BQ2002SNG4

Product Overview

Category

BQ2002SNG4 belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging rechargeable batteries, such as lithium-ion batteries, in various electronic devices.

Characteristics

• Integrated circuit designed for battery charging
• Supports charging of rechargeable batteries
• Suitable for use with lithium-ion batteries
• Provides efficient and reliable charging performance

Package

BQ2002SNG4 is available in a compact and industry-standard package. The package type is typically a small outline integrated circuit (SOIC).

Essence

The essence of BQ2002SNG4 lies in its ability to efficiently charge rechargeable batteries, ensuring optimal performance and longevity.

Packaging/Quantity

BQ2002SNG4 is commonly packaged in reels or tubes, depending on the manufacturer's specifications. The quantity per reel or tube may vary but is typically around 250 units.

Specifications

• Input Voltage Range: 4.5V - 28V
• Charging Current Range: 50mA - 1A
• Operating Temperature Range: -40°C to +85°C
• Control Interface: I2C
• Battery Chemistry Compatibility: Lithium-Ion (Li-Ion)

Detailed Pin Configuration

The pin configuration of BQ2002SNG4 is as follows:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. SDA - Serial data input/output for I2C communication
4. SCL - Serial clock input for I2C communication
5. BAT - Battery connection terminal
6. TS - Temperature sense input
7. PROG - Programming input for setting charging parameters
8. STAT - Status output indicating charging status

Functional Features

1. Integrated Charging Control: BQ2002SNG4 incorporates a complete charging control system, eliminating the need for external components.
2. I2C Communication Interface: The device utilizes the I2C interface for easy communication and configuration with the host system.
3. Temperature Sensing: BQ2002SNG4 includes a temperature sense input to monitor battery temperature during charging, ensuring safe operation.
4. Programmable Parameters: The PROG pin allows users to set various charging parameters, such as charging current and termination voltage, to suit specific battery requirements.
5. Status Indication: The STAT pin provides an output signal indicating the charging status, enabling the host system to monitor the progress.

Advantages and Disadvantages

Advantages

• Integrated charging control system simplifies design and reduces external component count.
• I2C interface enables easy communication and configuration.
• Temperature sensing ensures safe charging operation.
• Programmable parameters allow customization for different battery types.
• Status indication facilitates monitoring of charging progress.

Disadvantages

• Limited compatibility with other battery chemistries apart from lithium-ion.
• Requires additional circuitry for power supply and load management.

Working Principles

BQ2002SNG4 operates based on a sophisticated charging algorithm that regulates the charging current and voltage to ensure safe and efficient charging of lithium-ion batteries. The integrated control system monitors the battery's voltage, temperature, and charging status to adjust the charging parameters accordingly. This ensures optimal charging performance while preventing overcharging or overheating of the battery.

Detailed Application Field Plans

BQ2002SNG4 finds applications in various electronic devices that utilize rechargeable lithium-ion batteries. Some common application fields include:

1. Portable Electronics: Smartphones, tablets, and portable media players.
2. Wearable Devices: Smartwatches, fitness trackers, and wireless earbuds.
3. Portable Medical Devices: Blood glucose meters, pulse oximeters, and portable nebulizers.
4. Portable Power Banks: External battery packs for charging mobile devices on the go.
5. Electric Vehicles: Battery charging systems for electric cars and bikes.

Detailed and Complete Alternative Models

1. BQ2002SN - Similar to BQ2002SNG4 but without I2C communication interface.
2. BQ2002TPN - Enhanced version with additional protection features for battery safety.
3. BQ2002T - Non-programmable variant suitable for basic charging applications.

These alternative models offer similar functionality to BQ2002SNG4 but may have slight differences in terms of features and specifications.

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