MC34673 Datasheet, PDF (16/22 Pages) Freescale Semiconductor, Inc – High Input Voltage 1.2A Charger for Single-cell Li-Ion Batteries

FUNCTIONAL DEVICE OPERATION
STATE DIAGRAM
STATE DIAGRAM
EN=high
or V_IN>V_OVP
or V_IN<V_BAT+V_OS
V_BAT < 2.7V
V_IN>V_POR
PWR OFF
Charger: OFF
SHUTDOWN
Charger: OFF
EN=low
and V_IN<V_OVP
and V_IN>V_BAT+V_OS
V_BAT > 2.7V
TRICKLE
CHARGE
Charger: ON
FAST CHARGE
Charger: ON
V_BAT=4.2V
and I_BAT < I_EOC
V_BAT < 2.7V
V_IN<V_POR
V_BAT<4.10V
CHARGE
COMPLETE
Charger: ON
Figure 22. Charge Cycle State Diagram
34673
16
Analog Integrated Circuit Device Data
Freescale Semiconductor