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• W1966594760 abstract "This paper introduces a hardware-efficient digital controller integrated circuit (IC) for single- and two-phase dc-dc converters that recovers from load transients with virtually minimum possible output voltage deviation. In steady state, the IC behaves as a conventional voltage-mode pulsewidth modulation controller. During load changes, it enters transient suppression mode that utilizes a simple algorithm, requiring no knowledge of the converter parameters and virtually no processing power, to seamlessly recover back to the steady state without exposing components to a high-current stress. To further minimize the area and power consumption of the IC, an asynchronous track-and-hold analog-to-digital converter (ADC) is developed. The ADC utilizes only one preamplifier and four comparators having approximately ten times smaller silicon area and power consumption than a comparable windowed flash ADC. To compensate effects of converter losses and system delays on the controller operation, the IC also incorporates duty ratio correction logic and dual-extreme point-based detection. The entire IC is implemented in a CMOS 0.18-μm process on a 0.26-mm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> silicon area, which is comparable to the state-of-the-art analog solutions. The functionality of the controller is tested with both single- and two-phase commercial 12-1.8 V, 500-kHz 60/120-W buck converter power stages. The results demonstrate seamless transition to the steady state with virtually minimum output voltage deviation. For the experimental system, this deviation is about four times smaller than that of a fast PID compensator having a one-tenth of the switching frequency bandwidth." @default.
• W1966594760 created "2016-06-24" @default.
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• W1966594760 date "2013-09-01" @default.
• W1966594760 modified "2023-09-27" @default.
• W1966594760 title "Minimum-Deviation Digital Controller IC for DC–DC Switch-Mode Power Supplies" @default.
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• W1966594760 doi "https://doi.org/10.1109/tpel.2012.2227503" @default.
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