TPS55288: TPS55288 FB/INT PIN Problem

Intellectual 295 points

user5345709

Replies: 4

Views: 70

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 !

    

• TPS55288

Intellectual 295 points

user5345709

• Oct 10, 2020 3:54 AM
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4 Replies

• Mastermind 40075 points

  

  Helen chen

  

  • Oct 10, 2020 10:16 AM

  Dear Sir,

  Could you please share the schematic with us, does the INT pin pulled high? Please refer to the TPS55288EVM board, there's a 100k ohm resistor pull high to a 5V VCC.

  Best Regards,
  Helen

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• Prodigy 20 points

  

  user4720651

  

  • Oct 12, 2020 2:57 AM

  In reply to Helen chen:

  Dear helen：

  The circuit diagram is as follows, we have a pull-up resistor, and the software is set to internal FB function.

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  user4720651

  

  • Oct 12, 2020 3:03 AM

  In reply to user4720651:

  

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• Mastermind 40075 points

  

  Helen chen

  

  • Oct 12, 2020 10:18 AM

  In reply to user4720651:

  Dear Sir,

  I checked on the EVM board, the INT function is good.

  Please check the setting in your I2C, is it well set? Please compare with below picture.

  Best Regards,
  Helen

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