Datasheet

bq27541-G1

SLUSAL6C –NOVEMBER 2011–REVISED OCTOBER 2012

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Pack Configuration B Register

Some bq27541-G1 pins are configured via the Pack Configuration B data flash register, as indicated in

Table 14. This register is programmed/read via the methods described in Accessing the Data Flash. The register

is located at subclass = 64, offset = 2.

Table 14. Pack Configuration B Bit Definition

bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

ChgDoDE SE_TDD VconsEN SE_ISD RSVD LFPRelax DoDWT FConvEn

Default = 1 0 1 0 0 1 1 1

0x67

ChgDoDEoC = Enable DoD at EoC recalculation during charging only. True when set. Default setting is recommended.

SE_TDD = Enable Tab Disconnection Detection. True when set. (See Tab Disconnection Detection)

VconsEN = Enable voltage consistency check. True when set. Default setting is recommended.

SE_ISD = Enable Internal Short Detection. True when set. (See Internal Short Detection)

RSVD = Reserved. Must be 0

LFPRelax = Enable LiFePO4 long relaxation mode. True when set.

Enable DoD weighting feature of gauging algorithm. This feature can improve accuracy during relaxation in a

DoDWT =

flat portion of the voltage profile, especially when using LiFePO4 chemistry. True when set.

FConvEn = Enable fast convergence algorithm. Default setting is recommended. (See Fast Resistance Scaling)

Pack Configuration C Register

Some bq27541-G1 algorithm settings are configured via the Pack Configuration C data flash register, as

indicated in Table 15. This register is programmed/read via the methods described in Accessing the Data Flash.

The register is located at subclass = 64, offset = 3.

Table 15. Pack Configuration C Bit Definition

bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

RSVD RSVD RelaxRCJumpOK SmoothEn SleepWkCh RSVD RSVD RSVD

Default = 0 0 0 1 1 0 0 0

0x18

RSVD = Reserved. Must be 0.

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

RelaxRCJumpOK =

True when set.

SmoothEn = Enable SOC smoothing algorithm. True when set. (See StateOfCharge Smoothing)

SleepWkChg = Enables compensation for the passed charge missed when waking from SLEEP mode.

Product Folder Links: bq27541-G1