• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 39 subscribers
  • Views 483 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.

PMP4451: How MCU controls those four LEDs?

Jim CHEN
Expert 4795 points

Part Number: PMP4451

Dear Team,

My customer refer to PMP4451 to design its power bank. And he want to use four LEDs to be battery capacitor indicators. 

Because in PMP4451 document, it doesn't specify any detail about LED control.

Could you let me know how to achieve this feature my customer wants?

Thank you.

Regards,

Jim

  • 0
    TI__Prodigy 670 points

    Hi Jim,
        The original designer has been leave TI for a while. I had checked our own folder that neither found any LED operating indication been specified. As I knew, it's controlled by MSP430. We have the code can provide if you need. I will check with other members who related on this project to getting know if any LED operation info they knew it.

    Regards,

    Richard

  • 0
    TI__Intellectual 1125 points

    Hi, Jim

    The PMP4451 reference design LED is not for capacitor indicators. LED in PMP4451 is designed for debugging.

    If your customer want to do the battery capacitor indictors. Customer firmware engineer need to add the program that calculates the battery capacitor. Generally, rough methods is MCU read the battery voltage to set the LED indicating battery capacitor. More accurate methods is to use the Coulomb integrity.