high current consumption of nrf 5340 with 7002

[allenyang]

I'm using the custom board of nrf 5340 with 7002.

When I run the sample project of Hello World, the current is about 90 ma,

and I run the sample project of WI-FI Scan, the current is about 50ma when its scanning, and 2ma in the idle state. 

 I've tried to disable all the gpio ,spi and  I2C pin in device tree, and it's still the same high current.

Does it have any way for reducing the current?

[Kazi Afroza Sultana]

Hello,

You are getting very high current. How have you measured the current? how does the project config file look like?

[allenyang]

#config RTT
CONFIG_LOG=y
CONFIG_LOG_PRINTK=y
# CONFIG_LOG_MODE_DEFERRED=y
CONFIG_UART_CONSOLE=n
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n

CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=4096
CONFIG_LOG_BUFFER_SIZE=4096

# Disable internal DCDC
CONFIG_BOARD_ENABLE_DCDC_APP=n
CONFIG_BOARD_ENABLE_DCDC_NET=n
CONFIG_BOARD_ENABLE_DCDC_HV=n

# Use internal capacitor for 32M xtal and set capacitor value to 8.5pF 
# (ranging from 7.0 pF to 20.0 pF in 0.5 pF steps
# can be enabled on pins XC1 and XC2. This option specifies doubled
# capacitance value for the two capacitors. Set it to 14 to get 7.0 pF
# for each capacitor, 15 to get 7.5 pF, and so on.
# )
CONFIG_SOC_HFXO_CAP_INTERNAL=y
CONFIG_SOC_HFXO_CAP_INT_VALUE_X2=17
 
#  Use internal capacitor for 32k xtal and set capacitor value to 7pF 
# (only 4 options of internal capacitor value settings for 32k xtal
#   -INT_6PF
#   -INT_7PF
#   -INT_9PF
#   - USE external capacitor)
CONFIG_SOC_ENABLE_LFXO=y
CONFIG_SOC_LFXO_CAP_INT_7PF=y

Hi, I only added the RTT config and disabled dcdc.

[allenyang]

Hi, can it cause by power management ?  

Because I didn't add any of it .

And I want to know what the normal current will be when hello world sample is running using nrf5340 with 7002, and when it is in the idle state ?

thanks