Overview
The Texas Instruments BQ24125RHLR is a highly integrated Li-ion and Li-polymer switched-mode battery charger. It is part of the bqSWITCHER™ series, designed for a wide range of portable applications. This device features an integrated synchronous PWM controller and power FETs, providing high-accuracy current and voltage regulation. The BQ24125RHLR supports charging of 1-, 2-, or 3-cell battery packs and operates in three phases: conditioning, constant current, and constant voltage. It also includes various safety features such as thermal shutdown, reverse leakage protection, and battery temperature monitoring.
Key Specifications
| Parameter | Description |
|---|---|
| Package | VQFN-20 (3.5-mm × 4.5-mm) |
| Pins | 20 |
| Operating Temperature Range | -40°C to 125°C |
| Maximum Voltage Rating on IN and OUT Pins | 20 V |
| Charge Rate | Up to 2 A |
| PWM Frequency | 1.1 MHz |
| Voltage Regulation Accuracy | ±0.5% to ±1% |
| Current Regulation Accuracy | ±10% |
| RoHS Compliance | Yes |
Key Features
- Enhanced EMI performance
- Integrated power FETs for up to 2-A charge rate
- Suitable for 1-, 2-, or 3-cell Li-ion and Li-polymer battery packs
- Synchronous fixed-frequency PWM controller operating at 1.1 MHz with 0% to 100% duty cycle
- High-accuracy voltage and current regulation
- Status outputs for LED or host processor interface indicating charge-in-progress, charge completion, fault, and AC-adapter present conditions
- Accurate high-side battery current sensing
- Battery temperature monitoring
- Automatic sleep mode for low power consumption
- Reverse leakage protection to prevent battery drainage
- Thermal shutdown and protection
- Built-in battery detection
Applications
The BQ24125RHLR is designed for a wide range of portable applications, including but not limited to:
- Smartphones and tablets
- Laptops and notebooks
- Portable media players and gaming devices
- Wireless communication devices
- Other battery-powered consumer electronics
Q & A
- What is the BQ24125RHLR?
The BQ24125RHLR is a standalone 1-3 cell 2A synchronous Buck battery charger with enhanced EMI performance from Texas Instruments.
- What package type does the BQ24125RHLR come in?
The BQ24125RHLR comes in a 20-pin VQFN (RHL) package with dimensions of 3.5-mm × 4.5-mm.
- What is the operating temperature range of the BQ24125RHLR?
The operating temperature range is -40°C to 125°C.
- What is the maximum charge rate of the BQ24125RHLR?
The maximum charge rate is up to 2 A.
- Does the BQ24125RHLR support multiple cell configurations?
Yes, it supports 1-, 2-, or 3-cell Li-ion and Li-polymer battery packs.
- What safety features does the BQ24125RHLR include?
The device includes thermal shutdown, reverse leakage protection, and battery temperature monitoring.
- How does the BQ24125RHLR regulate charging?
The device charges the battery in three phases: conditioning, constant current, and constant voltage, with high-accuracy voltage and current regulation.
- Is the BQ24125RHLR RoHS compliant?
Yes, the BQ24125RHLR is RoHS compliant.
- What is the PWM frequency of the BQ24125RHLR?
The PWM frequency is 1.1 MHz.
- How does the BQ24125RHLR indicate charge status?
The device provides status outputs for LED or host processor interface indicating charge-in-progress, charge completion, fault, and AC-adapter present conditions.
