Datasheet

bq27541-G1
SLUSAL6C –NOVEMBER 2011–REVISED OCTOBER 2012 www.ti.com
Table 17. SE Pin State
Shutdown Mode
[INTSEL] = 1 and
([SE_EN] or [SHUTDOWN] =1)
[SE_PU] [SE_POL] Normal state Shutdown state
0 0 High Impedance 0
0 1 0 High Impedance
1 0 1 0
1 1 0 1
Interrupt Mode
By utilizing the interrupt mode, the system can be interrupted based on detected fault conditions as specified in
Table 20. The SE or HDQ pin can be selected as the interrupt pin by configuring the [INTSel] bit based on . In
addition, the pin polarity and pull-up (SE pin only) can be configured according to the system needs as described
in Table 18 or Table 19.
Table 18. SE Pin in Interrupt Mode ([INTSEL]=0)
[SE_PU] [INTPOL] INTERRUPT CLEAR INTERRUPT SET
0 0 High Impedance 0
0 1 0 High Impedance
1 0 1 0
1 1 0 1
Table 19. HDQ Pin in Interrupt Mode ([INTSEL]=1)
[INTPOL] INTERRUPT CLEAR INTERRUPT SET
0 High Impedance 0
1 0 High Impedance
Table 20. Interrupt Mode Fault Conditions
Flags() STATUS
INTERRUPT CONDITION ENABLE CONDITION COMMENT
BIT
The SOC1 Set/Clear interrupt is based on the[SOC1] Flag
SOC1 Set/Clear [SOC1] Always condition when RemainingCapacity() reaches the SOC1 Set
or Clear threshold in the Data Flash.
The [OTC] Flag is set/clear based on conditions specified in
Over Temperature Charge [OTC] OT Chg Time ≠ 0
“Over-Temperature: Charge” Section.
Over Temperature The [OTD] Flag is set/clear based on conditions specified in
[OTD] OT Dsg Time ≠ 0
Discharge “Over-Temperature: Discharge” Section.
The [BATHI] Flag is set/clear based on conditions specified in
Battery High [BATHI] Always
“BATTERY LEVEL INDICATION” Section.
The [BATLOW] Flag is set/clear based on conditions
Battery Low [BATLOW] Always
specified in “BATTERY LEVEL INDICATION” Section.
[SE_ISD]=1 in The [SE_ISD] Flag is set/clear based on conditions specified
Internal Short Detection [ISD]
in “INTERNAL SHORT DETECTION” Section
Pack Configuration B
[SE_TDD]=1 in The [TDD] Flag is set/clear based on conditions specified in
Tab disconnection
[TDD]
“TAB DISCONNECTION DETECTION” Section
detection
Pack Configuration B
Battery Level Indication
The bq27541-G1 can indicate when battery voltage has fallen below or risen above predefined thresholds. The
[BATHI] of Flags() is set high to indicate Voltage() is above the BH Set Volt Threshold for a predefined duration
set in the BH Volt Time. This flag returns to low once battery voltage is below or equal the BH Clear Volt
threshold. It is recommended that the BH Set Volt Threshold is configured higher than the BH Clear Volt
threshold to provide proper voltage hysteresis.
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