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UC3907启动问题

Other Parts Discussed in Thread: UC3907, UCC28250

用3907设计的电源模块,DC52V/5A,当多个模块并联轻载(0.1W左右)启动时,总有模块启动不了,必须带假载(8W左右)启动才行,怎样解决这个问题?

Sheet1.rar