nRF52805-Power consumption decreases with the addition of a 10uF capacitor

HI  all,

  I've found that adding a 10uF capacitor to the 52805 beacon reduces the power consumption, especially after speeding up the broadcast interval (100ms broadcast interval).

 The conclusion is that the reason for the high power consumption without capacitors is the high total power consumption during broadcast (average current of one transmit wave peak * peak duration)

 btw, beacon with chip and peripherals only,the firmware is Nordic official routine, it can broadcast only, 100ms, 4dBm.

 We also tested the 52810 beacon and found the same phenomenon, but we don't have a more accurate power consumption test instrument, I'm not quite sure if it's the addition of this capacitor that reduces the power consumption, or if the power consumption board (PPK2) can't measure it.

Nordic 52805 beacon带不带10uF电容功耗对比测试.xlsx

Parents Reply
  • HI! There is no difference in average power consumption when adjusting PPK2 sample rate.Also I've found that when I cover the pcba's antenna with an object (whether it's metal or not), the power consumption increases.I would like to know if the transmitter side of the chip regulates the transmit power when the antenna reflection loss is high, and if this is the reason for this increase in power consumption.

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