A High Efficiency DC/DC Converter for High Voltage Gain High Current Applications

Yaxiao Qin; Yun Yang; Sinan Li; Ying Huang; Siew-Chong Tan; S.Y.Ron Hui

doi:10.1109/JESTPE.2019.2908416

A High Efficiency DC/DC Converter for High Voltage Gain High Current Applications

Yaxiao Qin, Yun Yang, Sinan Li, Ying Huang, Siew-Chong Tan, S.Y.Ron Hui

Research output: Contribution to journal › Article › peer-review

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Abstract

A new class of high-voltage-gain DC-DC converters for high efficiency and transformer-less DC-DC applications where large voltage step-up ratios are required, is presented in this paper. The converter is derived from the hybrid integration of a switched-capacitor converter and a boost converter. It features high step-up voltage conversion ratio with a moderate duty cycle; non-pulsating input current; low voltage stress on all of the switches; easy implementation of control and driving circuits; scalability for high current high-power applications; and low cost due to reduced components via combination of a two-stage converter into a single-stage converter. Full soft-charging operation and minimal device voltage stresses are achieved under all operating conditions. Steady-state operations of the converter are comprehensively analyzed. A 300 W prototype of a 19-time converter achieving the peak efficiency of 96.1experimental results validating the theoretical analysis and operation of the converter are provided.

Original language	English
Pages (from-to)	2812-2823
Journal	IEEE Journal of Emerging and Selected Topics in Power Electronics
Volume	8
Issue number	3
Early online date	1 Apr 2019
DOIs	https://doi.org/10.1109/JESTPE.2019.2908416
Publication status	Published - 30 Sep 2020

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10.1109/JESTPE.2019.2908416

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title = "A High Efficiency DC/DC Converter for High Voltage Gain High Current Applications",

abstract = "A new class of high-voltage-gain DC-DC converters for high efficiency and transformer-less DC-DC applications where large voltage step-up ratios are required, is presented in this paper. The converter is derived from the hybrid integration of a switched-capacitor converter and a boost converter. It features high step-up voltage conversion ratio with a moderate duty cycle; non-pulsating input current; low voltage stress on all of the switches; easy implementation of control and driving circuits; scalability for high current high-power applications; and low cost due to reduced components via combination of a two-stage converter into a single-stage converter. Full soft-charging operation and minimal device voltage stresses are achieved under all operating conditions. Steady-state operations of the converter are comprehensively analyzed. A 300 W prototype of a 19-time converter achieving the peak efficiency of 96.1experimental results validating the theoretical analysis and operation of the converter are provided.",

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AB - A new class of high-voltage-gain DC-DC converters for high efficiency and transformer-less DC-DC applications where large voltage step-up ratios are required, is presented in this paper. The converter is derived from the hybrid integration of a switched-capacitor converter and a boost converter. It features high step-up voltage conversion ratio with a moderate duty cycle; non-pulsating input current; low voltage stress on all of the switches; easy implementation of control and driving circuits; scalability for high current high-power applications; and low cost due to reduced components via combination of a two-stage converter into a single-stage converter. Full soft-charging operation and minimal device voltage stresses are achieved under all operating conditions. Steady-state operations of the converter are comprehensively analyzed. A 300 W prototype of a 19-time converter achieving the peak efficiency of 96.1experimental results validating the theoretical analysis and operation of the converter are provided.

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