A 480-MHz, multi-phase interleaved buck DC-DC converter with hysteretic control

Schrom, G.; Hazucha, P.; Hahn, Jaehong; Gardner, Donald S.; Bloechel, B.; Dermer, G.; Narendra, S.; Karnik, Tanay; De, Vivek

doi:10.1109/pesc.2004.1354830

Cited by 84 publications

(46 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally the self-oscillating principle from [19], [24] was combined with the interleave principle from [41], [42] in [43], resulting into a significant efficiency improvement. Interleaving two converter legs allows furthermore to use the ripple cancelation as described in [44] and applied in [41].…”

Section: Interleaved Vhf Convertersmentioning

confidence: 99%

Evolution of Very High Frequency Power Supplies

Knott

Andersen

Kamby

et al. 2014

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

Abstract-The ongoing demand for smaller and lighter power supplies is driving the motivation to increase the switching frequencies of power converters. Drastic increases however come along with new challenges, namely the increase of switching losses in all components. The application of power circuits used in radio frequency transmission equipment helps to overcome those. However those circuits were not designed to meet the same requirements as power converters. This paper summarizes the contributions in recent years in application of very high frequency (VHF) technologies in power electronics, shows results of the recent advances and describes the remaining challenges. The presented results include a self-oscillating gate-drive, air core inductor optimizations, an offline LED driver with a power density of 8.9 W/cm 3 and a 120 MHz, 9 W DC powered LED driver with 89 % efficiency as well as a bidirectional VHF converter. The challenges to be solved before VHF converters can be used effectively in industrial products are within those three categories: components, circuit architectures and reliability testing.

show abstract

Section: Interleaved Vhf Convertersmentioning

confidence: 99%

Evolution of Very High Frequency Power Supplies

Knott

Andersen

Kamby

et al. 2014

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

show abstract

“…Recently, a surge of work has been done on integrating voltage regulators onchip [Abedinpour et al 2007;Hazucha et al 2005;Kim et al 2008;Schrom et al 2007;Shrom et al 2004;Wibben and Harjani 2007]. On-chip voltage regulators promise much smaller timing overheads than off-chip regulators: scaling the supply voltage now takes on the order of tens of nanoseconds (or multiple tens or hundreds of processor cycles).…”

Section: Supply Voltage Regulatorsmentioning

confidence: 99%

Fine-grained DVFS using on-chip regulators

Eyerman

Eeckhout

2011

ACM Trans. Archit. Code Optim.

101

View full text Add to dashboard Cite

Limit studies on Dynamic Voltage and Frequency Scaling (DVFS) provide apparently contradictory conclusions. On the one end, early limit studies report that DVFS is effective at large timescales (on the order of million(s) of cycles) with large scaling overheads (on the order of tens of microseconds), and they conclude that there is no need for small overhead DVFS at small timescales. Recent work on the other hand -motivated by the surge of on-chip voltage regulator research -explores the potential of fine-grained DVFS and reports substantial energy savings at timescales of hundreds of cycles (while assuming no scaling overhead).This paper unifies these apparently contradictory conclusions through a DVFS limit study that simultaneously explores timescale and scaling speed. We find that coarse-grained DVFS is unaffected by timescale and scaling speed, however, fine-grained DVFS may lead to substantial energy savings for memory-intensive workloads. Inspired by these insights, we subsequently propose a fine-grained microarchitecture-driven DVFS mechanism that scales down voltage and frequency upon individual off-chip memory accesses using on-chip regulators. Fine-grained DVFS reduces energy consumption by 12% on average and up to 23% over a collection of memory-intensive workloads for an aggressively clock-gated processor, while incurring an average 0.08% performance degradation (and at most 0.14%). We also demonstrate that the proposed fine-grained DVFS mechanism is orthogonal to existing coarse-grained DVFS policies, and further reduces energy by 6% on average and up to 11% for memory-intensive applications with limited performance impact (at most 0.7%).

show abstract

“…The use of constant-frequency pulse-width modulation is widespread in switching power converters, although a sigma-delta scheme for modulation [11][12][13][14][15] and varying switching frequency schemes, such as sliding-mode and hysteretic control [16][17][18][19][20][21][22][23][24][25][26], for control can also be used. The pulse width modulation (PWM) principle is widely used in power electronics applications for controlling power converters (DC-DC, DC-AC, etc.)…”

Section: Introductionmentioning

confidence: 99%

ASIC and FPGA based DPWM architectures for single-phase and single-output DC-DC converter: a review

Chander¹,

Agarwal

Gupta

2013

Open Engineering

View full text Add to dashboard Cite

Pulse width modulation (PWM) has been widely used in power converter control. This paper presents a review of architectures of the Digital Pulse Width Modulators (DPWM) targeting digital control of switching DC-DC converters. An attempt is made to review the reported architectures with emphasis on the ASIC and FPGA implementations in single phase and single-output DC-DC converters. Recent architectures using FPGA's advanced resources for achieving the resolution higher than classical methods have also been discussed. The merits and demerits of different architectures, and their relative comparative performance, are also presented. The Authors intention is to uncover the groundwork and the related references through this review for the benefit of readers and researchers targeting different DPWM architectures for the DC-DC converters.

show abstract

A 480-MHz, multi-phase interleaved buck DC-DC converter with hysteretic control

Cited by 84 publications

References 7 publications

Evolution of Very High Frequency Power Supplies

Evolution of Very High Frequency Power Supplies

Fine-grained DVFS using on-chip regulators

ASIC and FPGA based DPWM architectures for single-phase and single-output DC-DC converter: a review

Contact Info

Product

Resources

About