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TPS2043B限流问题

Other Parts Discussed in Thread: TPS2043B

你好,

     从规格书看到TPS2043B三路限流是独立的, 每路恒流是500mA?但是有个下面的描述就不知道怎么回事?

Accurate Current Limit
(0.75 A Minimum, 1.25 A Maximum)

     客户实际测试单口输出时,先是系统上电,TPS2043B的EN拉低,使能好的,然后端口带负载,能带到1.5A都没有限流?不知道怎么回事?

附件原理图中EN是拉低的。