Small signal transfer functions modeling and analysis for open loop KY converter

Wang, Faqiang; Zhang, Yichen; Ma, Xikui

doi:10.1109/isie.2013.6563713

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…To overcome such drawbacks, a boost converter called a KY converter was proposed by Hwu and Yau [1] for power electronics applications. This converter comprises a switched‐capacitor charge pump converter and a buck converter, and combines the advantages of both converters and exhibits the characteristics of non‐pulsating output current, low‐output voltage ripple and no RHPZ in CCM [1, 3]. Moreover, it always operates in CCM as claimed in [1, 3].…”

Section: Introductionmentioning

confidence: 99%

“…This converter comprises a switched‐capacitor charge pump converter and a buck converter, and combines the advantages of both converters and exhibits the characteristics of non‐pulsating output current, low‐output voltage ripple and no RHPZ in CCM [1, 3]. Moreover, it always operates in CCM as claimed in [1, 3]. However, when the KY converter is implemented into a power management integrated circuit (IC), due to a small inductance, its discontinuous‐conduction mode (DCM) operation cannot be avoided for longer battery life.…”

Section: Introductionmentioning

confidence: 99%

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DCM operation analysis of KY converter

et al. 2015

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A KY converter has the characteristics of non-pulsating output current, low-output voltage ripple and no right-half plane zero in continuous conduction mode which can overcome the drawbacks of the conventional boost and buck-boost converters. However, when the KY converter is implemented into an integrated circuit, its discontinuous conduction mode (DCM) operation cannot be avoided due to a small-inductor value. The boundary for the DCM operation region, DCM dc voltage and small-signal transfer functions are proposed, which fill the gap of the DCM operation theory for the KY converter. Simulation results, using MATLAB and Cadence, are provided to verify the deduced DCM operation theory of the KY converter. The DCM closed-loop controller design can be achievable in future. Introduction: Voltage boosting dc-dc converters are required in many computer, communication and consumer electronics products, such as MPEG-3 (MP3) players, personal digital assistants etc. For such applications, output voltage ripple and noise should be taken into consideration. As for conventional voltage-boosting converters, such as boost, buckboost converters, their output currents are pulsating, thereby causing the output voltage ripple to be large [1]. Moreover, they have a right-half plane zero (RHPZ) in the continuous conduction mode (CCM), thereby lowering system stability and degrading the load transient response [2]. To overcome such drawbacks, a boost converter called a KY converter was proposed by Hwu and Yau [1] for power electronics applications. This converter comprises a switched-capacitor charge pump converter and a buck converter, and combines the advantages of both converters and exhibits the characteristics of non-pulsating output current, low-output voltage ripple and no RHPZ in CCM [1, 3]. Moreover, it always operates in CCM as claimed in [1, 3]. However, when the KY converter is implemented into a power management integrated circuit (IC), due to a small inductance, its discontinuous-conduction mode (DCM) operation cannot be avoided for longer battery life. This Letter presents a DCM operation analysis of the KY converter.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DCM operation analysis of KY converter

et al. 2015

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“…1+D(2n+1)/1-D is above 90.38% wherever the load is run and can be up to 92.29%. The inactive snubber is used to diminish the voltage spike on the change to grow the viability of this converter[78]. KY and buckboost convertersVoltage GainVo/Vi = 1+(NS/Np -1) D/1-DFPGA with PI ControllerThe boundary condition for the polarizing inductor and output inductor is intended to keep the activity of the converter in a positive current area.With the proper plan determination, the control strategy increases the voltage gain of the proposed converter[79].…”

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confidence: 99%

Comprehensive Review of KY Converter Topologies, Modulation and Control Approaches With Their Applications

Kumar¹,

Raja²,

Sanjeevikumar

et al. 2022

IEEE Access

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In the current scenario, the challenging task of designing a DC-DC converter has high voltage gain and small output ripple waves, which researchers deal with in highly complicated Because of its topological and continuous conduction mode (CCM), the KY converters have developed a better converter than all the traditional DC-DC converters to overcome this intricacy of voltage transfer gain and output ripple waves. The KY converters had various qualities when compared with the boost converter with Synchronous Rectifier (SR). The KY converter is used in photovoltaic and sustainable power applications, which are examined in this study. For example, the KY converter incorporates mode-1 and mode-2 operation and its types, for example, one plus D and one plus 2D, where the KY can deliver the Nth type of KY converter. This article provides a comprehensive review and investigation of the KY converters, which incorporates their topology with control methodologies, Pulse Width Modulation (PWM) techniques, working activity of KY converters, and types for mode-1 and mode-2; it interprets the few strategies the KY converter executes and its applications.

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A High Conversion Ratio and 97.4% High Efficiency Three-Switch Boost Converter With Duty-Dependent Charge Topology for 1.2-A High Driving Current and 20% Reduction of Inductor DC Current in MiniLED Applications

Lin

Huang

et al. 2022

IEEE J. Solid-State Circuits

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Small signal transfer functions modeling and analysis for open loop KY converter

Cited by 5 publications

References 10 publications

DCM operation analysis of KY converter

DCM operation analysis of KY converter

Comprehensive Review of KY Converter Topologies, Modulation and Control Approaches With Their Applications

A High Conversion Ratio and 97.4% High Efficiency Three-Switch Boost Converter With Duty-Dependent Charge Topology for 1.2-A High Driving Current and 20% Reduction of Inductor DC Current in MiniLED Applications

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