Self-Driven Synchronous Rectification Scheme Without Undesired Gate-Voltage Discharge for DC-DC Converters With Symmetrically Driven Transformers
Self-Driven Synchronous Rectification Scheme Without Undesired Gate-Voltage Discharge for DC-DC Converters With Symmetrically Driven Transformers
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DOI：
10.1109/tpel.2007.914204
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发表时间：
2008-01
影响因子：
6.7
通讯作者：
T. Qian;Weizhang Song;B. Lehman
中科院分区：
文献类型：
--
作者：
T. Qian;Weizhang Song;B. Lehman
本文提出一种新的自驱动同步整流方案，适用于变压器对称驱动且输入电压范围较宽的直流-直流变换器。驱动信号从输出电感获得。利用两个辅助开关来适当地关断主开关。两个额外的辅助开关，这是由一个延迟的信号从电感控制，增加，以避免不希望的栅极放电。该方法效率高，适合于实际应用。基于36-75 V输入，2.5 V/30 A输出的原型的实验结果被示出，以验证所提出的方案。
This paper proposes a new self-driven synchronous rectification scheme for dc-dc converters with symmetrically driven transformers and wide input voltage range. The driving signals are obtained from the output inductor. Two auxiliary switches are utilized to turn off the main switches properly. Two extra auxiliary switches, which are controlled by a delayed signal from the inductor, are added to avoid the undesired gate discharge. This approach can achieve high efficiency and is suitable for practical applications. Experimental results based on a 36-75 V input, 2.5 V/30 A output prototype are shown to verify the proposed scheme.