BQ24266_15 Datasheet, PDF (14/41 Pages) Texas Instruments – bq24266 3A, 30V Standalone Single-Input, Single-Cell Switchmode Li-Ion Battery Charger

bq24266
SLUSBY5F – JUNE 2014 – REVISED AUGUST 2015
7.2 Functional Block Diagram
PMID
IN
VDPM
5A
CbC Current
Limit
IINLIM
VINDPM
VSYS(REG)
IBAT(REG)
DC-DC CONVERTER PWM
LOGIC, COMPENSATION AND
BATTERY FET CONTROL
VBAT(REG)
DIE Temp
Regulation
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4.8-V
Reference
DRV
BOOT
Q1
SW
Q2
PGND
OVP
Comparator
VIN +
VINOVP
Sleep
Comparator
VIN ₊
VBAT+VSLP
VSUPPLY References
Termination
Reference
IUSB1
IUSB2
IUSB3
Input
ILIM
Control
Start
Recharge
Cycle
Enable
Linear
Charge
Enable IBATSHRT
CE
Charge Enable
Disable TS Junction
IBAT
Termination
Comparator
Recharge Comparator
+ VBATREG ± 0.12V
VBAT
VSYSREG Comparator
+ VSYS
VMINSYS
VBATSC Comparator
+ VBAT
VBATSHRT
Supplement Comparator
+
VSYS
VBAT VBSUP
VBOVP Comparator
+ VBAT
VBATOVP
TSOFF
+
Q3
Hi-Impedance Mode
VDRV
PG
CHG
DISABLE
1C/0.5C
VBATREG ± 0.14V
DISABLE
CHARGE
CONTROLLER
w/ Timer
bq24266 Only
+
TS COLD
+
TS COOL
+
TS WARM
+
TS HOT
SYS
BAT
BGATE
ISET
bq24266
TS
Figure 7. Block Diagram in Charging Mode
14
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