Improvement of Power-Conversion Efficiency of a DC–DC Boost Converter Using a Passive Snubber Circuit

Yun, Jae-Jung; Choe, Hyung-Jin; Hwang, Young-Ho; Park, Yong-Kyu

doi:10.1109/tie.2011.2141095

Cited by 70 publications

(28 citation statements)

References 25 publications

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“…Various techniques are used to increase the power capabilities of the basic converters, including interleaved or multiphase converters, bidirectional dcto-dc converters [12], [13], multiple input converters [14], cascaded output converters, high voltage supplies [15], [16], snubbers [17], and various control techniques [18]- [21]. Flyback circuits use an extra winding, namely a catch winding, and suffer from leakage effects and duty cycle limitations to ensure magnetic core flux reset.…”

Section: Introductionmentioning

confidence: 99%

Transformer Isolated Buck-Boost Converters

Williams

2016

RESD

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-Of the single-switch dc-to-dc converters, those with the buck-boost voltage transfer function offer the best potential for transformer coupling, hence isolation, at the kilowatt level. This paper highlights the limitations of the traditional magnetic coupled, buck-boost topology. Then four split-capacitor transformer-coupled topologies (specifically the Cuk, sepic, zeta, and new converters) with a common ac equivalent circuit, that do not temporarily store core magnetic energy as does the traditional isolated buckboost converter nor have a core dc magnetizing current bias as with the sepic and zeta transformer coupled topologies, are explored. Core dc bias capacitive voltage compensation is a practical design constraint in three of the four topologies, while all four must cater for stray and leakage inductance effects. Simulations and experimental results for the new converter at 408W that support the transformercoupled, single-switch dc-to-dc converter concepts are investigated.

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Section: Introductionmentioning

confidence: 99%

Transformer Isolated Buck-Boost Converters

Williams

2016

RESD

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“…DC-DC converter that is widely used in power conversion system because it possesses a simple structure consists of a few components. Therefore it can easily be designed and implemented using an inexpensive simple circuit [4]. In most applications, high power conversion efficiency is required for all operation conditions [5].…”

Section: Introductionmentioning

confidence: 99%

Mode-Selectable High-Efficiency Low-Quiescent-Current Synchronous Buck DC–DC Converter

Shi

Jia

2014

IEEE Trans. Ind. Electron.

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In this paper, a mode-selectable synchronous buck DC-DC converter with high-efficiency and low-quiescent current is proposed, which is suitable especially for using as a Li-on battery charger. The high efficiency is obtained by applying dynamic power management technology under light-load, which makes some modules of the chip enter to sleep state and the quiescent current of the whole chip down to 45 µA. At the same time, power MOS (Metal-Oxide Semiconductor) devices are also shut down to decrease the dissipation of the system. A simple loop compensation method is also proposed, which can eliminate the influence brought by high equivalent resistance of output's capacitor on the stability of the system loop. The converter has been made with a 0.5 μm CMOS (Complementary Metal-Oxide-Semiconductor) process. Experimental results show that the peak efficiency is 94% at output current 100 mA when the supply voltage is 2.7 V. Moreover, the output voltage can recover within 14 μs at 400 mA load step.

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“…So, the complexity of the control and snubber circuits is not increased [23]. Till now, many passive snubbers have been introduced for power converters [24]- [30]. In [24], a lossless passive snubber is introduced which uses two coupled inductors to provide soft switching conditions.…”

mentioning

confidence: 99%

“…Although, the saturable inductor causes to obtain ZCS condition for the converter switch, it results in voltage ringing during turning the converter switch off. In [30], although the snubber circuit is successful in providing ZCS condition at turn on for the converter switch, it cannot provide soft switching condition at turn off instant. A family of lossless passive soft switching methods is introduced in [31] in which the converter switch voltage stress is not clamped.…”

mentioning

confidence: 99%

“…In this snubber, the stored energy in the snubber's capacitor is delivered to the output voltage that decreases the converter circulation losses. Usually, passive snubber cells are adopted for a special converter [26]- [30]. In this snubber, the stored energy in the snubber's capacitor is delivered to the output voltage that decreases the converter circulation losses.…”

mentioning

confidence: 99%

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Family of Soft-Switching Single-Switch PWM Converters with Lossless Passive Snubber

Mohammadi

Adib

Yazdani

2014

IEEE Trans. Ind. Electron.

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To increase the power conversion density, decrease switching losses and electromagnetic interference (EMI) and provide safe operating area (SOA) for switch, applying snubber circuits which provide soft switching conditions is inevitable. Among different types of snubber circuits, passive snubbers due to their simplicity and robustness are preferred. These snubber circuits can obtain soft switching conditions without any additional switch. Thus, gate drive and control circuits remain simple. In this paper, a simple lossless passive snubber circuit which can be applied on isolated and non-isolated converters is introduced. The proposed snubber circuit provides ZCS and ZVS conditions at turning on and off instants, respectively. The proposed snubber is applied on a boost converter and analyzed. Also, in order to prove the effectiveness of the proposed snubber circuit from the converter efficiency and EMI viewpoints, a 200W prototype boost converter is implemented and experimental results are presented. Also, the simulation results of a soft switched flyback converter with the proposed snubber cell are presented.

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Improvement of Power-Conversion Efficiency of a DC–DC Boost Converter Using a Passive Snubber Circuit

Cited by 70 publications

References 25 publications

Transformer Isolated Buck-Boost Converters

Transformer Isolated Buck-Boost Converters

Mode-Selectable High-Efficiency Low-Quiescent-Current Synchronous Buck DC–DC Converter

Family of Soft-Switching Single-Switch PWM Converters with Lossless Passive Snubber

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