Power consumption in sleep mode

RE: Power consumption in sleep mode

Stian Røed Hafskjold — Fri, 08 Jan 2021 11:29:03 GMT

Thanks for the information. Can you try with the ble_app_pwr_profiling application in the SDK. You can flash the precompiled hex file in that folder. It starts out in system OFF mode, which is consuming about 0.5 uA. If you see a higher current there are some other components on the board that consumes current.

So are you measuring on the Fanstel module only, or is it attached to another PCB with other components? Are you sure that you are measuring the current going into the Fanstel module only?

One quick check is to see if you have logging turned off. Go to sdk_config.h and check if NRF_LOG_ENABLED is set to 0. If logging is enabled I would expect to see a few hundred microamps.

Can you try to see if the ADC peripheral is consuming current? Try to stop sampling and disable the peripheral completely. See if that makes any difference.

RE: Power consumption in sleep mode

rajAsthana — Fri, 08 Jan 2021 10:46:52 GMT

Hi,

Please have a look on information provided below

Software

SDK version - nRF5_SDK_17.0.0_9d13099
Based on which example code - ble_app_uart(Peripheral)
Any changes to the original code - ADC and Flash code added
Peripherals used - BLE,SAADC,Flash,app Timer
Hardware

Custom board or DK - DK(Fanstel Board)
Post schematic if possible (N/A)
DK version - EV-BM832A
PCA Number (PAC10040E)

Measurement setup
- Equipment used Digital Multimeter (FLUKE87V)
- Measurement method: SMU
- BOARD SCHEMATIC - SCHEMATIC_BOARD

Thanks

Raj

RE: Power consumption in sleep mode

Stian Røed Hafskjold — Thu, 07 Jan 2021 12:06:04 GMT

Hi, please provide more information about:

Software
- SDK version
- Based on which example code
- Any changes to the original code
- Peripherals used
Hardware
- Custom board or DK
- Post schematic if possible
- DK version and PCA number
Measurement setup
- Equipment used
- Measurement method: Ampere meter, SMU, etc
- Wiring
Plots from measurements showing the high current consumption

Also I would suggest trying the ble_app_pwr_profiling application in the SDK, this starts out in system OFF mode and should give a good indication of measurement errors or other leakage currents on the board.

Thanks