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TPS65135输出的问题

Other Parts Discussed in Thread: TPS65135

我用TPS65135给LCD提供+/-5.5V的电压,开始用万用表测量电压正常,但是发现屏不能亮,后来用万用表测量发现输出非常不正常,但是从波形看也不像是DCDC工作的波形,频率只有200Hz左右

我的输出滤波电容已经是10uF的钽电容了。这么低的频率电容估计是没办法滤平的。为什么会这样?