My sleep current is 20 micro Amps, How will I decrease to less consumption?

[Santosh Tangudu]

I am using power_manage function to keep low power sleep mode. And I used below peripherals in code,

1. SPI master, SPI master is disabling when ever I am not using.
2. Timer given in the example codes, i.e RTC1 timer and it will give 1 second timer interrupt.
3. BLE connection mode. It will advertise connection packet for every 1 second.
4. All unused GPIO pins configured as Output with pull down enabled, I tried all other ways this is the best I get in sense of less power consumption.

Based on these inputs can you please suggest, what is the reason of 20 micro Amps power consumption when CPU is in sleep?

[Bjørn Kvaale]

I would take a look at this great devzone post on how to reduce current consumption. Even though it is written for the nrf51, a lot of it still applies to the nrf52 series.

[Santosh Tangudu]

Hi Bjorn,

Thanks for the reply.

I already look into that same post. And I checked all the things what ever mentioned in that post ,we already considered those things. still it's consuming 20 micro Amps.

[Bjørn Kvaale]

How are you measuring the current? Have you checked the online PPK to see what your current should be roughly given your use case?

[Santosh Tangudu]

We are using power tool to measure the current. I not checked with the online PPK.

[Bjørn Kvaale]

I could recommend that you check the errata list for the nrf52. There are some issues with the timer for example that can lead to high current (see link). Might be something that you could check there. This case might also be helpful.