Analysis of Double Step-Down Two-Phase Buck Converter for VRM

Nishijima, Ken‐ichi; Harada, K.; Nakano, T.; Nabeshima, Takashi; Sato, Terukazu

doi:10.1109/intlec.2005.335149

Cited by 124 publications

(51 citation statements)

References 3 publications

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“…The measured full-load efficiencies are similar to those of the conventional two-phase buck converter built with the same components, which also has been confirmed in [12]. The full load efficiency of the proposed converter could be further improved by optimizing the high side switches.…”

Section: Resultssupporting

confidence: 74%

“…In fact, the extension of the converter in Fig. 1(a) to the three-inductor, three-switch topology is given in [11] and [12]. The approach can be extended to n-inductor implementation as shown in Fig.…”

Section: Concept Generalizationmentioning

confidence: 99%

“…1(a) was presented in [11] and [12], in this paper the analysis and operation of the two-inductor, four-switch buck converter in Fig. 2(a) is given.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Phase Buck Converters with Extended Duty Cycle

Jang

Jovanovic

Panov

Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06.

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A family of multi-phase, pulse-width-modulated (PWM) step-down converters that exhibit high input-to-output voltage conversion ratios is introduced. The proposed converters operate with larger duty cycles and lower voltage stresses on the switches than their conventional converter counterparts making them suitable for applications in high-frequency, non-isolated point-of-load converters employed in powering today's microprocessors.

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Section: Resultssupporting

confidence: 74%

Section: Concept Generalizationmentioning

confidence: 99%

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Multi-Phase Buck Converters with Extended Duty Cycle

Jang

Jovanovic

Panov

Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06.

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“…State-4 is identical to state-2. Charge balance of C t is naturally maintained by this operation allowing both charge and discharge action per cycle [4], this naturally stabilizes V Ct to half the input voltage.…”

Section: Steady-state Operation and Voltage-mode Controllermentioning

confidence: 99%

“…The series capacitor (SC) buck converter, also known as a double step-down two-phase buck converter, originally presented in [4] and recently revised in [5]- [6], merges an interleaved buck converter with a switched-capacitor front-end and by doing so allows high-frequency operation in the MHz range and better system dynamics with reduced stress on the components. Additional attractive features of the SC-buck converter are natural current balancing between phases and effectively doubles the pulse width, which make it suitable for large conversion ratio applications.…”

Section: Introductionmentioning

confidence: 99%

Closed-loop design and time-optimal control for a series-capacitor buck converter

Vekslender

Ezra

Bezdenezhnykh

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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This paper explores the large-signal and smallsignal dynamics of a series-capacitor (SC) buck-type converter and introduces an optimal closed-loop control scheme to accommodate both the steady-state and transient modes. As opposed to a conventional buck converter, where time-optimal control is realized by a single on-off cycle, in the SC-buck topology there is a need to distribute the switching phases to satisfy the charge-balance of the flying capacitor. The new control method hybrids a voltage-mode small-signal controller for steady-state operation and a non-linear, state-plane based transient-mode control scheme for load transients. A detailed principle of operation of the SC-buck converter is provided and explained through an average behavioral model and state-plane analysis. The operation of the controller is experimentally verified on a 12W 12V-to-1.5V converter, demonstrating voltagemode control operation as well as time-optimal response for load transients.

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2016

Power Systems‐On‐Chip

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Analysis of Double Step-Down Two-Phase Buck Converter for VRM

Cited by 124 publications

References 3 publications

Multi-Phase Buck Converters with Extended Duty Cycle

Multi-Phase Buck Converters with Extended Duty Cycle

Closed-loop design and time-optimal control for a series-capacitor buck converter

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