LTC4061 Datasheet, PDF (13/20 Pages) Linear Technology – Standalone Linear Li-lon Battery Charger with Thermistor Input

LTC4061
APPLICATIO S I FOR ATIO
POWER ON
DEFECTIVE BATTERY
FAULT MODE
NO CHARGE CURRENT
CHRG STATE: PULSING
1/4 CHARGE TIME
ELAPSES
TRICKLE CHARGE MODE
1/10TH FULL CURRENT
EN = 0V
OR UVLO
CONDITION
STOPS
CHRG STATE: PULL-DOWN
BAT < 2.9V
BAT > 2.9V
CHARGE MODE
FULL CURRENT
CHRG STATE:
2.9V < BAT < 4.1V PULL-DOWN IF IBAT > IDETECT
Hi-Z IF I_BAT < I_DETECT
CHARGE TIME
ELAPSES
BAT > 4.1V
STANDBY MODE
NO CHARGE CURRENT
CHRG STATE: Hi-Z
BAT < 4.1V
RECHARGE MODE
FULL CURRENT
1/2 CHARGE
TIME ELAPSES
CHRG STATE:
PULL-DOWN IF I_BAT > I_DETECT
Hi-Z IF I_BAT < I_DETECT
4061 F03
SHUTDOWN MODE
I_CC DROPS TO 20µA
CHRG STATE: Hi-Z
EN = 5V
OR
UVLO CONDITION
Figure 3. State Diagram of a Charge Cycle
Using Charge Time Termination
4061fa
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