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TSS521-MBUS水表供电不足问题

Other Parts Discussed in Thread: TSS521

1.Mbus:TSS521根据参考电路设计完成PCB样机,目前测试结果如下:

A.通讯目前可以实现功能

B.供电电流不够:当供电电流在1mA时候电压会从3.3V降低到2.8V.实际的总线需要的供电电流在2mA.