nRF52840 VBUS state when on battery power

[ilia]

Hello,

I have custom board with nRF52840. Most of the time It works on USB power, but it also has a battery. It has some peripherals that powered via USB too (LED w2812b array). When USB is disconnected I want it to go to power save mode, so I need to shut down LEDs. I can do it via LED control pin. But I see that on the LED power pin I still have 2.5V (maybe battery is not fresh).

Is it possible that battery current goes through VBUS into USB circuit?

[Stian Røed Hafskjold]

Can you please post the schematics? To which pins have you connected the battery and the USB power? Thanks

[ilia]

Here is the power supply part. LEDs are connected to the 5v line