ACT8740
Rev PrB, 25-Feb-08
FUNCTIONAL BLOCK DIAGRAM
VSYS
BODY AND
VSYS
CONTROL
ACT8740
BAT
VIN
4.3V to 6V
Li+ Battery
+
AC Adaptor
or USB
CURRENT
SENSE
VINUVLO
VOLTAGE
SENSE
4.0V
PRE-
CONDITION
Charge
Control
OUT3
2.9V
THERMAL
REGULATION
CHGLEV
FLOAT
110°C
VP1
To Battery
SCL
SW1
OUT1
GP1
Serial
Interface
SDA
OUT1
VSYS
VINUVLO
nMSTR
To Battery
OUT2
SW2
PUSH
BUTTON
OVP2
OUT3
nIRQ
System
Control
FB2
GP2
INL
To Battery
OUT3
ON1
OUT3
LDO
REG3
REFBP
OUT4
OUT5
Reference
LDO
REG4
OUT4
OUT5
GA
LDO
REG5
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