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LM3643 & LM3644 选料

Other Parts Discussed in Thread: LM3643, LM3644

您好 最近在选择使用LM3643或是LM3644

从规格上来看LM3643的LED电流有限制总和不能大于1.5A

而LM3644则没有

但是跟你们买回来IC测试后却发觉LM3643也可以大于1.5A?

那这两颗到底有什么不同 我该如何选择?