PCA10001 Power consumption

RE: PCA10001 Power consumption

Nikita — Wed, 27 Aug 2014 14:12:25 GMT

Yes, device is sending reply packets every connection interval (if slave latency = 1) to maintain connection. 20uA in connected state is normal.

RE: PCA10001 Power consumption

Dani — Wed, 27 Aug 2014 14:08:22 GMT

In fact, 20uA is in System-ON, Connected with BLE to master (PCA10000 in Eval-Kit) and going to sleep with 'sd_app_evt_wait()': so, device is only waking up when an event occurs. Internally (in terms of SoftDevice), I guess that device (even sleeping from application point of view) is sending something in order to mantain connection, right? This would explain my 20uA consumption...

RE: PCA10001 Power consumption

Nikita — Wed, 27 Aug 2014 13:57:30 GMT

If you are not advertising or connected, or any peripheral is working and in the main loop you calling sd_app_evt_wait() then in this case it'll be system ON mode with RTC + 32kHz crystal running and current consumption only ION + IRTC + IX32k = 3-4uA.

RE: PCA10001 Power consumption

Stefan Birnir Sverrisson — Wed, 27 Aug 2014 13:50:36 GMT

Are you using the example that I pointed you to? The 20 uA is not explained by 16/32 MHz clock, that current is much higher.

RE: PCA10001 Power consumption

Dani — Wed, 27 Aug 2014 12:13:10 GMT

Furthermore, with module in System ON and going to sleep I get about 20uA power consumption: I guess this is the 16MHz power consumption, right? In system-on, is it possible to decrease power consumption? Because, if I'm working with S110 Softdevice, 16/32MHz crystal is required, right?

Regards,

Dani.

RE: PCA10001 Power consumption

Stefan Birnir Sverrisson — Wed, 27 Aug 2014 12:09:41 GMT

Sorry, my bad. I modified the response to include the link to the example. Good that you have it working already.

RE: PCA10001 Power consumption

Dani — Tue, 26 Aug 2014 14:24:48 GMT

Solved!!! I have erased the device and I have programmed again SoftDevice and the App: now I read about 0.3uA

RE: PCA10001 Power consumption

Dani — Tue, 26 Aug 2014 14:15:28 GMT

Sorry, but, where is this example?

RE: PCA10001 Power consumption

Stefan Birnir Sverrisson — Tue, 26 Aug 2014 13:57:45 GMT

Try the system-on-gpio example provided here. You should measure about 3uA current with this example when you have pressed button 0 in order to enter System On low power mode. To make the KEIL project compatible with the PCA10001 kit, replace the BOARD_NRF6310 constant define in the Keil project to BOARD_PCA10001

Update 27.8.2014: To accurately measure current you need to disconnect the debugger/programmer and any external circuit connected to the GPIO, in order to prevent potential current leak. For the PCA10001 board of the evaluation kit, disconnect the debugger by setting switch SW4 to OFF