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BLE continuosly consuming Power even after I disconnect it.

Hi,

I am working on NRF52 custom board with 3.7mA 27mAH battery, working on BLE app UART example SDK11 with SoftdeviceS132V2.0.

I made BLE advertise for 20 sec interval on button action, if I observe current across the Battery it is continuously showing 29mA. Once I connect the device with NRF Tool box app through BLE the current across the Battery increases to 35mA. After disconnecting the current reading is still 35mA and not dropping back to 29mA.

Could you please suggest me what to do so that the current drops back to 29mA.

Thank you in advance.

Parents
  • It sounds like you have some sort of short circuit somewhere. The nRF52 should definitely not draw 29mA alone. The extra 6mA when you transmit or actually use the nRF52 might make sense though, and maybe the CPU fails to enter sleep mode again after the connection and continues to draw extra current.

    1. Can you upload your schematic and PCB layout?
    2. Do you have other components on your board?
Reply
  • It sounds like you have some sort of short circuit somewhere. The nRF52 should definitely not draw 29mA alone. The extra 6mA when you transmit or actually use the nRF52 might make sense though, and maybe the CPU fails to enter sleep mode again after the connection and continues to draw extra current.

    1. Can you upload your schematic and PCB layout?
    2. Do you have other components on your board?
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