BQ24180_1 Datasheet, PDF (6/41 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and Accessory Power Connection

bq24180
SLUSA02 A – FEBRUARY 2010 – REVISED FEBRUARY 2010
SIMPLIFIED BLOCK DIAGRAM
VBUS
PMID
Q1
5.2V
Reference
SCL
SDA
CD
PSEL
VDRV
STAT
INT
REF
Charge
Pump
Input Current Limit
Amplifier
+
VIN-DPM
Amplifier
+
DC-DC
CONVERTER
PWM LOGIC
AND
COMPENSATION
VDRV
9.8V
16.5V
High-Input
Comparator
OVP
Comparator
Thermal Reg
Amplifier
+
125°C
TJ
IIN_LIMITVINDPM
VITERM
IOUTREG
Amplifier
+
Gm
amp
VICHRG
Termination
Comparator
VOREG
I²C and
CHARGE
CONTROLLER
Recharge
Comparator
+
130mV
-+
Sleep
Comparator
VIN
VBAT
VBATREG
Amplifier
+
VPRECHG Comparator
+
VPRECHG
VHIGH
Comparator
TMR
2X
TIMER
FAULT
SAFETY
TIMERS
VIN
50mA Precharge
Current Source
DCOUT _ILIM
400 mA
max charge DISABLE
+
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DRV
BOOT
Q2
SW
Q3
PGND
CSIN
CSOUT
Q4
Q5
DCOUT
REF
TS
100uA
+ ^{TS COLD}
+ ^{TS WARM}
TS HOT
+
Charge
Pump
Figure 1. Simplified Block Diagram
6
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