BQ24188_15 Datasheet, PDF (1/52 Pages) Texas Instruments – bq24188 2A, 30V, Host-Controlled Single-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path Management and USB-OTG Support

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bq24188
SLUSC44A – DECEMBER 2014 – REVISED MAY 2015
bq24188 2A, 30V, Host-Controlled Single-Input, Single Cell Switchmode Li-Ion Battery
Charger with Power Path Management and USB-OTG Support
1 Features
•1 Charge Time Optimizer (Enhanced CC/CV
Transition) for Faster Charging
• Integrated FETs for Up to 2A Charge Rate at 5%
Accuracy and 93% Peak Efficiency
• Boost Capability to Supply 5V at 1A at IN for USB
OTG Supply
• Integrated 17mΩ Power Path MOSFET and
optional BGATE control to Maximize Battery Life
and Instantly Startup From a Deeply Discharged
Battery or No Battery
• 30V Input Rating with Over-Voltage Protection
Supports 5V USB2.0/3.0 and 12V USB Power
Delivery
• Small Solution Size In a 2.4mm x 2.4mm 36-ball
WCSP or 4mm x 4mm QFN-24 Package
– Total Charging Solution Can be 50mm² or less
with WCSP
• Safe and Accurate Battery Management
Functions Programmed Using I²C Interface
– Charge Voltage, Current, Termination
Threshold, Input Current Limit, V_{IN_DPM}
Threshold
– Voltage-based, JEITA Compatible NTC
Monitoring Input
– Thermal Regulation Protection for Input
Current Control
– Thermal Shutdown and Protection
2 Applications
• Smartphone and Tablets
• Handheld Products
• Power Banks and External Battery Packs
• Small Power Tools
• Portable Media Players and Gaming
3 Description
The bq24188 is a highly integrated single cell Li-Ion
battery charger and system power path management
device that supports operation from either a USB port
or wall adapter supply. The power path feature allows
the bq24188 to power the system from a high
efficiency DC to DC converter while simultaneously
and independently charging the battery. The power
path also permits the battery to supplement the
system current requirements when the adapter
cannot. Many features are programmable using the
I2C interface. To support USB OTG applications, the
bq24188 is configurable to boost the battery voltage
to 5V and supply up to 1A at the input. The battery is
charged with three phases: precharge, constant
current and constant voltage. Thermal regulation
prevents the die temperature from exceeding 125°C.
Additionally, a JEITA compatible battery pack
thermistor monitoring input (TS) is included to prevent
the battery from charging outside of its safe
temperature range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24188
DSBGA (36)
2.40 mm × 2.40 mm
bq24188
QFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Application Schematic
VBUS
D+
D-
GND
HOST
V I/O
IN
PGND
PMID
D+
D-
CD
SDA
SCL
INT
SW
BOOT
`
SYS
`
BAT
bq24188
TS
VDRV
System
Load
TEMP
PACK+
PACK-
1
Charge Time Optimizer Effect
Charge Cycle 4000mAh Battery 2A Charge Rate
4.4
3
4.2
2.5
4
3.8
More Energy
2
3.6
Delivered to
the Battery
in the Same
3.4
Time
1.5
3.2
1
3
2.8
0.5
2.6
2.4
0
2000
VBAT_CTO
4000
6000
8000
Time (sec)
VBAT_Traditional IBAT_CTO
0
10000 11000
IBAT_Traditional
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.