1 Features

• 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 Nonstandard

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

• 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 Lipolymer

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.