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LMP7721: LMP7721MAX/NOPB 1500 T04988779 丝印颜色不一致

Part Number: LMP7721

LMP7721MAX/NOPB  1500  T04988779  丝印颜色不一致

1.正面丝印颜色不一致,部分显白,部分信黄

2.,芯片背面有方形印记,洗板液擦拭后会淡化一点请问是否正常