nPM1300-EK No response from PMIC

RE: nPM1300-EK No response from PMIC

Robin M Saltnes — Wed, 16 Aug 2023 12:27:56 GMT

Hi Rob, I allow myself to weigh in on this.

First let me just clarify: this behaviour is not an error and not subject to any errata.

The nPM Controller USB is the data and power-connection for the board controller IC only. The data-USB to the controller can not provide the nPM1300 with power, as many data-connections are current limited, like for example a USB type-A port on a PC. Likewise the nPM1300 can not power the board controller as this would reduce the amount of current available to external components.

The PMIC USB is a power-only connection, such that all current provided to the nPM1300 is available for external components. This can be even powered by a simple USB-C power supply.

This is by design, as this is a development tool meant to evaluate the performance of the nPM1300 PMIC, which gives you the possibility to monitor the current draw from the nPM1300, plus any batteries and external components you would have added. For any "normal" device you would of course power the board controller from the PMIC and use the same USB-port for any data connections.

Best regards
Robin

RE: nPM1300-EK No response from PMIC

robsrick — Tue, 15 Aug 2023 07:48:52 GMT

Hi Swathy

it was because I didn't have USB-C cables connected to both ports so that the PMIC was powered. Weird because before the firmware update I had used it with one USB C in the nPM controller port and it seemed to work fine. did something change?

RE: nPM1300-EK No response from PMIC

SwRa — Wed, 09 Aug 2023 08:40:51 GMT

Hi Rob,

Just heard from the experts in nPM that this can be due to an errata on the nPM1300 used on the initial build of EK's. This errata will be fixed in the TTP version of nPM1300 available in October 2023. In the meantime, you will need to do the connection as described in step 4.1 in the getting started guide: https://www.nordicsemi.com/Products/Development-hardware/nPM1300-EK/Get-started?lang=en#infotabs

Best Regards,

Swathy

RE: nPM1300-EK No response from PMIC

SwRa — Mon, 07 Aug 2023 13:19:40 GMT

Hi Rob,

Sorry for the delay.. We were a bit short staffed owing to the vacation season here. Could you tell me if the LED on it is toggling on/off.? Could you try pressing SW1.? Could you also check if the PMIC has power.?

Regards,

Swathy

RE: nPM1300-EK No response from PMIC

robsrick — Thu, 03 Aug 2023 09:13:57 GMT

hey Swathy, any update on this?

RE: nPM1300-EK No response from PMIC

SwRa — Fri, 28 Jul 2023 13:49:46 GMT

Hi Rob,

Letting you know that I have been assigned this case and will get back to you shortly.

Regards,

Swathy