LTC4061-4 Datasheet, PDF (14/20 Pages) Linear Technology – Standalone Linear Li-Ion Battery Charger with Thermistor Input

LTC4061-4.4
APPLICATIO S I FOR ATIO
POWER ON
TRICKLE CHARGE MODE
1/10TH FULL CURRENT
CHRG STATE: PULL-DOWN
BAT < 2.9V
BAT > 2.9V
2.9V < BAT < 4.275V
CHARGE MODE
FULL CURRENT
EN = 0V
OR UVLO
CONDITION
STOPS
SHUTDOWN MODE
I_CC DROPS TO 20µA
BAT < 4.275V
BAT > 4.275V
CHRG STATE: PULL-DOWN
CHRG STATE: Hi-Z
I_BAT < I_DETECT
IN VOLTAGE MODE
STANDBY MODE
NO CHARGE CURRENT
CHRG STATE: Hi-Z
40614.4 F04
EN = 5V
OR
UVLO CONDITION
Figure 4. State Diagram of a Charge Cycle
Using Charge Current Termination
POWER ON
TRICKLE CHARGE MODE
1/10TH FULL CURRENT
CHRG STATE: PULL-DOWN
BAT < 2.9V
BAT > 2.9V
CHARGE MODE
FULL CURRENT
2.9V < BAT
CHRG STATE:
PULL-DOWN IF I_BAT > I_DETECT
Hi-Z IF I_BAT < I_DETECT
40614.4 F05
EN = 0V
OR UVLO
CONDITION
STOPS
SHUTDOWN MODE
I_CC DROPS TO 20µA
CHRG STATE: Hi-Z
EN = 5V
OR
UVLO CONDITION
Figure 5. State Diagram of a Charge Cycle
Using User-Selectable Termination
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