Microchip Technology MCP73833EV Data Sheet
© 2009 Microchip Technology Inc.
DS22005B-page 13
MCP73833/4
4.0
FUNCTIONAL DESCRIPTION
The MCP73833/4 is a highly advanced linear charge
management controller. Refer to the functional block
diagram and
management controller. Refer to the functional block
diagram and
that depicts the operational
flow algorithm from charge initiation to completion and
automatic recharge.
automatic recharge.
FIGURE 4-1:
Flow Chart.
V
BAT
< V
PTH
* Continuously Monitored
Timer Expired
SHUTDOWN MODE *
V
DD
< V
UVLO
V
DD
< V
BAT
STAT1 = HI-Z
STAT2 = HI-Z
STAT2 = HI-Z
PG = HI-Z
STANDBY MODE *
V
BAT
(V
REG
+ 100 mv)
PROG > 200 k
Ω
STAT1 = HI-Z
STAT2 = HI-Z
STAT2 = HI-Z
PG = LOW
SYSTEM TEST (LDO) MODE
V
THERM
> (V
DD
- 100 mv)
PROG > 20 k
Ω
STAT1 = LOW
STAT2 = LOW
STAT2 = LOW
PG = LOW
Timer Suspended
TEMPERATURE FAULT
No Charge Current
STAT1 = Hi-Z
STAT2 = Hi-Z
STAT2 = Hi-Z
PG = LOW
Timer Suspended
TIMER FAULT
No Charge Current
STAT1 = Hi-Z
STAT2 = Hi-Z
STAT2 = Hi-Z
PG = LOW
Timer Suspended
PRECONDITIONING MODE
Charge Current (I
PREG
STAT1 = LOW
STAT2 = Hi-Z
PG = LOW
Timer Reset
FAST CHARGE MODE
Charge Current (I
REG
STAT1 = LOW
STAT2 = Hi-Z
PG = LOW
Timer Enabled
CONSTANT VOLTAGE MODE
Charge Voltage (V
REG
STAT1 = LOW
STAT2 = Hi-Z
PG = LOW
CHARGE COMPLETE MODE
No Charge Current
STAT1 = HI-Z
STAT2 = LOW
PG = LOW
Timer Reset
V
BAT
> V
PTH
V
BAT
= V
REG
V
BAT
< I
TERM
Timer Expired
V
BAT
> V
PTH
V
BAT
< V
RTH