RE: nRF52832 High Power consumption on custom design?

SamB — Sat, 27 Jul 2019 05:05:02 GMT

Thanks for reply.

We are measuring the current consumption of the custom board which includes the NRf52832 and all 3 sensors on PCB. But what about the Max current consumption around 15-20mA as we are observing in PPK.

The function of our device is such that nRf52 receives data from all sensors and sends it out over BLE UART service continuously.

Request you to guide us for to lower the current consumption.

RE: nRF52832 High Power consumption on custom design?

haakonsh — Tue, 23 Jul 2019 09:01:46 GMT

Are you measuring the current consumption of the PCA10040DK or a custom board?

The first thing I do when I want to measure the current of a faulty device with an nRF52 and multiple peripheral sensors or other circuitry is to isolate the power supply of the nRF52 from the power supply of the rest of the circuit. That way I can measure the current consumption of the nRF52 while the device is operating as intended and compare it to the total current consumption. This will tell me whether the abnormal current consumption is present in the nRF52, the rest of the device, or both.

Isolating the erroneous current consumption is key in finding the root cause. If the current consumption of the nRF52 is not at fault, or not entirely at fault, I would continue isolating the power supply of the sensor's, one-by-one, followed by other circuitry until you find something interresting.