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TPS56121电源输出纹波问题

Other Parts Discussed in Thread: TPS56121

用TI得tps56121搭了一下电路

电感实际使用2r2和1R0得电感都进了测试 ,但是输出端得电源纹波如下图所示,电源纹波较大且有高频部分,请帮忙分析原因