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LM3481的Vin 输入脚接到升压后的电压,这种用法可靠吗?

Other Parts Discussed in Thread: LM3481

 LM3481的Vin 输入脚接到升压后的电压,这种用法可靠吗?有什么优点?Vin接到二极管D1的后端,有谁给解释下?