• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 887 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

FUSION_DIGITAL_POWER_DESIGNER: Importing System Files

Eric Fu51
Prodigy 90 points

Part Number: FUSION_DIGITAL_POWER_DESIGNER

Hi,

I am trying to import a system file into my device (TPS53622) using the Fusion Digital Power Designer. For some reason, when I import the file with the device connected, all of the settings match the system file except Iout OC Warn Limit and Iout OC Fault Limit. However, when I import the file in offline mode, all of the settings including the Iout OC Warn Limit and Iout OC Fault Limit are there. Am I missing a parameter when I export the system file?

Thanks,

Eric Fu

  • 0
    TI__Mastermind 31580 points
    Hi Eric,

    We are working on finding the right person to support your application question, you should see a response later today.

    Regards

    Peter
  • 0 in reply to Peter Meaney
    TI__Genius 11095 points

    Hi Eric,

    For this device, the IOUT_OC_FAULT_LIMIT and IOUT_OC_WARN_LIMIT PMBus commands have only indirect NVM back-up. These are both related to the programmed IOUT_MAX parameter, which is an 8-bit value (1 A / LSB ) the device uses to do digital scaling internally, based on the maximum expected output current for the design. For Intel applications, this value corresponds to the "ICCMAX" value for the design. 

    At each power-up, IOUT_OC_WARN_LIMIT is restored to IOUT_MAX, and IOUT_OC_FAULT_LIMIT are restored to 1.25*IOUT_MAX. During operation you can change IOUT_OC_FAULT and IOUT_OC_WARN limits, and the device behavior will track the value you program, but at power-up these commands will always be restored based on the IOUT_MAX parameter. 

    For example: if you set IOUT_MAX = 100A, then at power-on IOUT_OC_WARN_LIMIT = 100 A, and IOUT_OC_FAULT_LIMIT = 125A. If you then change IOUT_OC_FAULT_LIMIT to 130A, the device will track this (it will trigger OCP at 130A instead of 125A). But, unless you change the value of IOUT_MAX, it will return to 125A following a power-cycle, even if you issue an NVM Store operation.

  • 0 in reply to Matt Schurmann
    Prodigy 90 points

    Thank you Matt for the response!! You have answered my question.