Including battery USB charging on the nrf52840

RE: Including battery USB charging on the nrf52840

Hieu — Tue, 29 Apr 2025 14:03:05 GMT

I'm just doing my job. I will close this ticket then. Please feel free to reopen it if you have any further questions.

RE: Including battery USB charging on the nrf52840

A.P — Tue, 29 Apr 2025 06:43:00 GMT

Thank you Heiu!
I've looked at some of Nordic's PM chips, but they are outputting a lower A than we target. I'll keep an eye out for any new product.

Regarding my question, this ticket, dealing with the D- & D+ lines on a USBC receptacle actually answers it.
Thank you for your input!

RE: Including battery USB charging on the nrf52840

Hieu — Fri, 25 Apr 2025 10:03:51 GMT

P.s: The nPM1300 is used in the Thingy:91 X. In this product, one USB port is used for both charging the battery and communicating with the nRF9160. Therefore, it works well as a reference design.

Note that the nPM1300 is also capable of monitoring battery charge level as well. Overall, it seems like a suitable fit for your requirement.

RE: Including battery USB charging on the nrf52840

Hieu — Thu, 24 Apr 2025 13:26:39 GMT

Hi A.P,

[quote user="A.P"]My question is then- do the nRF52840 and nRF52833 perform these actions when a USB2 is connected to them?[/quote]

The nRF52840 detects USB connected using VBUS only, purely analog. However, once connected, USB communication can start or not depends on the application software. Most often, this means some communication on the D- and D+ lines.

Is that what you are asking about?

[quote user="A.P"]If not, and I understand this is not entirely a Nordic question, what is usually done to support these? does adding an external BMS like the Monolithic Power module I mentioned above and connecting the data lines to it solve this? if yes, how are the data lines shared between the IC and a BMS then?[/quote]

There has to be a USB hub to route data from the host to the correct chip.

On the occasion, may I recommend you take a look at our Power Management chip? The nRF1300, for example, is compliant with USB Type-C, is designed to work well with the nRF52840 and nRF52833 USB, and supports battery charging.

RE: Including battery USB charging on the nrf52840

A.P — Wed, 23 Apr 2025 06:34:22 GMT

Hi Hieu!
I apologize, I tried to give as much data as I could and muddied my question.
I'm specifically asking about USB2 BC 1.2 capabilities as outlined in this document, for example.

As I understand it, the portable device uses the D+ and D- lines to perform some detection scheme when VBUS is detected to determine what type of Port it is connected to.
Different port types will supply different currents- SPD 500mA, DCP 1.5A, CDP 1.5A, DCP/CDP 1.5A.

Again, I may be wrong here, but it seems like the portable device must perform some action on the D- and D+ lines to be able to enumerate.

My question is then- do the nRF52840 and nRF52833 perform these actions when a USB2 is connected to them?
If not, and I understand this is not entirely a Nordic question, what is usually done to support these? does adding an external BMS like the Monolithic Power module I mentioned above and connecting the data lines to it solve this? if yes, how are the data lines shared between the IC and a BMS then?

Thanks

RE: Including battery USB charging on the nrf52840

Hieu — Tue, 22 Apr 2025 19:49:34 GMT

Hi A.P,

I am afraid you have to ask Monolithic Power about their product. From our end, we can only agree that USB-PD doesn't require D+ and D- lines to work. However, the Monolithic Power chip might be doing something else with it.

If I misunderstood something, please let me know.

I will also relay your use-case to our teams.

Hieu