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Current measurements on nrf52840 pdk with PPK

nahro

ble_app_gls_pca10056_s140.hex

Hi, I am new in this field and i am trying to do current measurement on the nrf52840 PDK using PPK, in sleep mode(sd_power_system_off) i get average 40 micro amp which suppose to be 0,6! while in advertising mode the average is 700 micro amp. I followed this to prepare the PDK for current measurement and this for PPK configration. am i doing it wrong? I am using ble_app_gls example with soft device s140

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    Yes, logging enabled will increase the current consumption in system ON idle mode (between the BLE advertising events) because the UART peripheral is powered on. In system OFF mode logging will not have an impact on current consumption.

    I tried with Bjørn's hardware now, and I also got 40µA. The reason for this is that SB41 is not cut, and the chip is powered through the high voltage pins, which in combination with the PPK gives wierd results.

    Try to cut SB41 (in addition to SB40) and see if that helps. I can not find this documented in either the PKK or PDK user guide, which is not good, so we're sorry for wasting your time.

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    Yes, logging enabled will increase the current consumption in system ON idle mode (between the BLE advertising events) because the UART peripheral is powered on. In system OFF mode logging will not have an impact on current consumption.

    I tried with Bjørn's hardware now, and I also got 40µA. The reason for this is that SB41 is not cut, and the chip is powered through the high voltage pins, which in combination with the PPK gives wierd results.

    Try to cut SB41 (in addition to SB40) and see if that helps. I can not find this documented in either the PKK or PDK user guide, which is not good, so we're sorry for wasting your time.

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