BC66 VDD_EXT voltage stay high when the module has already sent "ENTER PSM" message

ivanov_sv · December 15, 2021, 7:47am

Hi guys! I need your help.
I have BC66NA module working in PSM. FW revision is BC66NADAR02A01. I need minimal current consumption.
Now I have this current consumption profile:

My question is: why does the VDD_EXT voltage stay high when the module has already sent “ENTER PSM” message? The module consumption at this time is about 6 mA.

herbert.pan-Q · December 15, 2021, 8:22am

hi,ivanov_sv
Are you testing standalone modules or testing your complete equipment?

ivanov_sv · December 15, 2021, 8:29am

Hi Herbert! Yes, this current consumption profile for whole PCB (NRF52832 MCU). But current for NRF52832 is only 25uA, I have tested it. There are MCU and BC66 on the PCB

ivanov_sv · December 15, 2021, 8:30am

I check VDD_EXT voltage by oscilloscope, and I have the same picture.

herbert.pan-Q · December 15, 2021, 8:41am

hi,ivanov_sv
Please upload a picture of your entire device.

ivanov_sv · December 15, 2021, 8:48am

herbert.pan-Q · December 15, 2021, 8:53am

hi,ivanov_sv
The modules and the reference power we provide are fully tested,It is not accurate to subtract the POWER consumption of MCU from the power consumption of your test. The reference power consumption we provide is only the power consumption of individual modules. If your environment allows it, please verify the power consumption of individual modules.

ivanov_sv · December 15, 2021, 9:04am

Hi Herbert! Yes, I will double check standalone power consumption of BC66 (need some time). Do you have any documents with time diagrams of VDD_EXT voltage behavior at PSM?

herbert.pan-Q · December 15, 2021, 10:11am

Quectel_BC66_Hardware_Design_V1.3.pdf (1.0 MB)