Tapped-Inductor Buck Converter for High-Step-Down DC–DC Conversion

Yao, Kaiwei; Ye, Mao; Xu, Ming; Lee, F.C.

doi:10.1109/tpel.2005.850920

Cited by 238 publications

(94 citation statements)

References 7 publications

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“…Recently, an IBC with two coupled inductors are introduced [6,7]. Moreover, a high step-down conversion ratio is obtained and the switching losses can be reduced.…”

Section: Iiliterature Surveymentioning

confidence: 99%

Closed Loop Control of Transformerless Interleaved High Step-Down Conversion Ratio DC-DC Converter

Salna.V.A¹

2015

IJAREEIE

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This paper proposes closed loop control of transformerless interleaved high step-down conversion ratio dc-dc converter. The proposed converter utilizes two input capacitors which are series charged by the input voltage and parallel discharged by a new two phase interleaved buck converter for providing much higher conversion ratio without adopting an extreme short duty cycle. The proposed converter features uniform current sharing characteristic of the interleaved phases without adding extra circuitry. It also reduces the voltage stress of both switches and diodes. This will allow one to choose MOSFETs with low voltage rating to reduce both conduction and switching losses. Closed loop PI controller is used to control the error and finally achieves the desired output voltage. The operation principles, steady state analysis and comparison with other existing topologies are presented. Simulation results are presented to demonstrate the effectiveness of the converter. KEYWORDS:High step down conversion ratio, Interleaved Buck Converter (IBC), Closed loop, PI controller. I.INTRODUCTIONNowadays, for the increasing high step down ratios with high output current applications such as battery chargers, distributed power systems and VRMs of CPU boards, high performance dc-dc converters have been used. The conventional IBC is required operating at higher switching frequencies for high-input and low-output voltage applications, that will increase both switching and conduction losses. It also experiences an extremely short duty cycle in the case of high-input and low-output voltage applications [1]. Many step-down converters have been proposed to overcome the drawbacks of conventional IBC. II.LITERATURE SURVEYA quadratic buck converter [2] is synthesized by cascading two dc-dc buck converters. It can operate with wider ranges of step-down conversion ratio than conventional IBC but the efficiency is very poor. A three level buck converter [3] possess higher efficiency and better performance than the conventional IBC due to reduced voltage stress across the switch (half of the input voltage). However, so many components are required for this converter. An IBC with single capacitor turn off snubber is introduced in [4].By using this the switching loss associated with turn-off transition can be reduced and the single coupled inductor implements the converter as two output inductors, still the voltage across all the elements is same as input voltage.To reduce the switching losses, an active clamp IBC is introduced in [5], here all the switches are turned on with zero voltage switching (ZVS) whereas it requires additional passive elements and active switches, which increases the cost at low or middle levels of power applications. Recently, an IBC with two coupled inductors are introduced [6,7]. Moreover, a high step-down conversion ratio is obtained and the switching losses can be reduced. However, the leakage energy needs to recycle. A new extended duty ratio multiphase topology has been proposed to deal with a small duty...

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“…Recently, an IBC with two coupled inductors are introduced [6,7]. Moreover, a high step-down conversion ratio is obtained and the switching losses can be reduced.…”

Section: Iiliterature Surveymentioning

confidence: 99%

Closed Loop Control of Transformerless Interleaved High Step-Down Conversion Ratio DC-DC Converter

Salna.V.A¹

2015

IJAREEIE

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“…However, they do not lower the voltage conversion ratio [4]. Tapped and coupled inductor buck converter can achieve the high step down conversion ratio by using proper number of turn ratio, but there exists some leakage inductance which causes high voltage spikes on the switches [5,6,7]. Switched capacitor technique can provide high step down voltage without operating at low duty cycle.…”

Section: Introductionmentioning

confidence: 99%

An integrated inverted and non-inverted buck converter

Farooq

Sun

Chen

2016

IEICE Electron. Express

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In this paper a new topology of high step-down dc-dc converter is proposed. The proposed converter uses an interleaved structure with one phase using a traditional buck converter and the second phase uses its inverted version. By this technique a high step down voltage conversion can be achieved as compared to the traditional interleaved buck converter. Operating principle and steady state analysis of proposed converter is given. An experiment is carried out on a 25 V input, 5 V/1 A output laboratory prototype to obtain experimental results and verify the effectiveness of the proposed converter. An efficiency of 83.7% is achieved at the rated load and a maximum efficiency of 88% is achieved at 0.5 A load current.

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“…High frequency transformer can effectively realize step down the input voltage with different controlled switch devices. Commonly, fly back converter was often applied to design different kinds of auxiliary power, or applied to small power conditions [9][10][11]. Each output voltage was realized by matching the by turns ratio between the output voltage of main path, to make the final output voltage stability.…”

Section: Introductionmentioning

confidence: 99%

Multi-output current source with ripple cancellation by optimal magnetic components

Zhang¹,

Zhang²,

Liu³

2016

Proceedings of the 2016 International Conference on Advanced Electronic Science and Technology (AEST 2016)

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Abstract. High integration, high power density has become the development trend of power supply. Computer, automobile and aviation often require multiple output power, in order to meet all kinds of load, and the filter of current type output for the power supply should be a larger challenge. The input voltage becomes wide and high, and each output is low voltage with large current. Compared to the non-isolation topologies, isolation topologies have better ability of step-up/down. In this paper, the two-stage converter structure is used, in which the forward stage is used to step down the amplitude of the input voltage, and the backward stage achieved precisely multiple current output with independent control. Also optimization and design of the transformer and output filters have been made clearly, to solve the problems of cross regulation, stability, and dynamic response in traditional structure. Finally, four-currentoutput prototype with 80-100V input, 8A/10V, 8A/10V, 6A/20V, and 6A/20V outputs is built, and the analysis is verified by the experimental results.

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Tapped-Inductor Buck Converter for High-Step-Down DC–DC Conversion

Cited by 238 publications

References 7 publications

Closed Loop Control of Transformerless Interleaved High Step-Down Conversion Ratio DC-DC Converter

Closed Loop Control of Transformerless Interleaved High Step-Down Conversion Ratio DC-DC Converter

An integrated inverted and non-inverted buck converter

Multi-output current source with ripple cancellation by optimal magnetic components

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