Current Measurement verification using Power Profiler Kit 2

RE: Current Measurement verification using Power Profiler Kit 2

Stian Røed Hafskjold — Tue, 15 Feb 2022 12:02:14 GMT

VDD on P13 is not part of the current that goes to VDD_nRF, so it will not be measured when measuring the current through P22.

If you want to connect two wires to the the VDD_nRF pin on P20, you will have to be creative. Split the wire, use a breadboard, solder the wires on the header, use crocodile clips, etc. There are many possibilities.

RE: Current Measurement verification using Power Profiler Kit 2

Ridhi — Tue, 15 Feb 2022 11:38:31 GMT

1). if i have sensors connected to VDD on P13 will it be ok or is it mandatory to connect them on P20

2). how will i connect 2 sensors i nrf52832 board P20 as in that only one vdd is there

RE: Current Measurement verification using Power Profiler Kit 2

Stian Røed Hafskjold — Tue, 15 Feb 2022 10:36:22 GMT

Yes, you can measure the current through P22. But to add the current for the sensors, they will have to be powered from VDD_nRF (on P20), so connect all VDD pins on the sensors to the VDD_nRF on P20, and the PPK will measure the current for both the nRF52 and the sensors on P22.

RE: Current Measurement verification using Power Profiler Kit 2

Ridhi — Tue, 15 Feb 2022 05:17:13 GMT

Winbond W25Q16JV Serial Flash Memory:

sck pin 28

miso piN 29

mosi pin 30

cs pin 31

vdd pin wp

gnd pin gnd

STTS751:

adress pin vdd

vdd

gnd

sda pin 24

scl pin 23

power the dev kit with coin cell

PPK kit powered by usb and

cut SB9 on nrf52832 measuring from P22

So, in this case how will i get total current measurement for sensors, and nrf52

RE: Current Measurement verification using Power Profiler Kit 2

Stian Røed Hafskjold — Tue, 14 Dec 2021 13:57:20 GMT

Hi,

There are two main power domains on the nRF52 DK:

VDD
VDD_nRF

The current that goes through the P22 header is the VDD_nRF power domain, meaning that you will only measure the current that goes to the nRF52.

The VDD domain on the DK powers the JLink debugger chip, LEDs, buttons etc. Everything on the DK except the nRF52. VDD can be powered from P21, or USB, or using a coin cell.

If the sensors you are connecting are powered from one of the pins on the DK labeled VDD, the sensors will be powered from the VDD domain. Hence, you will not measure the current for those sensors through the P22 header. In this case you have two options:

Measure the current to nRF52 only through P22
Measure the current for everything. nRF52, sensors, DK, debugger, etc, by powering and measuring the current that goes into P21.

Alternatively, you can power the sensors from the VDD_nRF domain. Then you will measure the current going to both the sensors and the nRF52 on P22, but not the rest of the DK. If you want to do this you can power the sensor on the VDD_nRF pin on the P20 header.

RE: Current Measurement verification using Power Profiler Kit 2

Ridhi — Mon, 06 Dec 2021 06:58:20 GMT

a) Would you like to measure the SoC + the sensors +leds which blink on dev kit when any event occurs

yes

b) Or would you like to measure only the sensors?

yes

Winbond W25Q16JV Serial Flash Memory:

sck pin 28

miso pi 29

mosi pin 30

cs pin 31

vdd pin wp

gnd pin gnd

STTS751:

adress pin vdd

vdd

gnd

sda pin 24

scl pin 23

power the dev kit with coin cell

PPK kit powered by usb and

cut SB9 on nrf52832 measuring from P22

how will i get to know the total current consumed by dev kit+ sensors+ advertising leds?

how will i get to know the total current consumed by each sensor?

RE: Current Measurement verification using Power Profiler Kit 2

helsing — Fri, 03 Dec 2021 15:02:20 GMT

Hi Ridhima,

[quote user=""]Case 3: how to measure current of SoC and sensors interfaced alone [/quote]

What are you trying to measure?

a) Would you like to measure the SoC + the sensors?

b) Or would you like to measure only the sensors?

c) Or are you trying to measure the SoC but not the sensors?

Would you be able to create a diagram or a table showing the connections? It is easy to make a mistake when decoding the connections from the image.

RE: Current Measurement verification using Power Profiler Kit 2

Ridhi — Thu, 02 Dec 2021 05:30:17 GMT

i have connected nrf52832 with coin cell and connected flash and temperature with nrf52832 board vdd and i2c for temperature sensor and spi for flash

RE: Current Measurement verification using Power Profiler Kit 2

helsing — Wed, 01 Dec 2021 13:58:55 GMT

Hi Ridhima,

Please see the documentation on how to measure current on the nRF52832:

https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_meas_current.html

PPK II user guide:

https://infocenter.nordicsemi.com/topic/ug_ppk2/UG/ppk/PPK_user_guide_Intro.html

Case 1 and 2:

[quote user=""]Using nrf52832, solder bridge cut[/quote]

Which solder bridge are you referring to? Assuming you are referring to cutting SB9, next to P22: Measuring at P22 will let you measure the current drawn by nRF52832. Measuring at P21 will let you measure the current drawn by the whole DK.

Case 3:

How are your sensors powered?

Best regards,

Håkon

RE: Current Measurement verification using Power Profiler Kit 2

Ridhi — Wed, 01 Dec 2021 12:20:53 GMT

Karl Ylvisaker pls look into it