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FUNCTIONAL DESCRIPTION
STATE DIAGRAMS
STATE DIAGRAMS
PWR OFF
Charger: OFF
LED: OFF
V IN > V POR
Not
DISABLE
VERIFICATION
Disable
Enabled
ENABLE
VERIFICATION
Charger: OFF
LED: OFF
POWER PRESENCE
INDICATION
Charger: OFF
LED: RGYO
POR
Charger: OFF
LED: OFF
changes to
disable
Anytime EN pin
LED: no change
Charger: unchange verified
Disable not verified,
resume to previous
operation
Enabled
0.5-sec
DELAY
Charger: OFF
LED: OFF
TEMP and OV
fault removed
TEMP/OV FAULT
Charger: OFF
LED: YELLOW
BATTERY CONNECTION
VERIFICAION
Charger: OFF
LED: OFF
Good
connection
Bad
connection
BATTERY CONNECTION
FAULT
Charger: OFF
LED: YELLOW
Anytime a TEMP
or OV Fault
occurs (except in
TRICKLE
CHARGE
Charger: ON
LED: RED
V BAT < V TRKL when 1/8
TIMEOUT completes
TIMEOUT FAULT
Charger: OFF
LED: YELLOW
TIMEOUT fault)
V BAT drops
below V TRKL
V BAT > V TRKL before 1/8
TIMEOUT completes
EN pin
changes to
Disable
FAST CHARGE
Charger: ON
LED: RED
V BAT > V RECH
and I CHG < I EOC
CHARGE
COMPLETION
TIMEOUT
To Disable
Verification
V BAT > V RECH and I CHG < I EOC
or
Charger: OFF
LED: GREEN
TIMEOUT completes
V BAT < V RECH
BATTERY CONNECTION
VERIFICATION
Charger: OFF
Bad
connection
V BAT drops
below V TRKL
LED: GREEN
Good
connection
RECHARGE
Charger: ON
LED: GREEN
Figure 23. 34674 Flow Chart
34674
Analog Integrated Circuit Device Data
Freescale Semiconductor
19
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