BQ24188_15 Datasheet, PDF (13/52 Pages) Texas Instruments – bq24188 2A, 30V, Host-Controlled Single-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path Management and USB-OTG Support

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9.2 Functional Block Diagram
PMID
IN
I_CbCLimit
bq24188
SLUSC44A – DECEMBER 2014 – REVISED MAY 2015
4.8V
Reference
DRV
BOOT
IINLIM
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
+
Sleep
Comparator
VIN
+
VBAT+VSLP
VSUPPLY References
Termination
Reference
Termination
Comparator
IBAT
Start Recharge
Cycle
Recharge Comparator
+ V_BATREG ± 0.12V
VBAT
CD
SDA
SCL
USB
Adapter
Detection
Circuitry
Hi-Z
Mode
I2C
Interface
1.5A /
USB100
Enable Linear
Charge
VSYSREG Comparator
+ V_SYS
VMINSYS
Enable HiZ in
DEFAULT mode
Enable
IBATSHRT
VBATSC Comparator
+ V_BAT
VBATSHRT
+
VBATGD
Supplement COMPARATOR
+
VBAT ^VBSUP
VSYS
VBOVP Comparator
+ V_BAT
VBATOVP
bq24188
PSEL
STAT
INT
DISABLE
1C/
0.5C
VBATREG
± 0.14V
DISABLE
CHARGE
CONTROLLER
w/ Timers
+
TS COLD
+
TS COOL
+
TS WARM
+
TS HOT
Q3
Hi-Impedance Mode
VDRV
SYS
BAT
BGATE
TS
Figure 7. Block Diagram in Charging Mode
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