nPM1300 hardware options for solar charging

RE: nPM1300 hardware options for solar charging

ChrisRu — Mon, 28 Apr 2025 07:06:02 GMT

Hi,

I have an evaluation done too with a Solar-panel and a 1000mAH LiPo using a customized board.
Pitfall 1:
When the Sun is bright the floating voltage rose over the cut off Voltage and the nPM1300 protection hits
Pitfall 2:
When charging the current-microamp = <100000>; must set below the threshold where voltage drops below the 4.4V

Pitfall 1 solution. We add a diode in the power path which cuts 0.7V from the floating voltage (e.g. 5.6V(float) - 0.7 = 4.9V) not trigger the protection.

With this config we was able to have good charging setup.

Green, is the nPM1300 Blue, conventional solar charging module always charging.

Hope that helps.

Chris

RE: nPM1300 hardware options for solar charging

Michal — Mon, 20 Jan 2025 16:04:25 GMT

Hello again,

Solar charging is unsupported in nPM1300 directly, since that would require maximum power point tracking etc.

Best regards,

Michal

RE: nPM1300 hardware options for solar charging

Michal — Sun, 12 Jan 2025 22:12:53 GMT

Just wanted to let you know that I am back and I will hopefully have some more information in the following days.

Though I'm worried that it is a hardware limitation.

Best regards,

Michal

RE: nPM1300 hardware options for solar charging

Michal — Fri, 20 Dec 2024 17:42:07 GMT

Hello Odhrán,

I will ask internally if we have any solutions, but we are now in a Christmas period, so most likely I won't be able to provide more information until the second week of January.

Best regards,

Michal