BQ24153 Datasheet, PDF (14/40 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support

bq24153
bq24156, bq24158
SLUSA27 – MARCH 2010
FUNCTIONAL BLOCK DIAGRAM (Boost Mode)
PMID
PMID
PMID
VBUS
VBUS
V BUS
NMOS
VREF 1
Q1
Charge
Pump
V PMID
OSC
+
I BO
-
+
- ^{V BUS _B}
V BUS
V BUSOVP
TJ
T _SHTDWN
V OUT
V BATMAX
+
VBUS OVP
-
+
Thermal
-
Shutdown
+
* ^{Battery OVP}
-
bq24153/ 8
NMOS
Q2
PWM
Controller
CBC
Current
Limiting
I BLIMIT
PFM Mode
-
+
75 mA
PWM _ BOOST
REFERNCES
& BIAS
Q3
NMOS
VREF
V _PMID
VREF 1
CHARGE CONTROL,
TIMER and DISPLAY
LOGIC
V OUT
PGND
PGND
PGND
V BAT
V BATMIN
+
* ^{Low Battery}
-
* Signal Deglitched
( I2 C Control)
Decoder
DAC
Figure 24. Function Block Diagram of bq2415x in Boost Mode
www.ti.com
SW
SW
SW
VREF
BOOT
CSIN
CSOUT
STAT
CD
OTG
SCL
SDA
14
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