Power consumption on custom nRF52832

[Swapnil]

Hello,

I have constructed a custom board with nRF52832 and MPU9250 on it. I have flashed the program for reading battery service, temperature service and MPU9250 readings with enabling bluetooth on my moblie. Later on I measured the current consumption of custom board using multimeter and it is showing as 18mA with 2.8V of power supply. This is the huge current consumption than expected, I think. Currently I am not able to suspect what is causing for this much of current consumption. whether the current consumption parameters which are given in product specification of nRF52832 are for just nRF52832 chip or it is for entire nRF52832 development board ? Could you please suggest what components would be causing this much of power consumption, and what should be done in order to lower this power consumption ?

[Andrei]

Hello!What components are you using in your custom PCB? The problem can be in dcdc, or in another components.....In my case I use dcdc that in standard mode with small current has low efficiency.Its current is around 10mA on low current load....

[Swapnil]

I used the components as mentioned and recommended in nRF52832 hardware design for building custom board. Like Oscillator with capacitors, coupling capacitor, inductors for antenna and DCDC configuration, LED with series resistor and pull up resistor for MPU. I am currently using default LDO regulator.

[Andrei]

So you don't use anything now in custom PCB? Only reference layout and rf antenna?No external dcdc or ldo?

[Swapnil]

I am not using any external DCDC or LDO. Just reference design with MPU9250 connected

[Andrei]

MPU consumption is 6mA?