Datasheet

USB
SW
+
+
BOOT
DRV
SYS
BAT
V
MINSYS
BGATE
STAT
+
SDA
SCL
+
+
VDRV
TS
TS COLD
TS HOT
TS WARM
TS COOL
1C/
0.5C
DISABLE
V
SYSREG
Comparator
+
PMID
DC-DC CONVERTER PWM LOGIC,
COMPENSATION AND BATTERY
FET CONTROL
V
BATREG
– 0.14V
5.2V
Reference
V
BATSHRT
+
V
BATSC
Comparator
V
BAT
Termination
Comparator
CHARGE
CONTROLLER
w/ Timers
+
Termination
Reference
V
BATREG
– 0.12V
+
Recharge Comparator
V
BAT
V
SYS
Enable Linear
Charge
PGND
D-
Q3
Q2
Q1
CbC Current
Limit
D+
USB
Adapter
Detection
Circuitry
1.5A /
USB100
INT
I2C
Interface
References
Enable
I
BATSHRT
+
Supplement COMPARATOR
V
BAT
V
BSUP
V
SYS
Hi-Impedance Mode
PSEL
bq24271
bq24270
+
Sleep
Comparator
V
BAT
+V
SLP
V
USB
V
BAT
Good Battery
Circuit
5A
+
USB I
USBLIM
USB V
INDPM
V
SYS(REG)
I
BAT(REG)
V
BAT(REG)
DIE Temp
Regulation
I
BAT
V
BATGD
Start Recharge
Cycle
DISABLE
+
OVP
Comparator
V
USBOVP
V
USB
V
BATOVP
+
V
BOVP
Comparator
V
BAT
CD
Hi-Z
Mode
BYP
bq24270
bq24271
www.ti.com SLUSB10 –JUNE 2012
BLOCK DIAGRAM
Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): bq24270 bq24271