• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 33 subscribers
  • Views 276 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS65987D: Overcurrent Clamp Points not mentioned in the datasheet

Roy Hsu
Genius 9390 points
Part Number: TPS65987D

Hi Team,

The table showing "Overcurrent Clamp Firmware Selectable Settings" gives a range up to 5.697 ~ 6.963A but does not show other settings higher than 6.963A. Do you have another table including all available settings?

In page 10 of the App. Note "TPS65987DDH Power Path Performance and Protection". it says:

"Likewise, setting a PDO in the configuration tool to 3 A with 200% peak current would equate to a 6 A setting. The internal firmware in that case would select the IOCC programmable setting to be the one with
the minimum setting of 6.180 A and the maximum setting of 7.553 A. That means the overcurrent clamp point would be between 6.180 A and 7.553 A for a PDO set to 3 A with 200% peak current." 

Which indicates there are more settings than the given ones in the datasheet. Could you help provide those?

Thanks!

Roy

  • 0
    TI__Expert 8020 points

    Roy, There are no additional settings in there. FW will use maximum value when Iocc of 200% is exceeding the max current setting. Also note that for HV sourcing the current clamping is not use. Current clamping is only used for 5V PDO. Here is an Application note that give some insight in to this.

    https://www.ti.com/lit/pdf/slva994

  • 0 in reply to Ghouse Mohiuddin23
    TI__Genius 9390 points

    Hi Ghouse,

    I understand that current clamping is only used for a 5V-PDO. For >5V PDOs, FW OCP is used.

    However, your explanation on the maximum value conflicts with the highlighted sentences in the Slva994 App. Note.

    The range between 6.18A and 7.553A is missing in the Iocc table and you said that every other value larger than 6.963A will be considered as 6.963A. So does the range between 6.18A and 7.553A exist? Or that's an error in the App. Note?

    Thanks!

    Roy

  • 0 in reply to Roy Hsu
    TI__Expert 8020 points

    Roy Hsu, 

    Always follow the Datasheet. You are right, the App note is out dated. There was a setting, but those settings now are not available now. Also note that user cannot program these settings. FW has control over this and FW will set max value to Typ. 6.330A.