bq29330
www.ti.com
SLUS673A–SEPTEMBER 2005–REVISED DECEMBER 2005
SAFETY STATE DIAGRAM
LEGEND:
UVLO = Undervoltage Lock Out
KEY:
Disabled = OFF and cannot be changed via firmware
No Power Supply
Enabled= Can be changed by firmware
Power Supply to PACK
Power Supply to PACK
UVLO Mode
CHG: OFF
Ship Mode
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG: OFF
DSG: OFF
ZVCHG: OFF
RST: HIGH
2
I
VREG/VLED: OFF/OFF
C: Disabled
2
Current Protection: Disabled
VCELL: Disabled
I
C: Disabled
Current Protection: Disabled
VCELL: Disabled
Watchdog: Disabled
Watchdog: Disabled
Therm, Output: Disabled
Therm, Output: Disabled
Internal
> 2.4 V
Internal V
LED
Firmware Command
& No Supply to PACK
V
LED
< 2.3 V
Firmware
Normal Mode
CHG: ON
Command
No supply PACK
DSG: OFF
voltage Mode
DSG: ON
DSG: OFF
ZVCHG: OFF
VREG/VLED: 2.5V/3.3V
RST: Driven low after tRST
2
Firmware
Command
I
C: Enabled
Firmware
Current Protection: Enabled
VCELL: Enabled
Command
32 kHz Resumes
Watchdog: Enabled
FirmwareCommand
Therm, Output: Enabled
Sleep Mode
Firmware
Command
CHG: OFF
DSG: OFF
ZVCHG: OFF
VREG/VLED: ON/ON
32 kHz Input Halted
and t
expired
WTO
VSR > VOL or VSCD for a period of tOL or tSCD
Respectively, or VSR > VSCC for a period
of tSCC
Firmware
2
I
C: Enabled
Command
Current Protection: Enabled
VCELL: Enabled
Watchdog: Enabled
Therm, Output: Disabled
WTO Mode
CHG: OFF
Current Protection Mode
CHG: OFF
DSG: OFF
DSG: OFF
ZVCHG: OFF
32 kHz Input Halted
expired
WTO
ZVCHG: OFF
VREG/VLED: 2.5 V/3.3 V
and t
VREG/VLED: 2.5 V/3.3 V
RST: Pulsed
2
I
C: Enabled
2
I
C: Enabled
Current Protection: Enabled
VCELL: Enabled
Current Protection: Enabled
VCELL: Enabled
Watchdog: Enabled
Watchdog: Enabled
Therm, Output: Enabled
Therm, Output: Enabled
5
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