BQ24620 Datasheet, PDF (12/30 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with Low Iq

bq24620
SLUS893 – MARCH 2010
BLOCK DIAGRAM
VREF
3.3 V
LDO
VCC
VREF
VOLTAGE
REFERENCE
SLEEP
UVLO
VCC
-
SRN +100 mV
+
VCC
-
V UVLO
+
SLEEP
UVLO
bq 24620
CE
1M
VFB
1.8 V
COMP
ERROR
AMPLIFIER
-
+
1V
CE
PWM
BAT _OVP
LEVEL
SHIFTER
SRP
SRN
+
20 X
20XV(SRP-SRN)
-
IBAT_ REG
FAULT
20 mA
20 mA
SRP-SRN
+
-
+
5 mV -
SYNCH
BTST
PH ^_+
4.2 V
- REFRESH
+
PWM
CONTROL
LOGIC
VCC
6V LDO
ENA _BIAS
ISET
2 mA
V(SRP -SRN )
-
160 % X IBAT _REG
+
CHG _OCP
8 mA
CHARGE
DISCHARGE
ISET
8
ISET
1.25 mV
5HR Safety ^FAULT
Timer
30 minute
IC Tj
+
Precharge
Timer
145 degC
-
BAT
108 % X VBAT _REG
IBAT _ REG
VFB
0.35V
+
-
VFB
1.675 V
+
-
-
LOWV
+
COOL
WARM
-
RCHRG
+
VCC
+
-
VACOV
+
-
TSHUT
BAT _OVP
LOWV
ACOV
STATE
MACHINE
LOGIC
BATTERY
DETECTION
LOGIC
CHARGE
STAT
PG
DISCHARGE
LTF
COOL
WARM
SUSPEND
HTF
20XV(SRP-SRN)
bq24620
ISET
10
TERM
RCHRG
TERM
TERMINATE CHARGE
TCO
VREF
-
+
-
+
+
-
+
-
+
-
www.ti.com
VCC
BTST
HIDRV
PH
REGN
LODRV
GND
STAT
PG
TS
12
Submit Documentation Feedback
Product Folder Link(s): bq24620
Copyright © 2010, Texas Instruments Incorporated