Why is current consumption high on my nRF9160 custom board?

RE: Why is current consumption high on my nRF9160 custom board?

Yusuke — Sat, 27 Jun 2020 02:10:43 GMT

Hi Hakon, I'm struggling with current consumption issue on DK v0.9.0 in nrf v1.3.0

I would appreciate it if you can give me any advice.

https://devzone.nordicsemi.com/f/nordic-q-a/62818/how-to-decrease-power-consumption-in-sleep-at-nrf-v1-3-0-tag

RE: Why is current consumption high on my nRF9160 custom board?

Yusuke — Sat, 09 Nov 2019 11:06:37 GMT

Thanks!

One GPIO was floating and after I pulled down the port the current is 11uA

RE: Why is current consumption high on my nRF9160 custom board?

Håkon Alseth — Fri, 04 Oct 2019 08:11:09 GMT

Hi,

Try disabling serial (CONFIG_SERIAL=n), and configuring your board to be in the secure region "nrf9160_pca10090" (not "ns"), then run a very simple main:

k_sleep(1000);
while(1) k_cpu_idle();

And see if the current consumption is still equal. Now, it should be < 10 uA, but if it is higher; it is most likely related to floating GPIOs. Make sure that each GPIO has a defined state in sleep, especially those where the level enables external ICs, like "WIFI_EN", "USART_RX_WIFI", and other signals that are controlled by the nRF.

Kind regards,

Håkon