On-chip inductor DCR self-calibration technique for high frequency integrated multiphase switching converters

Lee, Bumkil; Song, Min Kyu; Brian, D.

doi:10.1109/apec.2017.7931042

Cited by 10 publications

(1 citation statement)

References 5 publications

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“…However, previously reported C FLY voltage balancing techniques cannot support the phase current balancing for multi‐phase converter since the techniques do not have any current information [2, 4]. Although the conventional average inductor‐current sensor is used for the phase current balancing, it cannot mitigate the C FLY voltage imbalance because the sensor averages the current during charging and discharging operations of C FLY [5]. The peak or valley current mode control can be used for both C FLY voltage and phase current balancing [6], but it is difficult to implement the high‐frequency integrated voltage regulator (IVR) due to the speed and accuracy limitation of the current sensor.…”

Section: Introductionmentioning

confidence: 99%

Balancing scheme for phase current and flying‐capacitor voltage in three‐level DC–DC converter

2020

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A balancing scheme for phase current and voltage of the flying capacitor in a fully integrated multi-level multi-phase DC-DC converter is proposed. The proposed balancing scheme based on the ripple voltage of the flying capacitor can simultaneously mitigate the imbalance of phase current and voltage of the flying capacitor. A mathematical analysis shows the proposed scheme can obtain the current information of the flying capacitor during charging and discharging operations and finally obtain the average inductor-current value. A prototype 4-phase 350 MHz three-level DC-DC converter shows <4.7% voltage imbalance of the flying capacitor and <36 mA phase-current imbalance at output voltage and maximum load current of 0.9 V and 1.2 A, respectively.

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Section: Introductionmentioning

confidence: 99%