Arduino Forum

Products => MKR Boards => MKRVIDOR4000 => Topic started by: djLukas on Feb 27, 2019, 10:44 pm

Title: Vidor Lipo charger
Post by: djLukas on Feb 27, 2019, 10:44 pm
I am looking to use a single cell lipo for powering the Vidor, but I was wondering how the charging circuit is managed? I looked at the schematic and it looks like the charging is being controlled by one of the NX18P3001 chips, but I'm not sure. Regardless, is there a way to monitor the voltage of the battery during charging/use from the SAMD? I would like to have some way of making a low-voltage alert as well as a way to check for over-charging to ensure the safe operation of the lipo. Also, does anyone know what the default charging voltage cutoff is at? 3.7v?

Thanks,
Darius
Title: Re: Vidor Lipo charger
Post by: jwestmoreland on Feb 28, 2019, 09:34 am
Daruis,

The battery charging is managed by this:

U12 bq24195 I2C Controlled 2.5-A /4.5-A Single Cell USB/Adapter Charger
with 5.1 V at 1 A /5.1 V at 2.1 A Synchronous Boost Operation

Datasheet is here:
http://www.ti.com/lit/ds/symlink/bq24195l.pdf


HTH,
John W.
Title: Re: Vidor Lipo charger
Post by: Limba on Feb 28, 2019, 05:32 pm
Default full charge voltage with lipo batteries is 4.2v

Title: Re: Vidor Lipo charger
Post by: djLukas on Mar 01, 2019, 04:32 am
Thanks for the info!
Title: Re: Vidor Lipo charger
Post by: jwestmoreland on Mar 04, 2019, 06:47 am
NP Darius.

This week I've been looking at a project that has the BQ2060; I tried the i2master on the Vidor - but of course that can't work (at least not without a lot of work...)

So, it'd be nice to see some libs/examples for U12.

Regards,
John W.