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TPS40211做升压恒流源问题。

Other Parts Discussed in Thread: TPS40211

请教Ti高工,用TPS40211做升压恒流源请问(12输入,50V输出,0.5A):1.空载输出电压这样设定?我现在的空载是失控的,老是烧输出的稳压二极管,好像是开环状态;2.输出电流怎样设计控制?我的按规格书上设计好像不行,我按规格书上算:0.26V/0.3A=0.86欧姆,现在实际做出来是要用到3欧姆才能达到想要的电流。现在恒流时负载调整率很正常,效率也有90