MCP73871 Microchip Technology, MCP73871 Datasheet - Page 19

• Manufacturer Part Number: MCP73871
• Description: Stand-Alone System Load Sharing and Li-Ion / Li-Polymer Battery Charge Management Controller
• Manufacturer: Microchip Technology

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The MCP73871 device is a simple, but fully integrated
linear charge management controllers with system
load
operational flow algorithm.
FIGURE 4-1:
© 2009 Microchip Technology Inc.
TEMPERATURE FAULT
sharing
No Charge Current
Timer Suspended
DEVICE OVERVIEW
STAT1 = LOW
STAT2 = LOW
PG = LOW
feature.
MCP73871 Device Flow Chart.
Figure 4-1
CONSTANT VOLTAGE MODE
CHARGE COMPLETE MODE
PRECONDITIONING MODE
depicts
V
FAST CHARGE MODE
Charge Voltage = V
Charge Current = I
SHUTDOWN MODE *
Charge Current = I
BAT
STANDBY MODE *
No Charge Current
STAT1 = LOW
STAT1 = LOW
STAT2 = LOW
Timer Enabled
STAT1 = Hi-Z
STAT2 = Hi-Z
STAT1 = Hi-Z
STAT2 = Hi-Z
STAT2 = Hi-Z
STAT2 = Hi-Z
STAT1 = Hi-Z
STAT1 = LOW
> (V
Timer Reset
V
STAT2 = Hi-Z
PG = LOW
PG = LOW
CE = LOW
V
PG = LOW
PG = LOW
Timer Reset
PG = Hi-Z
PG = LOW
DD
DD
the
REG
< V
< V
I
Timer Expired
V
UVLO
+100 mV)
V
BAT
BAT
BAT
BAT
< I
< V
REG
PREG
> V
REG
TERM
PTH
PTH
V
BAT
Timer Expired
> V
* Continuously Monitored
PTH
MCP73871
No Charge Current
STAT1 = LOW
STAT2 = Hi-Z
TIMER FAULT
STAT1 = LOW
STAT2 = LOW
Timer Reset
V
PG = Hi-Z
PG = LOW
IN
LBO *
< V
DS22090B-page 19
BAT