BQ20Z80ADBTR Datasheet, PDF (13/25 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK

bq20z80
bq20z80A
www.ti.com
SLUS782 – JULY 2007
Table 3. CHANGE DETAILS (continued)
CHANGE
bq0z80-V110
bq20z80-V102
COMMENTS
Proper FET operation in
presence of partial resets
Clear sleep mode flag (and all CHG_off flag set while in SLEEP but
Sbscc_control flags) with partial a partial reset would incorrectly clear
and full resets to correct condition this flag
where charge FET can remain
off.
Prevent false detection of PF
Force full reset for attempted
shutdown (prevent PF_SHUT
from causing a PF condition if
shutdown does not occur)
Shutdown does cause a PF
Allow shutdown to work
correctly when the part is in
sleep
Fix shutdown when in sleep
A race condition was occurring
between sleep and shutdown that
was not allowing the device to
shutdown when in sleep mode.
Change default charger
present voltage from 12000
to 3000 mv
Change default charger present
voltage from 12000 to 3000 mv
bq29312 will not reliably shutdown
until pack+ voltage is below 3000
mv. Prevents failed shutdown
attempts
Meet SBS specification
Change default DF:Rem Cap
Alarm for mWh mode to 10% of
DF:Design Capacity per SBS
spec from 0
Meet SBS specification
Correct
SBS.AbsoluteStateOfCharge( ) to
allow for values >100% per SBS
the spec
Correct cell balance time
when number of cells < 4
cell balance duty cycle now 0.4
"Cell balancing time per cell has
been changed to be based on the
number of cells configured for use in
Operation Cfg A, as below. Each
number indicates the duty cycle, or
the amount of time the cell
balancing FET is on as opposed to
being off. For example, if the duty
cycle is 0.4, and the cycle time is
250 ms, the cell balancing FET will
be on for 100 ms and off for 150
ms.CC1:CC0 = 3 -> 0.4CC1:CC0 =
2 -> 0.3CC1:CC0 = 1 -> 0.224"
For persistent SC conditions Change Default AFE OC Dsg
Recovery from 100 mA to 5 ma
Set SBS.BatteryMode Alarm and
charger bits default to on if
master broadcasts disabled.
Convenient setup to have
BatteryMode Alarm accurately
indicate broadcast state.
Make RemainingCapacity
writeable
Add State of Health parameter
unused data flash
Remove unused FastCharge
OverVoltage
double dataflash value
Faster wakeup response
Check sleep wakeup every 250 Check sleep wakeup every 1000 ms
ms, change from 1000 ms
bq20z80-V101 to bq20z80-V102 Changes
Table 4. CHANGE DETAILS
CHANGE
Corrected to allow display to
turn off when charging and
button pushed.
bq0z80-V102
LED display operates correctly
during charging.
bq20z80-V101
COMMENTS
LED display would stay on until
charging terminated after the button
was pushed. Only occurs when LED
display not configured to be always
on during charging.
Correct operation of the LED
display under all conditions
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