BQ24266_15 Datasheet, PDF (15/41 Pages) Texas Instruments – bq24266 3A, 30V Standalone Single-Input, Single-Cell Switchmode Li-Ion Battery Charger

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Functional Block Diagram (continued)
PMID
IN
VDPM
Not used in Boost
Mode
VIN_BOOST
VBOOST Amp
+
bq24266
SLUSBY5F – JUNE 2014 – REVISED AUGUST 2015
4.8-V
Reference
DRV
BOOT
Q1
DC-DC
Low Side Current
VBURST_ENT
+
Burst Mode Enter
CONVERTER
PWM LOGIC
AND
Limit Comparator
SW
Comparator
+
COMPENSATION
IBLIMIT
VDRV
Q2
VBURST_EXT
Burst Mode Exit
Comparator
PGND
VBOOSTSHRT
Boost Short Circuit
Comparator
VBOOSTOVP
VBOOST
OVP Comparator
SYS
VBAT
IUSB3
IUSB2
IUSB1
VBIAS
Battery Short Circuit
Battery SC
Comparator
+
ILIM(SUPP)
Mode
Decode
BAT
CHG
Digital Control
BGATE
PG
TS
Figure 8. Block Diagram in Boost Mode
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