电压型BUCK的MATHCAD计算
时间:10-02
整理:3721RD
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这篇文章会介绍电压型BUCK的相关计算,以ST的L7987为例,L7987是典型的电压型控制芯片,并且有输入电压前馈,因为电压型BUCK功率部分的传递函数受输入电压的影响,如果没有该前馈,对于不同输入电压就会有不同的环路特性,这样不利于设计,具体的可以参考L7987的datasheet。
下面会贴出我写的MATHCAD文档,该文档画出了电感以及功率器件的电流波形,另外输出电容也分别用电解电容和陶瓷电容做分析,最后也用仿真验证了计算的正确性。
有要原文档的,可以联系我,同样的如果发现错误请帮忙提醒,万分感谢,如果有看不懂的地方也欢迎讨论。
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文章来源:融创芯城
非常棒的资料 感谢分享
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