Overview
The BQ25895RTWT is a highly-integrated 5-A switch-mode battery charge management and system power path management device designed by Texas Instruments. It is optimized for single cell Li-Ion and Li-polymer batteries, supporting high input voltage fast charging. The device features a low impedance power path that enhances switch-mode operation efficiency, reduces battery charging time, and extends battery life during the discharging phase. The BQ25895RTWT includes an I2C serial interface for flexible charging and system settings, making it a versatile solution for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | WQFN (RTW), 24 pins |
| Operating Temperature Range | -40°C to 85°C |
| Input Voltage Range | 3.9 V to 14 V |
| Charge Current | Up to 5 A |
| Boost Current | Up to 3.1 A |
| Boost Frequency | Selectable 500 kHz to 1.5 MHz |
| Charge Efficiency | 93% at 2 A, 91% at 3 A |
| Boost Efficiency | 93% at 5 V, 1 A output |
| Input Current Limit | 100 mA to 3.25 A with 50 mA resolution |
| Thermal Regulation | Thermal shutdown and regulation |
| Battery Temperature Sensing | For charge and boost mode |
Key Features
- High efficiency 5-A, 1.5-MHz switch mode buck charge with up to 93% charge efficiency at 2 A and 91% at 3 A.
- Low Power PFM Mode for light load operations.
- Boost Mode operation with adjustable output from 4.5 V to 5.5 V and up to 3.1 A output.
- Integrated control to switch between charge and Boost Mode.
- Single input to support USB input and adjustable high voltage 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.
Applications
- Power banks.
- Mobile Wi-Fi hotspots.
- Wireless Bluetooth speakers.
- Portable internet devices.
Q & A
- What is the BQ25895RTWT used for?
The BQ25895RTWT 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 BQ25895RTWT?
The maximum charge current is up to 5 A.
- What is the input voltage range of the BQ25895RTWT?
The input voltage range is from 3.9 V to 14 V.
- Does the BQ25895RTWT support boost mode?
- What is the efficiency of the BQ25895RTWT in charge mode?
The charge efficiency is up to 93% at 2 A and 91% at 3 A.
- Does the BQ25895RTWT have thermal regulation?
- How does the BQ25895RTWT manage battery temperature?
- What is the purpose of the I2C interface in the BQ25895RTWT?
- What are some common applications of the BQ25895RTWT?
- Does the BQ25895RTWT support USB input and high voltage adapters?
