CCS/BQ76PL455EVM: COMP_UV fault

Nidheesh BR

Expert 1170 points

Part Number: BQ76PL455EVM

Tool/software: Code Composer Studio

Hi,

I have connected only 6 lithium ion (4.2V) cells out of 16 cells and shorted all the other to 6th cell.

I have selected only 6 channels for operation.

I have set COMP_UV threshold voltage as 2.5V. System is showing a COMP_UV fault for all 7-16 cells.

Why is it showing a fault when 7-16 cells are not selected and they are shorted to cell 6th?

Please make me understand.

Thanks

Ritul Shah

over 8 years ago

0 David Wiest Jr over 8 years ago

TI__Genius 11480 points

Ritul,

You must set the NCHAN register (address 0x0D) to only 6 cells to disable the window comparators for cells 7-16. The default NCHAN value is 16 cells, which is why you are seeing UV faults on all the shorted cell connections.

0 Nidheesh BR over 8 years ago in reply to David Wiest Jr

Expert 1170 points

Thanks David sir.

UV fault issue has been resolved.

0 David Wiest Jr over 8 years ago in reply to Nidheesh BR

TI__Genius 11480 points

Ritul,

Thanks for letting me know this issue is closed.

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CCS/BQ76PL455EVM: COMP_UV fault