Flyback-Based Multiple Output dc-dc Converter with Independent Voltage Regulation

Tahan, Mohammad; Bamgboje, David; Hu, Tingshu

doi:10.1109/pedg.2018.8447884

Cited by 13 publications

(6 citation statements)

References 20 publications

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“…For reference [11] it is necessary to develop an RCD snubber to absorb the energy of leakage inductance. References [12][13][14][15][17][18][19] require an expensive controller to implement. References [16,21] require a transformer for each output.…”

Section: Experiments Results and Discussionmentioning

confidence: 99%

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Three-Output Flyback Converter with Synchronous Rectification for Improving Cross-Regulation and Efficiency

Leng

Chiu

2021

Electronics

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This paper proposes a single stage alternating current/direct current (AC/DC) flyback converter which contains three output windings with synchronous rectification (SR) function to achieve better cross-regulation and efficiency. Because the three output windings are stacked in a series structure and use synchronous rectification instead of diode rectification, the forward conduction loss of the diode can be eliminated, and the current of each winding can flow bilaterally. Therefore, the energy of leakage inductance can be dissipated through heavy load winding without transient overvoltage in light load winding. Compared with existing methods in the literature, the proposed converter can be realized by simple analog IC with fewer winding turns. Finally, under the extreme load imbalance condition, the cross-regulation is still within ±2.26%. The maximum efficiency of the proposed converter reaches 87%, which is about 3% higher than the conventional Schottky diode solution’s efficiency. The circuit structure and operation principle are described. A practical prototype and experiment results are implemented to verify the feasibility of the proposed converter.

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Section: Experiments Results and Discussionmentioning

confidence: 99%

“…The dynamic model predictive voltage control [12] to achieve two output voltages is regulated individually. A time multiplexing switching with series buck converters scheme [13] is a two stage converter.…”

Section: Introductionmentioning

confidence: 99%

Three-Output Flyback Converter with Synchronous Rectification for Improving Cross-Regulation and Efficiency

Leng

Chiu

2021

Electronics

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“…Multi-output converters can be utilized when different types of output voltages are required in power conversion applications. As the need for multi-output power supply in various industrial applications such as telecommunication equipment and medical devices increases, studies on multi-output converters with simple structure, high efficiency, and improved cross regulation characteristics are being actively conducted [1][2][3][4][5][6][7][8]. As part of these studies, a new multi-output converter called fly-buck converter has been proposed in [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design for Output Voltage Regulation in Constant-on-Time-Controlled Fly-Buck Converter

Cho¹,

Jang²

2021

Electronics

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Fly-buck converter is a multi-output converter with the structure of a synchronous buck converter structure on the primary side and a flyback converter structure on the secondary side, and can be utilized in various applications due to its many advantages. In terms of control, the primary side of the fly-buck converter has the same structure as a synchronous buck converter, allowing the constant-on-time (COT) control to be applied to the fly-buck converter. However, due to the inherent energy transfer principle, the primary-side output voltage regulation of COT controlled fly-buck converters may be poor, which can deteriorate the overall converter performance. Therefore, the primary output capacitor must be carefully designed to improve the voltage regulation characteristics. In this paper, a theoretical analysis of the output voltage regulation in COT controlled fly-buck converter is conducted, and based on this, a design guideline for the primary output capacitor considering the output voltage regulation is presented. The validity of the analysis and design guidelines was verified using a 5 W prototype of the COT controlled fly-buck converter for telecommunication auxiliary power supply.

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“…Also, the parasitic elements create a low impedance path for highfrequency currents that is severe for the converter operation. In addition, multiple-winding multiple-output solutions have to face the cross-regulation characteristics [14] or use an extra regulator for each output [15], [16] accordingly to the load requirements. These constraints leads to one transformer per SM solution although it may increase the SM volume and cost.…”

Section: Introductionmentioning

confidence: 99%

Insulated Modular Auxiliary Power Source Concept with Multiple Outputs

Lambert¹,

Seidel²,

Fiorio³

et al. 2019

Eletrônica de Potência

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This paper presents an insulated auxiliary power source with multiple outputs based on a two-stage structure, where the first-stage operates as a controlled current source and the second-stage as an active rectifier. The second-stage is replicated for each load, where the output voltage is independently controlled by a hysteresis band controller integrated to the auxiliary power source's circuit. Insulation between the multiple stages is achieved by a medium-frequency transformer for each output. The main aim of this auxiliary power supply is to feed modular multilevel converters in laboratory applications that run at the lower range of medium-voltage dc. Theoretical analysis of the auxiliary power supply is presented and verified experimentally for the converter's two main modes of operation.

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Flyback-Based Multiple Output dc-dc Converter with Independent Voltage Regulation

Cited by 13 publications

References 20 publications

Three-Output Flyback Converter with Synchronous Rectification for Improving Cross-Regulation and Efficiency

Three-Output Flyback Converter with Synchronous Rectification for Improving Cross-Regulation and Efficiency

Analysis and Design for Output Voltage Regulation in Constant-on-Time-Controlled Fly-Buck Converter

Insulated Modular Auxiliary Power Source Concept with Multiple Outputs

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