nrf52840 usb mode and battery mode

RE: nrf52840 usb mode and battery mode

Kazi Afroza Sultana — Thu, 28 Dec 2023 13:49:17 GMT

Hello,

I think our npm1300 can support this. However to make sure could you please talk to your local RSM?

RE: nrf52840 usb mode and battery mode

bibiblcbrd — Wed, 20 Dec 2023 16:31:26 GMT

HI, I'm an nRF52840 newbie here. Has anyone ever designed a PM circuit powered by a single lipo battery or USB Micro B with two Vouts (5V and 3.3V)? The design I'm currently working on is to boost/regulate either the lipo battery or the VUSB to 5V and then regulate it to 3.3V. Is there a recommended PMIC that's under $5 for this? I've been searching for a while now. Thanks.

RE: nrf52840 usb mode and battery mode

Kazi Afroza Sultana — Mon, 09 May 2022 18:25:14 GMT

In Thingy 52, to provide the circuits with a stable voltage, a DC/DC buck regulator with an output of 3.3 V is used.

RE: nrf52840 usb mode and battery mode

Davides98 — Fri, 06 May 2022 13:12:51 GMT

okay so VCC and VDDH connected together and managed by the 3.3V regulator?

RE: nrf52840 usb mode and battery mode

Kazi Afroza Sultana — Thu, 05 May 2022 13:17:24 GMT

Hello,

I think what you have mentioned here it would possible to implement. We have thingy:52 , that almost does the same thing. You can see the following block diagram. USB and battery two ways are here for power supply and mosfets act as switches.

Here is the product specification of thingy:91 https://infocenter.nordicsemi.com/topic/ug_thingy52/UG/thingy52/intro/frontpage.html?cp=14_2 , you can look at for getting the brief idea.

Thanks.

Best Regards,

Kazi Afroza Sultana

RE: nrf52840 usb mode and battery mode

Kazi Afroza Sultana — Thu, 05 May 2022 05:34:35 GMT

Hello David,

I have been looking at your design. I will get back to you soon.

Thanks.

Best Regards,

Kazi Afroza Sultana