Datasheet

MCP73827
DS21704B-page 2 © 2007 Microchip Technology Inc.
Functional Block Diagram
+ -
MODE
COMPARATOR
MODE
I
MON
+ –
CHARGE CURRENT MONITOR AMPLIFIER
138 k
Ω
100 k
Ω
VOLTAGE CONTROL
AMPLIFIER
SHUTDOWN, REFERENCE
GENERATOR
V
REF
(1.2V)
+ –
V
REF
V
IN
CHARGE CURRENT
CONTROL AMPLIFIER
+
–
V
REF
SHDN
V
BAT
GND V
DRV
+
–
CHARGE
CURRENT
AMPLIFIER
V
IN
V
SNS
1.1 k
Ω
12 k
Ω
500 k
Ω
75 k
Ω
75 k
Ω
352.5 k
Ω
(NOTE 1)
CHARGE CURRENT
FOLDBACK AMPLIFIER
+
–
37.5 k
Ω
112.5 k
Ω
V
IN
0.3V CLAMP
N
OTE 1:
Value = 340.5K
Ω
for MCP73827-4.1
Value = 352.5K
Ω
for MCP73827-4.2