High frequency resonant SEPIC converter with wide input and output voltage ranges
High frequency resonant SEPIC converter with wide input and output voltage ranges
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DOI：
10.1109/pesc.2008.4592131
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发表时间：
2008-06
期刊：
影响因子：
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通讯作者：
Jingying Hu;A. Sagneri;Juan M. Rivas;Yehui Han;Seth M. Davis;David J. Perreault
中科院分区：
文献类型：
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作者：
Jingying Hu;A. Sagneri;Juan M. Rivas;Yehui Han;Seth M. Davis;David J. Perreault
本文提出了一种适用于高频（HF）和甚高频（VHF）DC-DC功率转换的谐振SEPIC转换器和控制方法。所提出的设计具有在宽输入和输出电压范围内的高效率、上下电压转换、小尺寸和优异的瞬态性能。此外，提出了一种谐振栅极驱动方案，该方案在HF和VHF频率下提供快速启动和低损耗。转换器使用以固定频率调制的开关控制方案来调节输出。该控制方法能够实现快速瞬态响应和高效轻负载操作，同时提供输入和输出波形的受控光谱特性。一个实验样机已经建成和评估。原型转换器采用两个商用垂直MOSFET构建，工作在20 MHz的固定开关频率下，输入电压范围为3.6 V至7.2 V，输出电压范围为3 V至9 V，额定输出功率高达3 W。该转换器在整个输入电压范围内实现高于80%的效率，在标称输出电压，并保持良好的效率在整个工作范围内。
This document presents a resonant SEPIC converter and control method suitable for high frequency (HF) and very high frequency (VHF) dc-dc power conversion. The proposed design features high efficiency over a wide input and output voltage range, up-and-down voltage conversion, small size, and excellent transient performance. In addition, a resonant gate drive scheme is presented which provides rapid startup and low-loss at HF and VHF frequencies. The converter regulates the output using an on-off control scheme modulating at a fixed frequency. This control method enables fast transient response and efficient light load operation while providing controlled spectral characteristics of the input and output waveforms. An experimental prototype has been built and evaluated. The prototype converter, built with two commercial vertical MOSFETs, operates at a fixed switching frequency of 20 MHz, with an input voltage range of 3.6 V to 7.2 V, an output voltage range of 3 V to 9 V and an output power rating of up to 3 W. The converter achieves higher than 80% efficiency across the entire input voltage range at nominal output voltage, and maintains good efficiency across the whole operating range.