A fast hysteretic buck converter with adaptive ripple controller

Wey, Chin‐Long; Li, Ze-Yan; Chang, Kun-Chun; Wey, Dennis K.

doi:10.1109/mwscas.2012.6292230

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…For the purpose of achieving these goals, a hysteretic buck converter is suitable due to inherent characteristics of fast transient response, unconditionally stable operation, and simple composition [8][9][10][11][12][13][14]. However, the switching frequency of the conventional hysteretic buck converter can become too low due to small parasitic R ESR , which may result in non-negligible acoustic noise interference [9,13]. It is also very sensitive to variations on V DD and V OUT , resulting in a wide range of noise spectrum [8].…”

Section: Introductionmentioning

confidence: 99%

Ultra-fast Adaptive Frequency-controlled Hysteretic Buck Converter for Portable Devices

Kim¹,

Kong²

2016

JSTS:Journal of Semiconductor Technology and Science

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Abstract-The paper describes a hysteretic buck converter including a differentiator and an adaptive hysteresis window controller. Differentiating the feedback signal achieves ultra-fast switching of the buck converter. The adaptive hysteresis window control allows a monotonous operation with predictable noise spectrum, and gives way to efficient design for variable supply and output voltages. The measurement results in a 0.13-μm CMOS process indicated that the switching frequency became double times higher, and the voltage ripple was reduced by up to 69%. They also indicated that the normalized switching frequency variation was reduced by 74% with variable V DD and by 63% with variable V OUT . The power efficiency was improved by 3.5% depending on loading condition. Index Terms-Hysteretic buck converter, adaptive hysteresis window control, variable supply voltage

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Section: Introductionmentioning

confidence: 99%

Ultra-fast Adaptive Frequency-controlled Hysteretic Buck Converter for Portable Devices

Kim¹,

Kong²

2016

JSTS:Journal of Semiconductor Technology and Science

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show abstract

“…High-quality power supplying converters that can accomplish low-cost and high-efficiency performance are demanded. As to the conventional PWM control, a complicated compensated network is needed to ensure its stable operation [1,2]. Thus it brings many difficulties for the designers and wastes large time and cost.…”

Section: Introductionmentioning

confidence: 99%

Adaptive hysteresis band control for converter with low output ripple and constant switching frequency

Liu

Zhao

Dai

et al. 2013

2nd IET Renewable Power Generation Conference (RPG 2013)

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This paper presents a new adaptive hysteresis band control (AHBC) technique for hysteresis DC-DC buck converter, which can adaptively adjust the hysteresis band according to input and output voltages. This technique was designed by PSIM. Simulation results show that the proposed AHBC has lower output ripple than the constant hysteresis window technique when output capacitance reduces. Although the load was changed, the constant switching frequency can be kept. The steady state ripple voltage of the proposed converter is also better than the conventional PWM converter.

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A single-inductor programmable-output (SIPO) DC-DC converter for low power applications

Wey

Hsu

2013

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

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A fast hysteretic buck converter with adaptive ripple controller

Cited by 8 publications

References 4 publications

Ultra-fast Adaptive Frequency-controlled Hysteretic Buck Converter for Portable Devices

Ultra-fast Adaptive Frequency-controlled Hysteretic Buck Converter for Portable Devices

Adaptive hysteresis band control for converter with low output ripple and constant switching frequency

A single-inductor programmable-output (SIPO) DC-DC converter for low power applications

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