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CC2650 Current consumption

YSR1991
Intellectual 420 points
Other Parts Discussed in Thread: CC2650

Hi,

I am using CC2650, in sleep mode it is giving current of 300uA it is very huge as compared 1uA. 

what I need to modify in program. 

Please help.

  • 0
    Guru 735695 points
    Check if there's IO pins are leaking current.
  • 0 in reply to YiKai Chen
    Intellectual 420 points

    Thanks YiKai Chen .. 

    Can you please share details about check/ measuring IO leakage current?

    Thank you very much for your response.

  • 0
    TI__Guru* 83011 points
    Hi Sharad,

    The I/O pins are set in the board file, so you should have a look at that.

    PS, have you seen this document on Measuring Bluetooth Smart Power Consumption www.ti.com/.../swra478a.pdf ?
  • 0 in reply to Marie H
    Intellectual 420 points
    Hi Marie H
    Thanks for suggestion,

    I have gone through swra478a document for measuring power consumption.

    Now new problem occurred, on only one board (custom board for Tag) I have achieved standby current of 2uA and on all other boards current consumption is nearly 1.5mA (huge). Same code used on all boards.

    I have checked/compared boards but all tracks are same components are same.

    One more thing, when i was checking voltage of the JTAG pins (TMS and TCK) and DCDC_SW, the OK board (i.e. with 2uA current) stops working and need to reprogram. This is not happening with other boards.
    I am wondering about this problem.
    Pl help.

    Thank you very much.

    Sharad Yadav1
  • 0 in reply to YSR1991
    Guru 735695 points
    1. It sounds that the problem is on HW not SW. I suggest you to find some HW experts to help you checking this issue.
    2. Do you measure power consumption and checking voltage while you connect it with debugger?
  • 0 in reply to YiKai Chen
    Intellectual 420 points
    Thanks YiKai Chen,

    I have disconnected debugger and checked voltages with battery power.
    I will check this issue with HW expert.
    Thank you very much.

    Regards,
    Sharad Yadav1
  • 0 in reply to YiKai Chen
    Intellectual 420 points
    Hii,

    I have checked Hardware on my own, there was problem with external 32.768kHz crystal, it was dry soldered on one board, i re-soldered that and tested for current, it was showing 280-300uA. Then after checking pin status, two pins which are connected to external Pull ups (10k), were configured as LOW, and that was causing Leakage current through. After making those pns HIGH, Current came to less than 5uA.
    Now my all boards are in (nearly) True standby mode i.e. got expected current value in standby mode.

    Thanks Yikai Chen and Marie H for your valuable suggestions.
  • 0 in reply to YSR1991
    Guru 735695 points
    You are welcome and it's good to know your get satisfied result.