MCP73844 Microchip Technology, MCP73844 Datasheet - Page 2

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

MCP73841/2/3/4
Functional Block Diagram
DS21823B-page 2
THERM
SENSE
THREF
TIMER
V
EN
DD
90 k
10 k
100 k
50 k
50 k
V
1 k
MCP73841 and MCP73842 Only
REF
V
Charge
Termination
Comparator
+
+
–
+
+
+
UVLO
-
-
-
-
Bias and
Reference
Generator
UVLO
Comparator
Temperature
Comparators
Charge
Current
Amplifier
12 k
I
REG
/10
10 k
90 k
Power-On
V
V
Delay
UVLO
REF
V
REF
(1.2V)
Charge Current
Control Amplifier
Precondition
+
–
Control
Oscillator
I
REG
V
DD
/10
Charge_ok
Precon
Voltage Control
Amplifier
Charge Control,
Charge Timers,
Status Logic
And
V
+
Constant-Voltage/
Recharge Comp.
-
REF
Precondition
Comp.
Charge_ok
Drv Stat 1
V
REF
+
+
-
-
2004 Microchip Technology Inc.
0.79 k
74.21 k
300 k
(825 k )
150.02 k
5.15 k
(4.29 k )
DRV
V
V
STAT1
BAT
SS