BQ27500_08 Datasheet, PDF (25/39 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

www.ti.com
NORMAL
IT Operations
(dsg, chg, rlx)
Bad batt ^Yes
detected?
No
Batt
Yes
removed?
No
Forced Yes
SLEEP
mode?
No
bq27500
bq27501
System-Side Impedance Track™ Fuel Gauge
SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008
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
I_CC >
I_standby -OR-
T_r > 30min?
No
Batt
No
removed?
Yes
No batt present
-OR- bad batt
(BAT_GD
disabled)
Batt
Yes
detected?
No
SLEEP
Bad batt
No
detected?
Yes
Yes AC or USB
present?
No
End
Figure 5-1. BAT_GD Pin Operation, Based Upon Battery Presence and bq27500 Operating Mode
Submit Documentation Feedback
FUNCTIONAL DESCRIPTION
25