Overview
The BQ25895RTWR is a highly-integrated 5-A switch-mode battery charge management and system power path management device designed by Texas Instruments. It is specifically tailored for single-cell Li-Ion and Li-polymer batteries. The device supports high input voltage fast charging, optimizing switch-mode operation efficiency, reducing battery charging time, and extending battery life during the discharging phase. It features an I2C serial interface for charging and system settings, making it a flexible solution for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | WQFN (24 pins) |
| Operating Temperature Range | -40°C to 85°C |
| Charge Current | Up to 5 A |
| Boost Current | Up to 3.1 A |
| Input Voltage Range | 3.9 V to 14 V |
| Input Current Limit | 100 mA to 3.25 A (with 50-mA resolution) |
| Charge Efficiency | 93% at 2 A, 91% at 3 A |
| Boost Efficiency | 93% at 5 V, 1 A output |
| Switching Frequency | 500 kHz to 1.5 MHz |
| Battery Discharge MOSFET | 11-mΩ, up to 9 A |
| Low Battery Leakage Current | 12 µA |
| Charge Voltage Regulation | ±0.5% |
| Charge Current Regulation | ±5% |
| Input Current Regulation | ±7.5% |
Key Features
- High efficiency 5-A, 1.5-MHz switch-mode buck charge
- Optimized 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
- Integrated control to switch between charge and Boost Mode
- Single input to support USB input and adjustable high voltage 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
- 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
- Battery temperature sensing for charge and Boost Mode
- Thermal regulation and thermal shutdown
Applications
- Power banks
- Mobile Wi-Fi hotspots
- Wireless Bluetooth speakers
- Portable internet devices
Q & A
- What is the BQ25895RTWR used for?
The BQ25895RTWR is used for battery charge management and system power path management in single-cell Li-Ion and Li-polymer battery applications.
- What is the maximum charge current of the BQ25895RTWR?
The maximum charge current is up to 5 A.
- What is the input voltage range of the BQ25895RTWR?
The input voltage range is from 3.9 V to 14 V.
- Does the BQ25895RTWR support USB charging?
Yes, it supports USB 2.0 and USB 3.0 power specifications and can detect various USB charging ports.
- What is the efficiency of the BQ25895RTWR at 2 A charge current?
The charge efficiency is 93% at 2 A charge current.
- Does the BQ25895RTWR have thermal protection?
Yes, it includes thermal regulation and thermal shutdown features.
- What is the switching frequency range of the BQ25895RTWR?
The switching frequency range is from 500 kHz to 1.5 MHz.
- Is the BQ25895RTWR compliant with RoHS?
Yes, it is RoHS compliant.
- What is the package type of the BQ25895RTWR?
The package type is WQFN (24 pins).
- Does the BQ25895RTWR support I2C communication?
Yes, it supports I2C serial interface for charging and system settings.
