BQ27510-G2 Datasheet, PDF (24/38 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection

bq27510-G2
SLUS948 – AUGUST 2010
NORMAL
IT Operations
(dsg, chg, rlx)
Bad batt
Yes
detected?
No
Batt
Yes
removed?
No
Forced
SLEEP
Mode?
No
Start
Bq27500 POR
Batt
No
detected?
Yes
Init
(“BAT _GD”
disabled, OCV
taken, “BAT_GD
enabled.)
Battery Volt No
Sufficient
to FG?
Yes
Batt Present
Yes
Icc >
Istandby -OR-
Tr > 30min
No
No
Batt
removed?
Yes
No Batt Present
-OR- bad batt
(“BAT _GD”
disabled)
Batt
Yes
detected?
No
SLEEP
Bad batt
No
detected?
Yes
www.ti.com
Yes
AC or USB
Present?
No
End
Figure 2. BAT_LOW/BAT_GD Pin Operation, Based Upon Battery Presence and bq27510-G2 Operating
Mode
TEMPERATURE MEASUREMENT
The bq27510-G2 measures battery temperature via its TS input, in order to supply battery temperature status
information to the fuel gauging algorithm and charger-control sections of the gauge. Alternatively, it can also
measure internal temperature via its on-chip temperature sensor, but only if the [TEMPS] bit of Operation
Configuration register is cleared.
Regardless of which sensor is used for measurement, a system processor can request the current battery
temperature by calling the Temperature( ) function (see Standard Data Commands, for specific information).
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