BQ27426: RelaxRCJumpOk query

FRANK1

Part Number: BQ27426
Other Parts Discussed in Thread: BQ27542-G1, BQ40Z50, BQ27Z561, BQ27541-G1

Hi sir,

I would like to ask about RelaxRCJumpOk bit of fuel gauge.
Does TI fuel gauge BQ27421 or BQ27426 have this bit ? if yes, is it bit3 of opConfigB?
BTW, may I ask you about what is the purpose / function of RelaxRCJumpOk in TI fuel gauge?
Thanks.
Regards,

over 4 years ago

0 Jessica H. over 4 years ago

TI__Genius 11535 points

Hi Frank,

This is not a bit in either fuel gauge. Where did you see RelaxRCJumpOk? I don't think I have seen it before in any of our gauges.

Best,

Jessica

0 FRANK1 over 4 years ago in reply to Jessica H.

TI__Expert 8555 points

HI Jessica,

How about BQ27542-G1? it looks like this device has relex ROSC jump

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/893097/bq27542-g1-bq27542-g1-roomtemperature-relex-rosc-jump/3312069?tisearch=e2e-sitesearch&keymatch=Relax%25252525252520RC%25252525252520Jump#3312069|https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/893097/bq27542-g1-bq27542-g1-roomtemperature-relex-rosc-jump/3312069?tisearch=e2e-sitesearch&keymatch=Relax%25252525252520RC%25252525252520Jump#3312069

Thanks.

0 Wyatt Keller over 4 years ago in reply to FRANK1

TI__Guru** 105760 points

Hello Frank,

The gauges you linked do not have this functionality, in some of our more popular gauges (bq27z561, bq40z50) It is the relax_jump_ok bit. The bit allows RSOC to jump when the gauge in relaxed mode.

The bit you're referring to is in the BQ27541-G1 though.

Definition:

Allow SOC to change due to temperature change during relaxation when SOC smoothing algorithm is enabled.

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ27426: RelaxRCJumpOk query