BQ24158_12 Datasheet, PDF (13/45 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger

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bq24153A, bq24156A
bq24158, bq24159
SLUSAB0A – OCTOBER 2010 – REVISED FEBRUARY 2012
FUNCTIONAL BLOCK DIAGRAM (Charge Mode)
PMID
PMID
PMID
VBUS
VBUS
NMOS
VBUS
VREF 1
Q1
Charge
Pump
I IN _ LIMIT
PGND
PGND
PGND
V _BUS
VUVLO
V IN _ DPM
T CF
TJ
+
-
V _BUS
+
V _IN(MIN)
-
VBUS
VOVP_IN
TJ
T _SHTDWN
VOUT
VOVP
+
-
+
-
+
-
VBAT
+
VBUS
-
VOREG - VRCH
+
VOUT
-
VOUT
VCSIN
I _TERM
-
+
-
VBAT
+
VSHORT
-
VPMID
bq24153A/6A/8/9
NMOS
OSC
-
+
-
+
-
+
-
VBUS UVLO
Q2
PWM
Controller
CBC
Current
Limiting
PWM _ CHG
Poor Input
Source
VBUS OVP
Thermal
Shutdown
* ^{Battery OVP}
* ^Sleep
* ^Recharge
Termination
*
* PWM Charge
Mode
* Signal Deglitched
CHARGE CONTROL
TIMER and DISPLAY
LOGIC
I _LIMIT
-
+
-
Q3
NMOS
+
V _OUT
-
V _OREG
V CSIN
IOCHARGE
VREF
I _SHORT
LINEAR ^_CHG
VREF
REFERNCES
& BIAS
V _PMID
VREF 1
VOUT
( I2 C Control )
Decoder
DAC
Figure 24. Function Block Diagram of bq2415x in Charge Mode
SW
SW
SW
CSOUT
CSIN
VREF
BOOT
STAT
CD
OTG (bq 24153 /8)
SLRST ( bq24156 )
SCL
SDA
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