BQ27505-J3 Datasheet, PDF (30/44 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27505-J3
Not Recommended for New Designs
SLUS986A – OCTOBER 2009 – REVISED FEBRUARY 2010
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5.3.6 SOC_INT pin
The SOC_INT pin generates a pulse with different pulse width under various conditions. Some features
needs to be enabled by setting the Operation Config. In any given one second, only one SOC_INT pulse
could be generated. In other words, the 1ms SOC_INT pulse could indicated multiple events generating
the 1ms pusles.
Table 5-5. SOC_INT Pulse Condition and Width
Enable Condition
SOC_Delta
Point
SOC_Delta ≠ 0
SOC1 Set Always
SOC1 Clear Always
SysDown Set Always
SysDown
Clear
Always
State
Change
SOC_Delta ≠ 0
Battery
Removal
INT_BREM bit is set in
OpConfig AND BIE bit is
set
OCV
Command
After Initialization
OCV
Command
INT_FOCV bit is set in
OpConfig
Data Flash After Initialization AND
Write
DFWrIndWaitTime ≠ 0
Pulse Width
1 ms
1 ms
1 ms
1 ms
1 ms
1 ms
Comment
During charge, when the SOC is greater than (>) the points, 100% - n
× SOC_Delta and 100%;
During discharge, when the SOC reaches (≤) the points 100% - n ×
SOC_Delta and 0%;
where n is an integer starting from 0 to the number generating SOC no
less than 0%
When RSOC reached the SOC1 Set or Clear threshold set in the Data
Flash and BL_INT bit in Operation Configuration B is set.
When the Battery Voltage reached the SysDown Set or Clear threshold
set in the Data Flash
When there is a state change including charging, discharging and
relaxation. This function is disabled when SOC_Delta is set to 0.
1ms
This function is disabled when BIE is cleared.
About 165ms. Same
as the OCV
command execution
time period
SOC_INT pulses for the OCV command after the initialization.
About 165ms. Same
as the OCV
command execution
time period
This command is to generate the SOC_INT pulse during the
initialization.
Programmmable time
pluse flash erase and
write time
SOC_INT is used to indicate the data flash update. The gauge will wait
DFWrIndWaitTime times 5ms after the SOC_INT signal to start the
data flash update. This function is disabled if DFWrIndWaitTime is set
to 0.
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FUNCTIONAL DESCRIPTION
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