Overview
The BQ25302RTER is a highly-integrated standalone switch-mode battery charger designed by Texas Instruments for single cell Li-Ion and Li-polymer batteries. This device is optimized for high-efficiency charging, supporting input voltages from 4.1-V to 6.2-V and delivering up to 2-A continuous fast charge current. The BQ25302RTER is notable for its ease of configuration, high charge efficiency, and low quiescent current, making it ideal for portable devices where space and power efficiency are critical.
Key Specifications
| Specification | Value |
|---|---|
| Package | WQFN-16 (3x3 mm) |
| Operating Temperature Range | -40°C to 85°C |
| Input Voltage Range | 4.1-V to 6.2-V (28-V absolute maximum) |
| Maximum Fast Charge Current | 2.0-A |
| Low Battery Leakage Current | 200-nA at 4.5-V VBAT |
| VBUS Supply Current in IC Disable Mode | 4-µA |
| Charge Voltage Regulation | ±0.5% |
| Charge Current Regulation | ±10% |
| Switching Frequency | 1.2-MHz |
| Charge Efficiency | 94.3% at 1A from 5-V input |
Key Features
- Standalone charger with easy configuration
- High-efficiency, 1.2-MHz, synchronous switch-mode buck charger
- Integrated reverse-blocking FET (RBFET), high-side switching FET (HSFET), and low-side switching FET (LSFET)
- Internal input and charge current sense
- Internal loop compensation and integrated bootstrap diode
- Support for 4.1-V, 4.2-V, 4.35-V, and 4.4-V charge voltages
- Thermal regulation and thermal shutdown
- Input Under-Voltage Lockout (UVLO) and Over-Voltage Protection (OVP)
- Battery overcharge protection and safety timer for precharge and fast charge
- Cold/hot battery temperature protection and fault report on STAT pin
Applications
- Wireless speakers
- Barcode scanners
- Gaming devices
- Cradle chargers
- Cordless power tools
- Building automation systems
- Medical devices
- Portable electronics and power banks
- Handheld devices and industrial equipment
Q & A
- What is the BQ25302RTER used for?
The BQ25302RTER is a standalone switch-mode battery charger for single cell Li-Ion and Li-polymer batteries. - What is the input voltage range of the BQ25302RTER?
The input voltage range is 4.1-V to 6.2-V with a 28-V absolute maximum input voltage rating. - What is the maximum fast charge current of the BQ25302RTER?
The maximum fast charge current is 2.0-A. - What are the safety features of the BQ25302RTER?
The device includes thermal regulation, thermal shutdown, input UVLO and OVP, battery overcharge protection, safety timer, and cold/hot battery temperature protection. - How is the charge voltage set on the BQ25302RTER?
The charge voltage is set by external resistors connected to the VSET pin. - What is the quiescent current of the BQ25302RTER in IC disable mode?
The VBUS supply current in IC disable mode is 4-µA. - Does the BQ25302RTER require host control for charging?
No, the BQ25302RTER initiates and completes the charging cycle without host control. - What is the switching frequency of the BQ25302RTER?
The switching frequency is 1.2-MHz. - How does the BQ25302RTER handle battery temperature monitoring?
The device includes battery temperature monitoring based on a negative temperature coefficient (NTC) thermistor. - What is the package type and size of the BQ25302RTER?
The BQ25302RTER is available in a 3x3 mm WQFN-16 package.
