Low Power Current Consumption in NRF52832

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 11:11:07 GMT

Oh, I’ll give a try on Monday, then definitely will post the results

RE: Low Power Current Consumption in NRF52832

Kenneth — Thu, 11 Jun 2020 11:07:08 GMT

Not sure if I understand, I am wondering if you can measure the current consumption for instance with 2V, 2.5V, 3V, and 3.5V. Is it always 230uA?

Best regards,
Kenneth

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 10:51:04 GMT

Yes, it goes to what it was before turnon the BLE CHIP without changing the state of the host pins.

RE: Low Power Current Consumption in NRF52832

Kenneth — Thu, 11 Jun 2020 10:44:36 GMT

Are you able to change VDD_BLE to check if the current scale/changes?

Kenneth

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 10:26:45 GMT

I checked it, uart pins configured with no pullup and other two pins are outputs. Even I tried to check the current Consumption by removing all code except power management and in for loop ideal_state function which mostly used for enter in the System ON low power but current still same 230uA. Here is the pins attached with chip but I’m just using uart and 31,22,3 pins

RE: Low Power Current Consumption in NRF52832

Kenneth — Thu, 11 Jun 2020 10:16:17 GMT

Is it possible that you have configured pull resistor on any of the other pins (e.g. UART), and one of these pins are now set opposite?

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 09:56:52 GMT

I changed it with pulldown.

RE: Low Power Current Consumption in NRF52832

Kenneth — Thu, 11 Jun 2020 09:53:59 GMT

But the code says: nrf_gpio_cfg_input(31, NRF_GPIO_PIN_PULLUP );?

If it's set low then it will flow I = U/R = 3V/13kohm = 230uA?

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 09:27:47 GMT

Yeah I disabled log everything that I’m not using. But I‘m getting 3.3v at tx pin after deinitialize the uart and uart_close() func set these pins as a default inputs. I tried by configuring these pins as an output and clear these pins but still 230uA.

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 09:19:36 GMT

Its 31 pin configured as an output with pulldown which is control by the host board

RE: Low Power Current Consumption in NRF52832

Kenneth — Thu, 11 Jun 2020 07:47:48 GMT

Which pin is BLE_DEEPSLEEP_PIN_MONITOR?

If BLE_DEEPSLEEP_PIN_MONITOR is pin 31 with internal pull-up that could explain the current.

RE: Low Power Current Consumption in NRF52832

Vojislav — Thu, 11 Jun 2020 07:11:35 GMT

Maybe you need to disable something in sdk_comfig.h file. Maybe disable logs or something else?

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Thu, 11 Jun 2020 04:39:04 GMT

Hi Vojislav,

I tried all of the suggestion but still consuming 230uA. I'm using ble_uart_app. what else need to be de-Init before go to low power.

RE: Low Power Current Consumption in NRF52832

Kenneth — Tue, 09 Jun 2020 12:07:32 GMT

Also check out this thread for some suggestions;
https://devzone.nordicsemi.com/f/nordic-q-a/61455/uarte-power-consumption-after-shutdown

RE: Low Power Current Consumption in NRF52832

Vojislav — Tue, 09 Jun 2020 11:32:12 GMT

It should be, this is how I did it a while ago:
https://devzone.nordicsemi.com/f/nordic-q-a/58745/uart-disable-problem

RE: Low Power Current Consumption in NRF52832

AbdulRehman — Tue, 09 Jun 2020 11:28:51 GMT

Hi Vojislav, thanks for the reply the above current consumption is after detaching the programmer, with programmer its consuming ~700uA. app_uart_close() is not enough to disable the UART?

RE: Low Power Current Consumption in NRF52832

Vojislav — Tue, 09 Jun 2020 07:29:21 GMT

Hi,

Make sure your uart is uninit correctly, and second thing is if you are measuring power consumption remove programming pins, detach programmer, as it adds ~300uA.

Also, I would set BLE_DEEPSLEEP_PIN_MONITOR to the interrupt to be more efficient.

Best regards,
Vojislav.