BQ2004SNG4

Product Overview

Category

BQ2004SNG4 belongs to the category of battery charge management integrated circuits (ICs).

Use

This IC is primarily used for managing and controlling the charging process of rechargeable batteries.

Characteristics

• BQ2004SNG4 is a highly efficient and reliable battery charge management IC.
• It offers advanced features for accurate and safe battery charging.
• The IC is designed to work with various types of rechargeable batteries, including lithium-ion, nickel-cadmium, and lead-acid batteries.

Package

BQ2004SNG4 is available in a compact and industry-standard package, making it suitable for integration into various electronic devices.

Essence

The essence of BQ2004SNG4 lies in its ability to provide precise and controlled charging for rechargeable batteries, ensuring optimal performance and longevity.

Packaging/Quantity

This IC is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 28V
• Charging Current Range: 100mA to 2A
• Operating Temperature Range: -40°C to +85°C
• Integrated Safety Features: Overvoltage protection, overcurrent protection, thermal regulation, and short-circuit protection
• Communication Interface: I2C (Inter-Integrated Circuit) protocol

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. SDA: Serial data line for I2C communication
4. SCL: Serial clock line for I2C communication
5. BAT: Battery connection terminal
6. PROG: Programming pin for setting charging parameters
7. STAT: Status output pin indicating charging status
8. THERM: Temperature sensing input pin

Functional Features

• Accurate Battery Voltage and Current Monitoring
• Constant Current/Constant Voltage Charging Algorithm
• Programmable Charging Parameters
• Temperature Compensation for Optimal Charging
• Charge Termination based on Voltage, Current, or Time
• LED Indication for Charging Status
• Fault Detection and Reporting

Advantages and Disadvantages

Advantages

• High charging efficiency, leading to reduced charging time
• Wide input voltage range allows compatibility with various power sources
• Integrated safety features protect the battery and the charging circuitry
• Flexible programming options for customized charging profiles
• Compact package size enables easy integration into electronic devices

Disadvantages

• Requires additional external components for complete charging circuit implementation
• Limited to I2C communication interface, may not be compatible with all systems

Working Principles

BQ2004SNG4 operates based on a constant current/constant voltage charging algorithm. It continuously monitors the battery voltage and current during the charging process. The IC adjusts the charging current accordingly to maintain a constant current until the battery reaches a predefined voltage level. It then switches to a constant voltage mode to prevent overcharging. The charging process is terminated when specific conditions, such as voltage, current, or time thresholds, are met.

Detailed Application Field Plans

BQ2004SNG4 finds applications in various fields, including: 1. Portable electronic devices (e.g., smartphones, tablets) 2. Power tools and cordless appliances 3. Electric vehicles and hybrid electric vehicles 4. Renewable energy systems (e.g., solar power storage) 5. Medical devices and equipment

Detailed and Complete Alternative Models

1. BQ2002SN: Similar functionality but with a lower charging current range (up to 1A).
2. BQ2057WSN: Offers additional battery protection features, such as over-temperature protection and over-discharge protection.
3. BQ24650: Suitable for high-power charging applications with a charging current range up to 10A.

These alternative models provide similar functionality to BQ2004SNG4 but may have different specifications and package options.

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