BQ25892_15 Datasheet, PDF (1/11 Pages) Texas Instruments – bq25890/2 I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage USB On-the-Go Boost Mode

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bq25890, bq25892
SLUSC86A – MARCH 2015 – REVISED JUNE 2015
bq25890/2 I²C Controlled Single Cell 5-A Fast Charger with MaxCharge^TM Technology for
High Input Voltage and Adjustable Voltage USB On-the-Go Boost Mode
1 Features
•1 High Efficiency 5-A, 1.5-MHz Switch Mode Buck
Charge
– 93% Charge Efficiency at 2 A and 91% Charge
Efficiency at 3 A Charge Current
– Optimize for High Voltage Input (9 V / 12 V)
– Low Power PFM mode for Light Load
Operations
• USB On-the-Go (OTG) with Adjustable Output
from 4.5 V to 5.5 V
– Selectable 500-KHz / 1.5-MHz Boost
Converter with up-to 2.4 A Output
– 93% Boost Efficiency at 5 V at 1 A Output
– Accurate Hiccup Mode Overcurent Protection
• Single Input to Support USB Input and Adjustable
High Voltage Adapters
– Support 3.9-V to 14-V Input Voltage Range
– Input Current Limit (100 mA to 3.25 A with 50-
mA resolution) to Support USB2.0, USB3.0
standard and High Voltage Adapters
– Maximum Power Tracking by Input Voltage
Limit up-to 14V for Wide Range of Adapters
– Auto Detect USB SDP, CDP, DCP, and Non-
standard Adapters (bq25890)
• Input Current Optimizer (ICO) to Maximize Input
Power without Overloading Adapters
• Resistance Compensation (IRCOMP) from
Charger Output to Cell Terminal
• Highest Battery Discharge Efficiency with 11-mΩ
Battery Discharge MOSFET up to 9 A
• Integrated ADC for System Monitor
(Voltage, Temperature, Charge Current)
• Narrow VDC (NVDC) Power Path Management
– Instant-on Works with No Battery or Deeply
Discharged Battery
– Ideal Diode Operation in Battery Supplement
Mode
• BATFET Control to Support Ship Mode, Wake Up,
and Full System Reset
• Flexible Autonomous and I²C Mode for Optimal
System Performance
• High Integration includes all MOSFETs, Current
Sensing and Loop Compensation
• 12-µA Low Battery Leakage Current to Support
Ship Mode
• High Accuracy
– ±0.5% Charge Voltage Regulation
– ±5% Charge Current Regulation
– ±7.5% Input Current Regulation
• Safety
– Battery Temperature Sensing for Charge and
Boost Mode
– Thermal Regulation and Thermal Shutdown
2 Applications
• Smart Phone
• Tablet PC
• Portable Internet Devices
3 Description
The bq25890, bq25892 are highly-integrated 5-A
switch-mode battery charge management and system
power path management device for single cell Li-Ion
and Li-polymer battery. The devices support high
input voltage fast charging. The low impedance
power path optimizes switch-mode operation
efficiency, reduces battery charging time and extends
battery life during discharging phase. The I²C Serial
interface with charging and system settings makes
the device a truly flexible solution.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq25890
bq25892
WQFN (24)
4.00mm x 4.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
USB
Host
Input
3.9V±14V at 3A
OTG
5V at 2.4A
VBUS
I2C Bus
SW
SYS
BAT
QON
bq2589x ^REGN
Host Control
TS
SYS 3.5V±4.5V
Ichg = 5A
Optional
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.