
大家好,驱动输出是串接12颗LED,电流设为2.8A,RF电阻设为470R。
测试发现CS脚纹波很大,如何消除呢?
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Hi
从波形看,你首先要排除一下示波器测试的问题,见附件。
其次要在layout上改善,建议严格参照datasheet里面指导来做。
你也可以在芯片CS脚处增加一个几十pF的电容看看。