• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 63 subscribers
  • Views 90 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.

LP5866: Maximum current Isw of SW pin

Naoki Tsuchiya
Prodigy 10 points
Part Number: LP5866

Tool/software:

dear T.I.

I have some questions about the output current of the LP5866.

What is the maximum current output from one SW pin of LP5866?

Is it possible to output 550mA from a single SW pin?

  • 0
    TI__Mastermind 20515 points

    Hi Naoki,

    The maximum average current that SW can stand is 322mA. If you use LP5866 as 6-scan line, it means you can set the output current maximum up to about 107mA. But if you use LP5866 as 1-scan line, it means you can only set the output current as 322mA/18 = 17.8mA.

    Please let me know if there is any other problem.

    BR, Jared

  • 0 in reply to Jared Zhou
    Prodigy 10 points

    Thanks Jared

    I have two additional questions.

    When using 5-scan lines, what is the maximum current?

    The configurable output current is [Maximum average current]*[Number of scan lines]/18, so is that correct?

    (Example: When used as 6-scan line, the output current that can be set is 322mA*6/18=107mA)

  • 0 in reply to Naoki Tsuchiya
    TI__Mastermind 20515 points

    Hi Naoki,

    Yes, your calculation is correct!

    The configurable output current is [Maximum average current]*[Number of scan lines]/18, so is that correct?

    So, in 5 scan line, the output current can be maximum up to 322mA*5 scan line/18 channel = 89mA. But the maximum output current of CS is 50mA for LP5866, so please don't worry about the current capability of SW.

    BR, Jared