Where/How to find useful power/current consumption documentation?

[Andy]

Hello,

I'm trying to do some power optimization in my project and I'm looking for information about current consumption of different peripherals. Unfortunately, the information I find is all over the place.

For example, if I wanted to check the power consumption of the UART peripheral I would go to the NRF52832 Product Specification and check the Electrical Specification of the UART peripheral. There I see that the run current @ 115200 bps is 55 uA. However, by looking at different threads here in the DevZone I see that the current consumption depends on many more factors other than baud rate, e.g. usage of flow control, EasyDMA, etc.

The current consumption of the UART peripheral, for what I can tell by reading these threads, is on the order of mA, not uA.

As I have power consumption questions about several peripherals, I ask about how to find out the information myself, rather than asking the questions specifically.

For example, I want to check the power consumption of the PWM peripheral. How would I go about that?

Thanks for your help!

[frankie_pham]

hi Andy,

About Nordic's document, you can find all here.

Your question about power current consumption, I found that in Nordic there is a keyword "power profile". There is a online power profiler here. I see that this power profiler only supports for radio power.

in my opinion, power consumption of a particular peripheral depends on many factors. Your GPIO output pin drives 1KOhm resistor is different from driving 500Ohm resistor about current consumption! So, it's hard to make sure that how much power a peripheral uses.  2 chapters in Product Specification are "power and clock management" and "power" may help you.

Best Regards!

Frankie

[Andy]

Hi Frankie,

Thanks for the link to the power profiler! I didn't know it. I know where to find the product specifications, but as I said I'm failing to find useful information there. I already checked those power chapters with no luck.