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LM27313: Question about controlling the current source by user.

Kyungmo Koo
Prodigy 30 points
Part Number: LM27313

Hello, Forum

Am I able to control the current value from the current source in the LM27313 ? If so, how?

I want to make it clear because there are some different constant values in the DATA Sheet, such as 5.5uA or 3uA as minimum.

I will be thankful, if I could get a clear answer.

Regards,

  • 0
    TI__Genius 12130 points

    Hi Kyungmo,

    Not sure whether I'm getting your point correctly.

    During the device working the maximum input current from the power source will be controlled by the switching current limit, although not directly.

    Could you point out where the 5.5uA or 3uA is in the datasheet?

    Regards

    Lei

  • 0 in reply to Lei Zhong
    Prodigy 30 points

    Hi Zhong,

    When you see the figure 23. of the DataSheet, there is a 'current source' which is making current like 5.5uA. 

    And, at 8.2.2.4, there is a sentence like "I_CL_ADJ is 3uA minimum".

    So, my question is...

    Can I manage the current value coming from the current course? If so, how does a user change it manually?

    If not, what can change the current value coming from the current source?

    Regards,

    Kyungmo

  • 0 in reply to Kyungmo Koo
    TI__Genius 12130 points

    Hi Kyungmo,

    Is the device you are checking LM27313 with literature# SNVS487E?

    There is no figure 23 and part 8.2.2.4 in this datasheet.

    Regards

    Lei

  • 0 in reply to Lei Zhong
    Prodigy 30 points

    Hi,

    Oh, it was my mistake... I put the wrong component here. It should be LM3489Q, not LM27313.

    Check it again, and change the component number, please.

    Thanks!

    Regards,

    Kyungmo

  • +1 in reply to Kyungmo Koo
    TI__Genius 12130 points

    Hi Kyungmo,

    LM3489Q is supported by other product line. For a quick response, I suggest to close this thread and then submit a new E2E thread with the right component number. The new thread will be automatically assigned to the right person based on the correct component number. Thank you.

    Regards

    Lei