Higher current consumption when bucken gpio is activated on nrf7002DK

RE: Higher current consumption when bucken gpio is activated on nrf7002DK

Kenneth — Thu, 06 Jul 2023 13:35:11 GMT

The reference circuitry should show what you need:
https://infocenter.nordicsemi.com/topic/ps_nrf7002/chapters/hw_layout/doc/hw_layout.html#unique_1799575672

https://infocenter.nordicsemi.com/topic/ps_nrf5340/chapters/ref_circuitry.html

Kenneth

RE: Higher current consumption when bucken gpio is activated on nrf7002DK

Seb-labs — Thu, 06 Jul 2023 12:36:54 GMT

I took a look at schematics of 7200DK, and I found a pull down (R4) on bucken at 100kΩ, and 3 on ios at R36, R37 and R59. The consumption may come from those.

Are those pull down really neaded? Can we on our final board chose higher values?

RE: Higher current consumption when bucken gpio is activated on nrf7002DK

Kenneth — Thu, 06 Jul 2023 12:17:16 GMT

Hello,

We will see if we can take a look at it, but basically, one measurement header is for measuring VBAT, and the other one is for IOVDD of nRF7002. If the solder bridge is soldered to measure nRF5340 as well, then the current is measured for both nRF5340 and IOVDD. In other words, you can't measure only nRF5340.

Kenneth