Marine Instruments User Manual

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Start
Init
(“BAT_GD”
disabled, OCV
taken, “BAT_GD
enabled.)
End
NoBattPresent
-OR- badbatt
(“BAT_GD”
disabled)
BattPresent
SLEEP
NORMAL
Yes
BatteryVolt
Sufficient
toFG?
No
Yes
Batt
removed?
No
Yes
Batt
detected?
No
Bq27500 POR
Batt
detected?
No
Yes
ACorUSB
Present?
Yes
No
IT Operations
(dsg, chg, rlx)
Batt
removed?
Yes
Icc >
I
standby
-OR-
T
r
> 30min
No
Yes
Forced
SLEEP
Mode?
No
Badbatt
detected?
No
Yes
Badbatt
detected?
Yes
No
No
Yes
bq27500
bq27501
System-Side Impedance Track™ Fuel Gauge
SLUS785 – SEPTEMBER 2007
Figure 5-1. BAT_GD Pin Operation, Based Upon Battery Presence and bq27500 Operating Mode
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