Datasheet

 2009-2013 Microchip Technology Inc. DS22191E-page 11
MCP73123/223
4.0 DEVICE OVERVIEW
The MCP73123/223 are simple, but fully integrated
linear charge management controllers.
Figure 4-1
depicts the operational flow algorithm.
FIGURE 4-1: The MCP73123/223 Flow Chart.
V
BAT
< V
PTH
Timer Expired
SHUTDOWN MODE
V
DD
< V
UVLO
V
DD
< V
PD
or
PROG > 200 k
STAT = High-Z
TEMPERATURE FAULT
No Charge Current
STAT = Flashing (Type 2)
STAT = High-Z (Type 1)
Timer Suspended
TIMER FAULT
No Charge Current
STAT = Flashing (Type 2)
STAT = High-Z (Type 1)
Timer Suspended
PRECONDITIONING MODE
Charge Current = I
PREG
STAT = LOW
Timer Reset
Timer Enable
FAST CHARGE MODE
Charge Current = I
REG
STAT = LOW
Timer Reset
Timer Enabled
CONSTANT VOLTAGE MODE
Charge Voltage = V
REG
STAT = LOW
CHARGE COMPLETE MODE
No Charge Current
STAT = High-Z
Timer Reset
V
BAT
> V
PTH
V
BAT
= V
REG
V
BAT
< I
TERM
V
BAT
> V
PTH
V
BAT
< V
RTH
V
DD
< V
OVP
V
DD
> V
OVP
OVERVOLTAGE PROTECTION
No Charge Current
STAT = High-Z
Timer Suspended
V
DD
> V
OVP
V
DD
< V
OVP
V
DD
> V
OVP
V
DD
< V
OVP
Timer Expired
TIMER FAULT
No Charge Current
STAT = Flashing (Type 2)
STAT = High-Z (Type 1)
Timer Suspended
Die Temperature > T
SD
Die Temperature < T
SDHYS
Charge Mode Resume
BATTERY SHORT PROTECTION
Charge Current = I
SHORT
STAT = Flashing (Type 2)
STAT = High-Z (Type 1)
Timer Suspended
V
BAT
> V
SHORT
V
BAT
< V
SHORT
Charge Mode Resume