Datasheet

VCC
BTST
HIDRV
PH
REGN
LODRV
GND
TS
bq24620
CE
VFB
SRP
6VLDO
20XV(SRP-SRN)
COMP
ERROR
AMPLIFIER
1V
1.8 V
IBAT_ REG
SRN
STATE
MACHINE
LOGIC
BATTERY
DETECTION
LOGIC
VCC
PH
4.2V
+
_
BTST
REFRESH
CE
145 degC
IC Tj
TSHUT
SRN +100 mV
VCC
SLEEP
LEVEL
SHIFTER
+
-
+
-
+
-
+
-
+
-
V(SRP -SRN )
CHG _OCP
+
-
160 % XIBAT _REG
SYNCH
SRP-SRN
ISET
IBAT _ REG
ISET
ISET
8
5 mV
20 X
BAT
BAT _OVP
+
-
108 % XVBAT _REG
LTF
HTF
VREF
TCO
+
-
+
-
SUSPEND
VCC
ACOV
+
-
V
ACOV
ENA _BIAS
VREF
STAT
STAT
3.3 V
LDO
VCC
VFB
LOWV
+
-
RCHRG
+
-
0.35V
+
-
1.675 V
VFB
LOWV
RCHRG
TERM
+
-
20XV(SRP-SRN)
TERM
TERMINATECHARGE
+
-
bq24620
+
-
+
-
UVLO
V
UVLO
VCC
SLEEP
UVLO
PWM
CONTROL
LOGIC
+
-
PWM
+
-
+
-
+
-
PG
+
-
CHARGE
20 mA
DISCHARGE
CHARGE
8 mA
BAT _OVP
VOLTAGE
REFERENCE
VREF
ISET
10
PG
5HRSafety
Timer
30 minute
Precharge
Timer
FAULT
FAULT
2 mA
1M
DISCHARGE
-
+
+
-
+
-
COOL
WARM
COOL
WARM
20 mA
1.25mV
bq24620
SLUS893A –MARCH 2010– REVISED OCTOBER 2011 www.ti.com
BLOCK DIAGRAM
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