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DATA SHEET
BQ25895M I2C Controlled Single Cell Fast Charger with MaxChargeTM Technology for High Input Voltage and Adjustable Voltage 3.1 A Boost Operation
1 Features
- High efficiency 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
- Boost mode operation with adjustable
output from 4.5 V to 5.5 V
- Selectable 500-KHz /
1.5-MHz boost converter with up-to 3.1 A output
- 93% Boost efficiency at 5
V at 1 A output
- Support down-to 2.5V
battery
- Support PWM only or
PFM/PWM control for light load efficiency
- 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) - 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
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