BQ24273 Datasheet, PDF (5/27 Pages) Texas Instruments – 2.5A, Single Input, Single Cell Switchmode Li-Ion Battery Charger with Integrated Current Sense

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BLOCK DIAGRAM
bq24273
SLUSB08 – JUNE 2012
PMID
BYP
5.2V
Reference
DRV
IN
5A
CbC Current
Limit
BOOT
IN IINLIM
IN VINDPM
VSYS(REG)
DC-DC CONVERTER PWM LOGIC,
COMPENSATION AND BATTERY
FET CONTROL
IBAT(REG)
VBAT(REG)
DIE Temp
Regulation
Q1
SW
Q2
PGND
VIN
+
VINOVP
OVP
Comparator
VIN
+
VBAT+VSLP
Sleep
Comparator
VSUPPLY References
Termination
Comparator
10% of
ICHARGE
IBAT
Start Recharge
Cycle
Enable Linear
Charge
Recharge Comparator
+ V_BATREG – 0.12V
VBAT
VSYSREG Comparator
+ VSYS
VMINSYS
SDA
SCL
CD
STAT
INT
I2C
Interface
Enable
I BATSHRT
VBATSC Comparator
+ V_BAT
VBATSHRT
Supplement COMPARATOR
+
VBAT ^VBSUP
VSYS
VBOVP Comparator
+ V_BAT
VBATOVP
DISABLE
1C /
0.5 C
4.2V/4.06 V
DISABLE
CHARGE
CONTROLLER
w/ Timer
+
TS COLD
+
TS COOL
+
TS WARM
+
TS HOT
VDRV
CS+
BAT
TS
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