MCP73844 Microchip Technology, MCP73844 Datasheet - Page 12

• Manufacturer Part Number: MCP73844
• Description: (MCP73841 - MCP73844) Advanced Single or Dual Cell Lithium-Ion/ Lithium-Polymer Charge Management Controllers
• Manufacturer: Microchip Technology

FIGURE 4-1:
Yes
Preconditioning Phase
Charge Current = I
Reset Safety Timer
Note: The qualification parameters are continuously
Temperature OK
Operational Flow Algorithm -
Safety Timer
V
monitored throughout the charge cycle.
BAT
Expired
> V
No
No
No
STAT1 = Flashing
Safety Timer Suspended
Charge Current = 0
PTH
PREG
Yes
Yes
Fault
Charge Current = 0
Reset Safety Timer
V
or EN Low
DD
< V
Yes
UVLO
MCP73841
No
STAT1 = Flashing
No
Note
Note
and
Yes
Yes
Constant-Current
Phase
Charge Current = I
Reset Safety Timer
MCP73842.
Temperature OK
Temperature OK
V
Safety Timer
V
V
DD
BAT
BAT
Initialize
EN High
Expired
> V
> V
= V
Yes
Yes
Yes
No
No
UVLO
REG
PTH
No
STAT1 = Flashing
Safety Timer Suspended
Charge Current = 0
REG
Yes
No
STAT1 = Off
STAT1 = On
No
STAT1 = Flashing
Charge Current = 0
Yes
Safety Timer Suspended
Constant-Voltage Phase
Output Voltage = V
Temperature OK
Charge Current = 0
Elapsed Timer
STAT1 = Flashing
I
OUT
Expired
< I
No
TERM
REG
No
Yes
Charge Termination
Charge Current = 0
Reset Safety Timer
V
V
or EN Low
DD
Yes
BAT
< V
< V
UVLO
RTH
No
STAT1 = Off