BQ76925RGER

Product Overview

Category

BQ76925RGER belongs to the category of integrated circuits (ICs) used in battery management systems.

Use

This product is specifically designed for monitoring and protecting lithium-ion battery packs.

Characteristics

• Integrated circuit for battery management
• Monitors individual cell voltages and temperatures
• Provides overvoltage, undervoltage, and overtemperature protection
• Enables balancing of cell voltages
• Supports communication with a host microcontroller

Package

BQ76925RGER is available in a small 24-pin VQFN package.

Essence

The essence of BQ76925RGER lies in its ability to ensure the safe and efficient operation of lithium-ion battery packs by monitoring and protecting individual cells.

Packaging/Quantity

This product is typically sold in reels containing a specified quantity of ICs per reel. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating Voltage: 2.7V to 16V
• Cell Voltage Measurement Range: 0V to 5V
• Temperature Measurement Range: -40°C to +125°C
• Communication Interface: I2C
• Balancing Current: Up to 100mA per cell
• Fault Detection and Reporting: Overvoltage, undervoltage, overtemperature, and short circuit

Detailed Pin Configuration

1. VDD: Power supply voltage input
2. GND: Ground reference
3. SDA: I2C data line
4. SCL: I2C clock line
5. ALERT: Interrupt output indicating fault conditions
6. BAT: Battery pack positive terminal
7. VCxP: Positive terminal of cell x
8. VCxN: Negative terminal of cell x
9. VC1P: Positive terminal of cell 1
10. VC1N: Negative terminal of cell 1
11. VC2P: Positive terminal of cell 2
12. VC2N: Negative terminal of cell 2
13. VC3P: Positive terminal of cell 3
14. VC3N: Negative terminal of cell 3
15. VC4P: Positive terminal of cell 4
16. VC4N: Negative terminal of cell 4
17. VC5P: Positive terminal of cell 5
18. VC5N: Negative terminal of cell 5
19. VC6P: Positive terminal of cell 6
20. VC6N: Negative terminal of cell 6
21. VSS: Negative supply voltage input
22. BATGND: Battery pack ground reference
23. TS: Temperature sense input
24. VREF: Reference voltage output

Functional Features

• Cell voltage monitoring and balancing
• Temperature sensing and protection
• Fault detection and reporting
• I2C communication interface for easy integration with a host microcontroller
• Overvoltage and undervoltage protection for safe battery operation

Advantages and Disadvantages

Advantages

• Comprehensive battery management features
• High accuracy in cell voltage and temperature measurements
• Efficient cell balancing capability
• Compact package size for space-constrained applications
• Easy integration with a host microcontroller

Disadvantages

• Limited to lithium-ion battery pack applications
• Requires external components for complete battery management system implementation

Working Principles

BQ76925RGER operates by continuously monitoring the voltages and temperatures of individual cells within a lithium-ion battery pack. It compares these measurements against predefined thresholds to detect fault conditions such as overvoltage, undervoltage, and overtemperature. In case of a fault, it triggers an interrupt signal (ALERT pin) to notify the host microcontroller. The IC also supports cell balancing by diverting current from higher voltage cells to lower voltage cells, ensuring uniform charge levels.

Detailed Application Field Plans

BQ76925RGER finds applications in various fields where lithium-ion battery packs require efficient monitoring and protection. Some potential application areas include: - Electric vehicles - Portable electronic devices - Energy storage systems - Uninterruptible power supplies (UPS) - Solar power systems

Detailed and Complete Alternative Models

1. BQ76930RGRR: Similar functionality with additional support for up to 15 cells.
2. LTC6804-2: Multicell battery monitor with integrated balancing and communication capabilities.
3. MAX14920: Battery management IC with advanced diagnostics and fault protection features.

These alternative models offer similar functionalities to BQ76925RGER and can be considered based on specific application requirements.

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