Datasheet

LTC4065L/
LTC4065LX/LTC4065L-4.1
12
4065lfb
IS EN > SHUTDOWN
THRESHOLD?
ENABLE
CHRG HIGH IMPEDANCE
SHUTDOWN MODE
IF V
CC
> 3.6V AND
V
CC
> V
BAT
+ 80mV?
UVLO UVLO MODE
1/10 FULL CHARGE CURRENT
CHRG STRONG PULL-DOWN
TRICKLE CHARGE MODE*
FULL CHARGE CURRENT
CHRG STRONG PULL-DOWN
FAST CHARGE MODE
IS V
BAT
< 2.9V?
DEFECTIVE BATTERY
IS V
BAT
< 4.1V? (LTC4065L/LTC4065LX)
IS V
BAT
< 4.0V? (LTC4065L-4.1)
RECHARGE
NO CHARGE CURRENT
CHRG PULSES (2Hz)
BAD BATTERY MODE
FULL CHARGE CURRENT
CHRG STRONG PULL-DOWN
RECHARGE MODE
NO CHARGE CURRENT
CHRG HIGH IMPEDANCE
STANDBY MODE
CHRG HIGH IMPEDANCE
NO
YES
YES YES
NO
NO
4065L F02
V
BAT
≤ 2.9V
1/4 CHARGE CYCLE
(1.125 HOURS)
V
CC
< 3V
OR
EN > SHDN
THRESHOLD
CHARGE CYCLE
(4.5 HOURS)
1/2 CHARGE CYCLE
(2.25 HOURS)
2.9V < V
BAT
< 4.1V (LTC4065L/LTC4065LX)
2.9V < V
BAT
< 4.0V (LTC4065L-4.1)
V
BAT
> 4.1V (LTC4065L/LTC4065LX)
V
BAT
> 4.0V (LTC4065L-4.1)
YES
NO
POWER
ON
*LTC4065L and LTC4065L-4.1 ONLY; LTC4065LX HAS FULL CHARGE CURRENT.
OPERATION
Figure 2. State Diagram of LTC4065L Operation