BQ24190_15 Datasheet, PDF (36/52 Pages) Texas Instruments – bq2419x I2C Controlled 4.5-A Single Cell USB/Adapter Charger with Narrow VDC Power Path Management and USB OTG

bq24190, bq24192, bq24192I
SLUSAW5B – JANUARY 2012 – REVISED DECEMBER 2014
10 Application and Implementation
www.ti.com
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
A typical application consists of the device configured as an I²C controlled power path management device and a
single cell Li-Ion battery charger for single cell Li-Ion and Li-polymer batteries used in a wide range of tablets and
other portable devices. It integrates an input reverse-blocking FET (RBFET, Q1), high-side switching FET
(HSFET, Q2), low-side switching FET (LSFET, Q3), and BATFET (Q4) between the system and battery. The
device also integrates a bootstrap diode for the high-side gate drive.
10.2 Typical Application
5V USB SDP/DCP
USB
1μF
6.8μF
SYS
bq24190
VBUS
SW
PMID
BTST
D+
REGN
D–
PGND
1μH
47nF
4.7μF
SYS: 3.5V-4.35V
10μF 10μF 10μF 10μF
VREF
2.2kW
STAT
SYS
BAT
10kW 10kW 10kW
Host
SDA
ILIM
SCL
INT
OTG
CE
TS1
TS2
Power Pad
353W 10μF
(1.5A max)
REGN
5.52kW
31.23kW
10kW
(103-AT)
Figure 37. bq24190 with D+/D- Detection and USB On-The-Go (OTG)
36
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