thesis has not been submitted for a higher degree to any other University or Institution.

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Pulse Skipping Switching mode: a case study of Efficiency Improvement on a switched-capacitor DC-DC step-up converter IC

Cited by 8 publications

References 4 publications

Charge pump design for high-voltage biasing applications in piezoelectric-based miniaturized robots

Charge pump design for high-voltage biasing applications in piezoelectric-based miniaturized robots

A novel high efficiency low ripple switched-capacitor DC/DC converter

Design of a class G audio amplifier

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