What is the recommended circuit to stop the output in nPM1100/nPM1300?

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

Yoshihiro Goto — Thu, 12 Oct 2023 06:24:03 GMT

Hi,

Thingy53's schematic is very informative and seems to have answered my question.

Thank you very much.

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

Robin M Saltnes — Tue, 10 Oct 2023 15:06:47 GMT

Entering ship mode would disable any ongoing charging, connecting to a USB power source to charge would force the PMIC to exit ship mode and not reenter it when the power source is disconnected.

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

Robin M Saltnes — Tue, 10 Oct 2023 15:04:19 GMT

Hi,

The Thingy:53 uses an nPM1100 as its charger and is a reference design for this, here the switch is placed on the outputs of the nPM1100.

The power consumption of the PMIC in this state is 800 nanoA, according to the PS. Or to give an example, at this rate it would take about 520 days for the PMIC to reduce your battery's charge by 10 mAh.

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

PaKa — Tue, 10 Oct 2023 10:44:07 GMT

Suggest to also read about the ship mode of the nPM1100/1300, may be what you are looking for.

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

Priyanka — Tue, 10 Oct 2023 09:12:34 GMT

Hi,

Please take a look at the BUCK regulator section in the Product specification. It should be possible to disable the supply when the battery is charging. Hope this is what you are looking for. You can also refer to the GPIO control.

Regards,

Priyanka

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

Yoshihiro Goto — Mon, 02 Oct 2023 00:16:18 GMT

Hi,

[quote userid="107729" url="~/f/nordic-q-a/104207/what-is-the-recommended-circuit-to-stop-the-output-in-npm1100-npm1300/448328"]Could you tell me why you wish to achieve this? Do you wish to reduce the current? [/quote]

Yes.

If the DC/DC converter is running, does that mean that the switching is always running? Or does it automatically stop if it is disconnected by a physical switch?

RE: What is the recommended circuit to stop the output in nPM1100/nPM1300?

Priyanka — Fri, 29 Sep 2023 11:20:15 GMT

Hi,

Could you tell me why you wish to achieve this? Do you wish to reduce the current?

Regards,

Priyanka