Single-Inductor Multioutput-Level Buck Converter for Reducing Voltage-Transition Time and Energy Overheads in Low Power DVS-Enabled Systems

Kapat, Santanu; Kumar, V. Inder

doi:10.1109/tpel.2017.2691469

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…Timing constraints can be added to enforce fixed frequency even through a transient [163]. For a load increase ∆i o , recovery time t s , peak current i pk , and voltage undershoot ∆v 1 can be obtained as [164]…”

Section: B Time Optimal Control In Dc-dc Convertersmentioning

confidence: 99%

“…In dynamic voltage scaling applications, load current and reference voltage change together, following a droop slope, in which the choice of characteristic impedance would conflict while attempting to reduce time and energy overheads. The corresponding parameters for minimum-time recovery can be found in [164]. The perspective is not unique.…”

Section: B Time Optimal Control In Dc-dc Convertersmentioning

confidence: 99%

“…The limitation is linked to disturbance detection time. Capacitor pre-charge can be used to achieve ultra-fast reference transient performance with minimal energy overhead [164].…”

Section: B Time Optimal Control In Dc-dc Convertersmentioning

confidence: 99%

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A Tutorial and Review Discussion of Modulation, Control and Tuning of High-Performance DC-DC Converters Based on Small-Signal and Large-Signal Approaches

Kapat

Krein

2020

IEEE Open J. Power Electron.

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Many commercial controller implementations for dc-dc converters are based on pulse-width modulation (PWM) and small-signal analysis. Increasing switching frequencies, linked in part to wide bandgap devices, provide the opportunity to increase operating bandwidth and enhance performance. Fast processors and digital signal processing offer new computational techniques for power converter control. Conventional control techniques rarely make full use of operating capability. The objectives of this paper are to present an overview and link to literature on conventional modulation and control techniques for hard-switched dc-dc converters, identify performance limits associated with conventional small-signal-based design, discuss geometric control approaches, and compare strategies for control tuning. The discussion shows how current mode controls have alternative state feedback implementations, and describes unusual opportunities for large-signal control tuning. Considerations for minimum response time are described. Comparisons among tuning methods illustrate how geometric controls can achieve order of magnitude dynamic performance increases. The paper is intended as a baseline tutorial reference for future work on power converter control.

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Section: B Time Optimal Control In Dc-dc Convertersmentioning

confidence: 99%

Section: B Time Optimal Control In Dc-dc Convertersmentioning

confidence: 99%

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A Tutorial and Review Discussion of Modulation, Control and Tuning of High-Performance DC-DC Converters Based on Small-Signal and Large-Signal Approaches

Kapat

Krein

2020

IEEE Open J. Power Electron.

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“…Dynamic voltage scaling (DVS) technique is one of the effective energy‐saving solutions to the signal processor of the portable device . Figure shows the example of an embedded voltage scheduler, which assigns different processor voltage levels in accordance with different task instructions to optimize the power consumption.…”

Section: Introductionmentioning

confidence: 99%

Auto‐tuning charge balance control for improving transient response on buck converter

Liu

Chen

Chang-Chien

2020

Circuit Theory & Apps

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Load transient and dynamic voltage scaling (DVS) are commonly seen in the operation of the system processor. These two functions usually encounter large output voltage transient, which is hard to be quickly settled. Charge balance control is one of the prior choices that enables the converter to operate at its optimal charge/discharge slew rate so as to achieve fast transient response.The effectiveness of the optimal performance generally requires precise knowledge of the circuit parameters for charge balance computation. However, parameter drifting due to the manufacturing process may affect the performance, which is hard to implement a power integrated circuit (IC) for wide range applications. Different from the original approaches, this paper proposes an auto-tuning charge balance control (AT-CBC) to optimize load transient response and DVS of the buck converter. The auto-tuning mechanism can save the preknowledge of the output filter and avoid complex calculation in digital control. The function of AT-CBC is validated by a field-programmable gate array (FPGA) controlled buck converter. Experimental result shows that the output voltage can be settled within 3 μs for the 750-mA load step transient. For the 0.3-V DVS transient, the output voltage can be settled within 4 μs. K E Y W O R D Sauto-tuning, charge balance control (CBC), dynamic voltage scaling (DVS), digital control, DC-DC converter

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“…Switched-mode power supplies (SMPSs) are digital-based converters employing semiconductors as switches. [1,2] The switching operations generate square voltage/current waveforms containing significant ripples at the switching frequency. Therefore, bulky low-pass filters (LPFs) are required to reduce ripples.…”

mentioning

confidence: 99%

Mixed Analog–Digital (MAD) Converters for High Power Density DC–DC Conversions

Zhao

Shen

Ying

et al. 2020

IEEE Trans. Power Electron.

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Conventional switched-mode power supplies (SMPSs) have intrinsic instantaneous power pulsation at the switching frequency thus require bulky filters. To improve the power density, this paper proposes a concept named the Mixed Analog-Digital (MAD) which can be applied as DC-DC converters. By inserting an analog voltage component between the load and source, the output voltage naturally has much smaller fluctuation thereby much smaller passive filter is required. Simulations and experiments validate that the proposed MAD concept can be applied as DC-DC converters to significantly increase the power density.

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Single-Inductor Multioutput-Level Buck Converter for Reducing Voltage-Transition Time and Energy Overheads in Low Power DVS-Enabled Systems

Cited by 8 publications

References 34 publications

A Tutorial and Review Discussion of Modulation, Control and Tuning of High-Performance DC-DC Converters Based on Small-Signal and Large-Signal Approaches

A Tutorial and Review Discussion of Modulation, Control and Tuning of High-Performance DC-DC Converters Based on Small-Signal and Large-Signal Approaches

Auto‐tuning charge balance control for improving transient response on buck converter

Mixed Analog–Digital (MAD) Converters for High Power Density DC–DC Conversions

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