BQ24250C_15 Datasheet, PDF (15/46 Pages) Texas Instruments – bq24250C 2A Single Input I2C, Standalone Switch-Mode Li-Ion Battery Charger with Power-Path Management

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8.2 Functional Block Diagram
PMID
bq24250C
SLUSBY7 – JULY 2014
IN
ILIM
Q1
Charge
Pump
+
CbC
Comparator
LDO
Q2
LDO
BOOT
VDPM
VREF_INLIM
VREF_DPM
Host
IIN_LIM
Amp
VIN_DPM
Amp
PWM
LOOP SELECT
COMPENSATION
DRIVER
VDPM_DAC
I2C Only
Sleep
Comparator
_
VBAT +VSLP ⁺
EN1 / D+
EN2 / D-
SCL
SDA
Input
current limit
decoder /
D+ and D-
Decoder
I2C
Controller
TJ
125 C
VREF_BATREG
VREF_ICHG
MINSYS
Amp _
ICHG
Amp
+ VREF_MINSYS
_
+
VBATREG
Amp _{_}
+
VREF_TERM
V MINSYS
Reference
Termination
Comparator
Recharge Comparator
+ VBATREG – 0.12V
VBAT
V OUTMIN Comparator
+
VOUT
INT / PG
STAT/CHG
CHARGE
CONTROLLER
DISABLE
MINSYS Comparator
+
V SYS
V MINSYS
BATSHORT Comparator
+
VBAT
VBATSHRT
Supplement Comparator
+
VBAT ^VBSUP
VSYS
MINSYS
ICHG Amp
V LDO
Q3
+
VSYSMIN
SW
PGND
ISET
SYS
LDO
Q4
Batt Detect Or
Precharge
Current Source
Charge
Pump
BAT
VLDO
/CE
+
TS -10°C
+
TS 0°C
+
TS 10°C
+
TS 45°C
+
TS 60°C
TS
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