Overview
The BQ25895MRTWR from Texas Instruments is a highly-integrated 5-A switch-mode battery charge management and system power path management device designed for single cell Li-Ion and Li-polymer batteries. This device supports high input voltage fast charging and features a low impedance power path to optimize switch-mode operation efficiency, reduce battery charging time, and extend battery life during the discharging phase. It includes an I2C serial interface for flexible charging and system settings, making it suitable for a wide range of portable devices such as smartphones, tablets, and other mobile equipment.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VBUS) | -2 | 22 | V | |
| Charge Current (Ichg) | 5 | A | ||
| System Voltage (VSYS) | 3.5 | 4.42 | V | |
| Input Current Regulation | 100 | 1500 | mA | |
| Charge Efficiency | 93% @ 2A, 91% @ 3A | % | ||
| Junction Temperature | -40 | 150 | °C | |
| Package Type | WQFN (24-pin) | |||
| Package Size | 4.00mm x 4.00mm x 0.75mm |
Key Features
- High efficiency 1.5-MHz switch mode buck charge with up to 93% charge efficiency at 2 A and 91% at 3 A.
- 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 monitoring (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.
- Low battery leakage current of 12 µA to support ship mode.
- High accuracy: ±0.5% charge voltage regulation, ±5% charge current regulation, and ±7.5% input current regulation.
- Safety features: battery temperature sensing, thermal regulation, and thermal shutdown.
Applications
- Power Banks
- Mobile Wi-Fi Hotspots
- Wireless Bluetooth Speakers
- Portable Internet Devices
Q & A
- What is the BQ25895MRTWR used for? The BQ25895MRTWR 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 BQ25895MRTWR? The maximum charge current is 5 A.
- What is the efficiency of the charger at 2 A and 3 A charge currents? The charger has an efficiency of up to 93% at 2 A and 91% at 3 A.
- Does the BQ25895MRTWR support I2C communication? Yes, it supports I2C serial interface for charging and system settings.
- What safety features does the BQ25895MRTWR include? It includes battery temperature sensing, thermal regulation, and thermal shutdown, as well as overvoltage and overcurrent protections.
- What is the package type and size of the BQ25895MRTWR? The package type is WQFN (24-pin) and the size is 4.00mm x 4.00mm x 0.75mm.
- What is the junction temperature range of the BQ25895MRTWR? The junction temperature range is -40°C to 150°C.
- Does the BQ25895MRTWR have integrated ADC for system monitoring? Yes, it includes an integrated ADC for monitoring voltage, temperature, and charge current.
- What are some typical applications of the BQ25895MRTWR? Typical applications include power banks, mobile Wi-Fi hotspots, wireless Bluetooth speakers, and portable internet devices.
- How does the BQ25895MRTWR manage system power during battery depletion? The power path management regulates the system slightly above battery voltage and reduces charge current to zero when the input current or voltage limit is reached, preventing overloading of the input source.
