BQ24298_15 Datasheet, PDF (1/51 Pages) Texas Instruments – bq24298 I2C Controlled 3A Single Cell USB Charger With Narrow VDC Power Path Management and Adjustable Voltage USB OTG

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bq24298
SLUSC59 – APRIL 2015
bq24298 I²C Controlled 3A Single Cell USB Charger With Narrow VDC
Power Path Management and Adjustable Voltage USB OTG
1 Features
• 90% High Efficiency Switch Mode 3-A Charger
• 3.9-V to 6.2-V Single Input USB-Compliant
Charger with 6.4-V Over-Voltage Protection
– Input voltage and current limit supports USB
2.0 and USB 3.0
– Input Current Limit: 100 mA, 150 mA, 500 mA,
900 mA, 1 A, 1.5 A, 2 A, and 3 A
• USB OTG with Adjustable output 4.55 V to 5.5 V
at 1 A or 1.5 A
– Fast OTG Startup (22 ms Typ)
– 90% 5-V Boost Mode Efficiency
– Accurate ±15% Hiccup Mode Overcurrent
Protection
• Narrow VDC (NVDC) Power Path Management
– Instant System On with No Battery or Deeply
Discharged Battery
– Ideal Diode Operation in Battery Supplement
Mode
• 1.5-MHz Switching Frequency for Low Profile 1.2-
mm Inductor
• I²C port for optimal system performance and
status reporting
• Autonomous Battery Charging with or without
Host Management
– Battery Charge Enable
– Battery Charge Preconditioning
– Charge Termination and Recharge
• High Accuracy
– ±0.5% Charge Voltage Regulation
– ±7% Charge Current Regulation
– ±7.5% Input Current Regulation
– ±3% Output Voltage Regulation in USB OTG
Boost Mode
• High Integration
– Power Path Management
– Synchronous Switching MOSFETs
– Integrated Current Sensing
– Bootstrap Diode
– Internal Loop Compensation
• Safety
– Battery Temperature Sensing for Charging and
Discharging in OTG Mode
– Battery Charging Safety Timer
1
– Thermal Regulation and Thermal Shutdown
– Input and System Over-Voltage Protection
– MOSFET Over-Current Protection
• Charge Status Outputs for LED or Host Processor
• Maximum power tracking capability by input
voltage regulation
• 20-µA Low Battery Leakage Current and Support
Shipping Mode and System Reset
• I²C Forced BATFET Off with Delay (9 s Typ)
• 4.00-mm x 4.00-mm WQFN-24 Package
2 Applications
• Tablet PC, Smart Phone, Internet Devices
• Portable Audio Speaker
3 Description
The bq24298 is a highly-integrated switch-mode
battery charge management and system power path
management device for 1 cell Li-Ion and Li-polymer
battery in a wide range of smart phone and tablet
applications. Its low impedance power path optimizes
switch-mode operation efficiency, reduces battery
charging time and extends battery life during
discharging phase.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24298
WQFN (24)
4.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
PSEL from PHY, Charging from SDP/DCP, and
Optional BATFET Enable Interface
5V USB
SDP/DCP
bq24298
1μF
8.2μF
VBUS
PMID
317W (1.5A max)
ILIM
SYS
SW
BOOT
REGN
PGND
VREF
2.2kW
PG
STAT
10kW 10kW 10kW
SDA
Host
SCL
INT
OTG
CE
SYS
BAT
QON
TS
1μH
47nF
4.7μF
SYS: 3.5V-4.35V
10μF 10μF
10μF
4.2V
REGN
5.25kW
PHY
PSEL
Thermal Pad
31.23kW
10kW
Charge Enable (0°C - 45°C)
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. PRODUCTION DATA.