BQ78350-R1: What if the full pack capacity is larger than the maximum value programmable for design capacity?

Greg Decker

Part Number: BQ78350-R1

I'm working on a high capacity pack, and the theoretical capacity is greater than the maximum design capacity that can be set in the dataflash.

How big of a problem is this?

over 4 years ago

0 Matt Sunna over 4 years ago

TI__Guru* 81034 points

Hi Greg,

This should not be a problem. This document should be helpful:

/cfs-file/__key/communityserver-discussions-components-files/196/1300.6562.Gauge-Design-Configurations-for-High-Charge--Discharge-Rate-Applications.pdf

By the way, I recommend using the BQ78350-R1A which comes pre-loaded with the latest firmware. It is identical to the BQ78350-R1 except there was an improvement to the firmware to make the Shutdown feature more robust.

Best regards,

Matt

0 Greg Decker over 4 years ago in reply to Matt Sunna

Prodigy 225 points

I have some questions on the current scaling for high capacity packs.

~~Page 5 says to scale all current and capacity flash values except AOCD, ASCC and ASCD. Why wouldn't I scale those to be in line with the scaled calibration?~~

Never mind. Those parameters are voltage based, not current based.

On page 26 of the slide deck, there are two parameters under "not scaled" and six parameters that are in boxes. Which of those are scaled and which ones are not? This seems to contradict page 5.

+1 Matt Sunna over 4 years ago in reply to Greg Decker

TI__Guru* 81034 points

Hi Greg,

All of the units in mA and mAh need to be scaled. This was a from a live presentation, so I'm not sure what the significance of the boxes is.

0 Greg Decker over 4 years ago in reply to Matt Sunna

Prodigy 225 points

Ok. Thanks.

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BQ78350-R1: What if the full pack capacity is larger than the maximum value programmable for design capacity?