BQ28550DRZR

Product Overview

Category

BQ28550DRZR belongs to the category of integrated circuits (ICs) specifically designed for battery management systems.

Use

This product is primarily used for monitoring and protecting lithium-ion batteries in various applications, such as electric vehicles, portable electronics, and renewable energy systems.

Characteristics

• High accuracy battery voltage and temperature monitoring
• Overvoltage and undervoltage protection
• Overcurrent protection
• Short circuit protection
• Integrated cell balancing functionality
• Low power consumption
• Wide operating temperature range

Package

BQ28550DRZR is available in a small outline package (SOP) with 16 pins. The package provides excellent thermal performance and ease of integration into different electronic systems.

Essence

The essence of BQ28550DRZR lies in its ability to ensure the safe and efficient operation of lithium-ion batteries by accurately monitoring their voltage and temperature, while also providing essential protection features.

Packaging/Quantity

This product is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Cell Voltage Measurement Accuracy: ±10mV
• Temperature Measurement Accuracy: ±1°C
• Overvoltage Threshold: Configurable (default: 4.2V)
• Undervoltage Threshold: Configurable (default: 2.7V)
• Overcurrent Threshold: Configurable (default: 10A)

Detailed Pin Configuration

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: I2C data line
4. SCL: I2C clock line
5. ALERT: Interrupt output
6. BAT: Battery voltage input
7. TS: Temperature sense input
8. CB1: Cell balancing control output for cell 1
9. CB2: Cell balancing control output for cell 2
10. CB3: Cell balancing control output for cell 3
11. CB4: Cell balancing control output for cell 4
12. CB5: Cell balancing control output for cell 5
13. CB6: Cell balancing control output for cell 6
14. CB7: Cell balancing control output for cell 7
15. CB8: Cell balancing control output for cell 8
16. CB9: Cell balancing control output for cell 9

Functional Features

• Accurate monitoring of battery voltage and temperature
• Overvoltage and undervoltage protection to prevent damage to the battery
• Overcurrent protection to safeguard against excessive current flow
• Short circuit protection for enhanced safety
• Integrated cell balancing functionality to equalize cell voltages
• Low power consumption for energy efficiency
• I2C interface for easy communication with microcontrollers or host systems

Advantages and Disadvantages

Advantages

• High accuracy measurements ensure reliable battery monitoring
• Comprehensive protection features enhance battery safety
• Integrated cell balancing reduces the risk of cell degradation
• Wide operating temperature range allows for versatile applications
• Low power consumption prolongs battery life

Disadvantages

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

Working Principles

BQ28550DRZR operates by continuously monitoring the battery voltage and temperature using its internal ADC (Analog-to-Digital Converter). It compares these values with user-configurable thresholds to trigger appropriate protection actions, such as disconnecting the load or activating the cell balancing function. The device communicates with a microcontroller or host system through the I2C interface, providing real-time battery status information.

Detailed Application Field Plans

BQ28550DRZR finds extensive application in various fields, including: - Electric vehicles (EVs) and hybrid electric vehicles (HEVs) - Portable electronics, such as smartphones and tablets - Energy storage systems for renewable energy sources - Uninterruptible power supplies (UPS) - Medical devices relying on rechargeable batteries

Detailed and Complete Alternative Models

1. BQ76940: A similar IC with enhanced cell balancing capabilities and support for larger battery packs.
2. LTC6804: Offers multi-cell battery monitoring and balancing functionality with high accuracy measurements.
3. MAX14920: Provides comprehensive battery management features, including voltage, current, and temperature monitoring, along with cell balancing.

These alternative models offer different features and specifications to cater to specific application requirements.

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