• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 369 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.

Original question:

BQ25703A: bq25703A / COMP pin RC network

BQ25703A: COMP1 & COMP2 Pins

Thomas McCue1
Prodigy 10 points
Part Number: BQ25703A

Is there more information available on pins 16 & 17, COMP1 & COMP2? The datasheet says to reference the EVM for the RC network. The EVM schematic only lists the values used. Beyond that, I do not see any other information on these pins in the datasheet nor the EVM guide. I understand these are compensation for the buck boost converter but would like to know why the specific values in the RC network were chosen and if the values should be modified for specific applications.

  • 0
    TI__Mastermind 25800 points

    Hey Thomas,

    In general, we do not recommend changing the values of the COMP1 and COMP2 components. These have been specifically chosen to make all regulation loops (charging, battery voltage, input current limit, etc.) stable across the entire operating range of the charger (VBUSmin to VBUSmax, VBATmin to VBATmax). Modifying the networks could have unintended impacts to the stability of the one or more of the loops.

    The only consideration we have for the network based on component selection is found here: https://e2e.ti.com/support/power-management/f/196/t/871078

    It will describe how to adjust the resistance in the COMP2 RC network if using a different inductance value than 2.2uH.

    Regards,

    Joel H