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TPS55288: TPS55288 FB/INT PIN Problem

Part Number: TPS55288

Dear TI support 

     Can you help check , Why I use TPS55288  PIN14( FB/INT)  the function not implemented?


     I use internal feedback, and external pull-up resistors, According to the function, it should be pulled down if there is a problem, but now OK work is also pulled down, please help to confirm, or point out how I need to use the abnormal function of FB/INT, I need to use this PIN to judge the working status。


    Thanks !