Overview
The BQ25306RTER is a highly integrated battery charger and power path management IC designed by Texas Instruments. It is specifically tailored for single-cell Li-Ion or Li-Polymer battery applications, making it an ideal choice for portable electronic devices, wearables, and IoT applications. This IC offers a complete charging solution with integrated power elements and intelligent charging features to optimize charging efficiency and provide comprehensive protection for the battery and system.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.1 to 17 | V |
| Charge Current | Up to 3 | A |
| Charge Voltage Range | 3.4 to 9.0 | V |
| Package Type | WQFN-16 (3x3) | - |
| Operating Temperature Range | -40 to 85 | °C |
| Low Battery Leakage Current | 200 nA | - |
| Charge Accuracy | ±0.5% (voltage), ±10% (current) | - |
| Safety Features | Thermal regulation, over-voltage protection, over-current protection, battery overcharge protection | - |
Key Features
- High-Efficiency Charging: The BQ25306RTER features a 1.2-MHz synchronous switch-mode buck charger, ensuring high charge efficiency and minimizing power loss.
- Integrated Current Sensing: Lossless integrated current sensing reduces BOM cost and minimizes component count.
- Programmable Charging: Charge current and voltage can be set using external resistors, offering flexible design options.
- Comprehensive Safety Features: Includes thermal regulation, input under-voltage lockout, over-voltage protection, battery overcharge protection, and charge safety timers.
- Compact Package: Available in a 3x3 mm WQFN package, suitable for space-limited applications.
- Charge Status Monitoring: Provides charge status output on the STAT pin for monitoring charging status and fault conditions.
Applications
- Portable Electronic Devices: Ideal for charging and power management in smartphones, tablets, and other portable devices.
- Wearable Devices: Suitable for battery charging and power path management in smartwatches, fitness trackers, and other wearable devices.
- IoT Applications: Used in Internet of Things (IoT) devices requiring efficient battery charging and power management.
- Wireless Speakers and Gaming Devices: Applicable in wireless speakers and gaming devices that require efficient and reliable battery charging.
- Medical Devices: Can be used in medical devices that need precise and safe battery charging solutions.
Q & A
- Q: Can the BQ25306RTER be used with Li-Polymer batteries?
A: Yes, the BQ25306RTER is compatible with both Li-Ion and Li-Polymer batteries.
- Q: What protection features does the BQ25306RTER offer?
A: The BQ25306RTER provides overvoltage, overcurrent, and overtemperature protection for the battery and system.
- Q: How does the BQ25306RTER work?
A: The BQ25306RTER works by providing a complete charging solution for single-cell lithium-ion batteries, incorporating voltage regulation, current regulation, and charge status monitoring.
- Q: What is the package type and size of the BQ25306RTER?
A: The BQ25306RTER is available in a 16-pin WQFN package with a size of 3x3 mm.
- Q: What are the key safety features of the BQ25306RTER?
A: Key safety features include thermal regulation, input under-voltage lockout, over-voltage protection, battery overcharge protection, and charge safety timers.
- Q: Can the BQ25306RTER be used for dual-cell batteries?
A: Yes, the BQ25306RTER supports charging for both single-cell and dual-cell Li-ion or Li-polymer batteries.
- Q: How is the charge current set in the BQ25306RTER?
A: The charge current can be set using an external programmable input (PROG) and resistors.
- Q: What is the maximum charge current of the BQ25306RTER?
A: The BQ25306RTER supports up to 3 A of continuous charge current.
- Q: Are there any equivalents or alternatives to the BQ25306RTER?
A: Alternatives include the BQ24075 from Texas Instruments, the MCP73831 from Microchip Technology, and the MAX1555 from Maxim Integrated.
- Q: How does the BQ25306RTER handle battery temperature monitoring?
A: The BQ25306RTER includes battery temperature monitoring based on a negative temperature coefficient (NTC) thermistor.
