Use MC33771 with less than 14 cells

[IHCHEN]

HI

I want to design a BMU for a 13 cell  Li-Ion Battery 

In MC33771B & 33771C's DataSheet, it's shown that 33771 can support 7 to 14 Channels battery

When I only need 13 channels, how should I design with the 14th channel on 33771 IC?

Is it just need a short between CT13 & 14 as shown in the picture?

IHCHEN_1-1657164483450.png

It seems that the 33771 datasheet didn't introduce about how to design in less then 14 cell

thanks.

[TomasVaverka · Accepted solution]

Hi Ihsiang,

I would recommend you to take a closer look at our AN12536 - Using MC33771 with less than 14 cells.

This application note is classified as a secure file and can be downloaded from the following website: 

https://www.nxp.com/products/power-management/battery-management/battery-cell-controllers/14-channel...

AN12536.JPG

Please make sure you are signed in to nxp.com. If you do not see this AN12536, please click on "Request additional access" or edit your secure access rights by going to My NXP > Profile. 

Best regards,

Tomas