How to read Power Profiler Kit Measurements

RE: How to read Power Profiler Kit Measurements

Hung Bui — Thu, 27 Apr 2017 12:56:24 GMT

Have you tried with very simple code ? Just simply put the CPU to sleep , to see if the PPK can measure current correctly ? Regarding AVG and RMS if you are looking for the average current consumption, you should use AVG. I heard from the developer, RMS is provided to measure noise characteristic.

RE: How to read Power Profiler Kit Measurements

peter237 — Thu, 27 Apr 2017 12:44:15 GMT

Sorry, I used the "DUT select: External" of course.

The HFCLK is not running, I tested the same code on the DK and on the external board. I tested a simple Advertising Example as well and with that board, there is a constant draw of 0.8mA. Maybe there is something wrong with the DC/DC converter, I have to check that. Do you have a sample PCB layout for a Beacon with 4AA batteries?

Could you help me with the RMS / AVG question as well?

Thanks

RE: How to read Power Profiler Kit Measurements

Hung Bui — Tue, 25 Apr 2017 12:46:30 GMT

Hi Peter,

Could you show us how you connect your DUT to the Power profiling kit and the power source for it ? Are you using the DK for testing ? If now why did you set DUT Select to DK ?

Constant 0.8mA could be due to the HFCLK running. Have you tried a simple example for example CPU sleep most of the time and only wake up for RTC event ? Just to make sure you can see constant low current when the CPU sleeping ?

Note that you should only supply maximum 3.6 V to the external supply port or 5.5V to USB supply.