BQ25895_16 Datasheet, PDF (1/67 Pages) Texas Instruments – Adjustable Voltage 3.1-A Boost Operation

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bq25895
SLUSC88A – MARCH 2015 – REVISED MAY 2016
bq25895 I²C Controlled Single Cell 5-A Fast Charger with MaxCharge^TM for High Input
Voltage and Adjustable Voltage 3.1-A Boost Operation
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 to 12 V)
– Low Power PFM mode for Light Load
Operations
• Boost Mode Operation with Adjustable Output
from 4.5 V to 5.5 V
– Selectable 500-KHz to 1.5-MHz Boost
Converter with up to 3.1-A Output
– 93% Boost Efficiency at 5 V at 1 A Output
• Integrated Control to Switch Between Charge and
Boost Mode
• 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
• 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
1
• 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
• Power Bank, Mobile Wi-Fi Hotspot
• Wireless Bluetooth Speaker
• Portable Internet Devices
3 Description
The bq25895 is a 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)
bq25895
WQFN (24)
4.00mm x 4.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
USB
Simplified Schematic
Input
3.9V±14V at 3A
VBUS
OTG
5V at 3.1A
PMID
Phone
SYS 3.5V±4.5V
SW
Host
I2C Bus
Host Control
SYS
BAT
QON
bq25895 ^REGN
TS
Ichg = 5A
Optional
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.