基于Buck电源模块的驱动和电流采样电路的研究
作者:马明明,方宇 上传时间:2015/8/20 17:21:35
摘要:本文研究了一种非隔离高频降压开关电源模块[1-3],该电源模块采用Buck电路拓扑。在传统Buck电路的基础上做了两点改进:首先,针对传统的Buck电路提出了一种新型的驱动方式,这种驱动电路不需要隔离电源或光耦;另外提出了一种新型的电流采样电路,这种采样电路无需额外的电流传感器。通过对这两方面的研究和改进,可有效提高基于Buck电路电源模块的效率和稳定性,并大大降低电源模块的成本。最后实验验证了所研究电路的合理性。
叙词:直流变换器/电源模块/驱动电路/电流采样
Abstract:A non-isolated high frequency step-down switching power supply module is studied, and the Buck topology is employed in this power module. Based on the traditional Buck circuit two improvements have been achieved. First, a novel driving scheme is proposed for the traditional Buck circuit, there is no additional isolated power supply or optoisolator in this new driving circuit. Additionally, a new type of current sampling method is also put forward in this paper, and there is no extra current sensor in this sampling circuit. High efficiency, reliability and cost down have been accomplished with the improvements of these two aspects. Finally the experimental results verify the presented circuits.
Keyword:DC Converter , Power module , Driving circuit , Current sampling
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