BQ24266_15 Datasheet, PDF (1/41 Pages) Texas Instruments – bq24266 3A, 30V Standalone Single-Input, Single-Cell Switchmode Li-Ion Battery Charger

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bq24266
SLUSBY5F – JUNE 2014 – REVISED AUGUST 2015
bq24266 3A, 30V Standalone Single-Input, Single-Cell Switchmode Li-Ion Battery Charger
1 Features
•1 Charge Time Optimizer (Enhanced CC/CV
Transition) for Faster Charging
• Integrated FETs for Up to 3A Charge Rate at 5%
Accuracy and 93% Peak Efficiency
• Boost Capability to Supply 5V at 1A at IN for USB
OTG Supply
• Integrated 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 4mm x 4mm QFN-24
Package
• Safe and Accurate Battery Management
Functions Programmed Using IUSB and /CE
– Input Current Limit and V_{IN_DPM} Threshold
– Thermal Regulation Protection for Input
Current Control
– Thermal Shutdown and Protection
2 Applications
• Handheld Scanner and Point of Sale Terminals
• Handheld Products
• Power Banks and External Battery Packs
• Small Power Tools
• Portable Media Players and Gaming
3 Description
The bq24266 is highly integrated single cell Li-Ion
battery charger and system power path management
devices that supports operation from either a USB
port or wall adapter supply. The power path feature
allows the bq24266 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. To support USB OTG applications, the
bq24266 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)
bq24266
VQFN (24)
4.00mm × 4.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Application Schematic
IN
VBUS
D+
D-
GND
4.7µ F
1.5µ H
SW
1µ F
26.7kŸ
PGND
PMID
VDPM
BOOT
SYS
BGATE
0.033µ F
10µ F
>10µ F
System
Load
10kŸ
DRV
BAT
TS
1µ F
VDRV
5.62kŸ
TEMP
PACK+
HOST
2.2µ F
bq24266 ^ISET
12.4kŸ
PACK-
400Ÿ
PG
1.5kŸ
CHG
1.5kŸ
CE
IUSB1
IUSB2
GPIO
GPIO
GPIO
GPIO
IUSB3
GPIO
1
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.