Overview
The BQ25300RTER from Texas Instruments is a highly integrated standalone switch-mode battery charger designed for 1-cell Li-ion, Li-polymer, and LiFePO4 batteries. This charger is known for its high efficiency and ease of configuration, making it suitable for a variety of portable and battery-powered applications. It features a 1.2-MHz synchronous switch-mode buck charger, which ensures high charge efficiency and low component count. The device can operate with an input voltage range of 4.1V to 17V and supports a fast charge current of up to 3.0A. The BQ25300RTER also includes various safety features such as thermal regulation, input under-voltage lockout (UVLO), over-voltage protection (OVP), and battery overcharge protection, ensuring reliable and safe charging operations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.1 to 17 | V |
| Maximum Fast Charge Current | 3.0 | A |
| Charge Voltage Regulation | ±0.5% | |
| Charge Current Regulation | ±10% | |
| Operating Junction Temperature | -40 to 150 | °C |
| Storage Temperature | -65 to 150 | °C |
| Package Type | WQFN (3x3) | |
| Number of Pins | 16 | |
| Quiescent Current | 200 nA |
Key Features
- High-efficiency, 1.2-MHz synchronous switch-mode buck charger
- Integrated current sensing topology for high charge efficiency and low BOM cost
- Low quiescent current of 200 nA to conserve battery energy
- Thermal regulation and thermal shutdown for high power operation or high ambient temperature conditions
- 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
- Pin open and short protection for charge current setting pin ICHG
- STAT pin output for reporting charging status and fault conditions
- Automatic charging cycle termination and restart based on battery voltage
Applications
- Wireless speakers
- Barcode scanners
- Gaming devices
- Cradle chargers
- Cordless power tools
- Building automation systems
- Medical devices
Q & A
- What type of batteries does the BQ25300RTER support?
The BQ25300RTER supports 1-cell Li-ion, Li-polymer, and LiFePO4 batteries.
- What is the input voltage range of the BQ25300RTER?
The input voltage range is from 4.1V to 17V.
- What is the maximum fast charge current of the BQ25300RTER?
The maximum fast charge current is 3.0A.
- How is the charge voltage set on the BQ25300RTER?
The charge voltage is set by an external resistor connected to the VSET pin.
- What safety features does the BQ25300RTER include?
The device includes thermal regulation, UVLO, OVP, battery overcharge protection, and safety timers for precharge and fast charge.
- How does the BQ25300RTER indicate charging status?
The charging status is indicated by the STAT pin, which can be LOW for charging in progress, HIGH for charge completed or disabled, or BLINKING for fault conditions.
- What is the package type and size of the BQ25300RTER?
The device is available in a 3x3 mm WQFN package with 16 pins.
- What is the operating junction temperature range of the BQ25300RTER?
The operating junction temperature range is from -40°C to 150°C.
- Does the BQ25300RTER have any specific thermal metrics?
Yes, it includes junction-to-ambient thermal resistance (RθJA) of 45.8 °C/W and other thermal metrics.
- What are some typical applications of the BQ25300RTER?
Typical applications include wireless speakers, barcode scanners, gaming devices, cradle chargers, cordless power tools, building automation systems, and medical devices.
