Some questions regarding the PMIC nPM1300

[Fconta]

I have some initial questions regarding the nPM1300 :) :

- It is possible to download the nPM1300 datasheet as a PDF file instead of viewing it online?

- Regarding VBUS and VBUSOUT pins: Its this just a pass through or is something else between these two pins?

   On other words, with fast chargers able to provide more than 5V, is VBUSOUT over 5V also?

- In following up, does the nPM1300 negociates a higher input voltage than 5V?

- It is a bit unclear to me if VSYS follows VBUS voltage or not.

- For connecting other power source, such as a solar panel, VBUS will still be the main power input pin?

- Lipo protection must be external, right?

- And finally I'm evaluating using a complete module such as those provided by uBlox or Fanstel. No issues with these, right :) ?

Thanks for your help.

[Jared]

Hi,

- It is possible to download the nPM1300 datasheet as a PDF file instead of viewing it online?

nPM1300_OPS_v0.7.pdf

Regarding VBUS and VBUSOUT pins: Its this just a pass through or is something else between these two pins?

   On other words, with fast chargers able to provide more than 5V, is VBUSOUT over 5V also?

VBUSOUT has the same absolute maximum ratings as VBUS namely -0V3 to 5V5, it meant as a pass through for delivering VBUS to board controller. 

- In following up, does the nPM1300 negociates a higher input voltage than 5V?

I'm not sure what you mean by this, but the absolute maximum ratings for the nPM1300 is stated here, and the recommended operating conditions are stated here.

- It is a bit unclear to me if VSYS follows VBUS voltage or not.

VSYS follows VBUS as long as VBUS is connected and within  VBUSOVP and VBUSMIN. 

For connecting other power source, such as a solar panel, VBUS will still be the main power input pin?

Yes, VBUS will still be the input pin for the PMIC,

Lipo protection must be external, right?

The battery should have some innate protection mechanism, but the nPIM1300 has a mechanism such as charge current limit and battery temperature monitor,

- And finally I'm evaluating using a complete module such as those provided by uBlox or Fanstel. No issues with these, right :) ?

Complete module meaning that it has BLE + PMIC? Fanstel and µBlox should be fine,

regards

Jared 

[Fconta]

Hi,

Jared said:

Hi,

- It is possible to download the nPM1300 datasheet as a PDF file instead of viewing it online?

nPM1300_OPS_v0.7.pdf

Thanks:

Regarding the other questions, by checking the documentation, I can see that:

- VBUS maximum input is 22V

- But if a VBUS goes over 5.5V a overvoltage protection is enabled.

- Negociation is only for current from 100mA to 500mA, and it makes sense it is for a 5V input.

Anyway, thanks for your help.

[Jared]

Fconta said:

VBUS maximum input is 22V

Yeah, I meant to write VBAT ;)

Fconta said:

Anyway, thanks for your help.

Good that you found the answers to the others questions,

regards

Jared 

[papadkostas]

Hi, I find this topic relevant for multiple questions, so I hope you dont mind bringing that up.
Just like mentioned above, in a design where not only USB may power the bus but also other sources, would it be recomended to just not use CC lines at all and manually set the default current to higher rates?

Regards
Kostas