Overview
The BQ24650RVAR from Texas Instruments is a highly integrated standalone synchronous buck battery charge controller designed for solar-powered applications. It features Maximum Power Point Tracking (MPPT) capability, which optimizes the power output from solar panels by adjusting the charge current based on the input voltage. This device supports a wide range of battery chemistries including Li-Ion/Polymer, LiFePO4, and lead acid. The BQ24650RVAR operates with high accuracy in current and voltage regulation, ensuring efficient and safe battery charging.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 5 V to 28 V | V |
| Operating Temperature Range | -40°C to 125°C | °C |
| Switching Frequency | 600 kHz | kHz |
| Charge Voltage Regulation Accuracy | ±0.5% | % |
| Charge Current Regulation Accuracy | ±3% | % |
| Input Voltage Regulation Accuracy | ±0.6% | % |
| Package Type | 16-pin, 3.5 mm × 3.5 mm QFN | - |
| Off-state Battery Discharge Current | < 15 µA | µA |
Key Features
- Maximum Power Point Tracking (MPPT) capability by input voltage regulation
- Programmable MPPT setting
- Accommodates Li-Ion/Polymer, LiFePO4, and lead acid battery chemistries
- High accuracy current and voltage regulation
- Internal loop compensation and digital soft start
- Safety features: input overvoltage protection, battery temperature-sensing, battery absent detection, and thermal shutdown
- Charge status outputs for LED or host processor
- Automatic sleep mode for low power consumption
Applications
- Solar-powered applications
- Remote monitoring stations
- Portable handheld instruments
- 12-V to 24-V Automotive systems
- Current-limited power source
Q & A
- What is the input voltage range of the BQ24650RVAR?
The input voltage range is from 5 V to 28 V.
- What types of battery chemistries does the BQ24650RVAR support?
The device supports Li-Ion/Polymer, LiFePO4, and lead acid battery chemistries.
- What is the switching frequency of the BQ24650RVAR?
The switching frequency is 600 kHz.
- How accurate is the charge voltage regulation of the BQ24650RVAR?
The charge voltage regulation accuracy is ±0.5%.
- What safety features are included in the BQ24650RVAR?
The device includes input overvoltage protection, battery temperature-sensing, battery absent detection, and thermal shutdown.
- How does the BQ24650RVAR optimize power output from solar panels?
The device uses Maximum Power Point Tracking (MPPT) to optimize power output by adjusting the charge current based on the input voltage.
- What is the package type and size of the BQ24650RVAR?
The device is available in a 16-pin, 3.5 mm × 3.5 mm QFN package.
- What is the off-state battery discharge current of the BQ24650RVAR?
The off-state battery discharge current is less than 15 µA.
- How does the BQ24650RVAR manage charge cycles?
The device charges the battery in three phases: pre-conditioning, constant current, and constant voltage. It also automatically restarts the charge cycle if the battery voltage falls below an internal threshold.
- What are some typical applications of the BQ24650RVAR?
Typical applications include solar-powered systems, remote monitoring stations, portable handheld instruments, and automotive systems.
