Overview
The BQ24630RGET from Texas Instruments is a highly integrated, standalone synchronous switched-mode lithium phosphate battery charger. This device is designed to provide high-accuracy voltage and current regulation, making it suitable for a wide range of applications including power tools, personal digital assistants, handheld terminals, and industrial and medical equipment. The BQ24630RGET features a constant-frequency synchronous switching converter with internal loop compensation, automatic system power selection, and dynamic power management. It supports an input voltage range of 5-V to 28-V and can charge up to 7 lithium phosphate battery cells.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 5 | - | 28 | V |
| Input Overvoltage Protection | - | - | 32 | V |
| Maximum Battery Charging Current | - | - | 10 | A |
| Switching Frequency | 255 | 300 | 345 | kHz |
| Charge Voltage Accuracy | -0.5% | - | 0.5% | % |
| Charge Current Accuracy | -3% | - | 3% | % |
| Quiescent Current (Off-State) | - | - | 1.5 | mA |
| Package Type | - | - | 24-Pin VQFN (4x4 mm) | - |
| Junction Temperature Range | -40 | - | 155 | °C |
Key Features
- 300-kHz NMOS-NMOS synchronous buck converter
- High-accuracy voltage and current regulation: ±0.5% charge voltage accuracy, ±3% charge current accuracy
- Automatic system power selection from adapter or battery
- Internal loop compensation and soft start
- Dynamic power management (DPM)
- Safety protections: input overvoltage, battery overvoltage, overcurrent, short protection, thermal shutdown
- Programmable charge timer and termination current
- 6-V gate drive for synchronous buck converter
- Low quiescent current: < 15 μA off-state battery discharge current, < 1.5 mA off-state input quiescent current
Applications
- Power tools and portable equipment
- Personal digital assistants (PDAs) and handheld terminals
- Industrial and medical equipment
- Netbooks, mobile internet devices, and ultra-mobile PCs
- Other battery-powered devices requiring high-efficiency and accurate charging
Q & A
- What is the input voltage range of the BQ24630RGET?
The input voltage range is 5-V to 28-V. - What is the maximum battery charging current of the BQ24630RGET?
The maximum battery charging current is 10 A. - What is the switching frequency of the BQ24630RGET?
The switching frequency is 300 kHz (typical), ranging from 255 kHz to 345 kHz. - What are the safety protections included in the BQ24630RGET?
The device includes input overvoltage protection, battery overvoltage protection, overcurrent protection, short protection, and thermal shutdown. - How accurate is the charge voltage regulation of the BQ24630RGET?
The charge voltage accuracy is ±0.5%. - What is the quiescent current of the BQ24630RGET in off-state?
The off-state quiescent current is less than 1.5 mA. - What package type is the BQ24630RGET available in?
The device is available in a 24-Pin VQFN (4x4 mm) package. - What is the junction temperature range of the BQ24630RGET?
The junction temperature range is -40°C to 155°C. - Does the BQ24630RGET support dynamic power management?
Yes, it supports dynamic power management (DPM). - How does the BQ24630RGET handle charge termination?
The device terminates the charge cycle when the current reaches a minimum user-selectable level, and it includes a programmable charge timer for safety.
