BQ294702DSGT - English Editing Encyclopedia Entry

Product Overview

Category

BQ294702DSGT belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This product is primarily used for safeguarding batteries against overcharging, over-discharging, and short-circuiting. It ensures the longevity and optimal performance of batteries in various electronic devices.

Characteristics

• Battery protection IC with advanced features
• High accuracy and reliability
• Low power consumption
• Compact size for easy integration
• Wide operating voltage range
• Suitable for different battery chemistries (e.g., Li-ion, Li-polymer)

Package

BQ294702DSGT is available in a small form factor package, such as a surface-mount device (SMD). The package provides mechanical protection and facilitates easy soldering onto circuit boards.

Essence

The essence of BQ294702DSGT lies in its ability to monitor and control battery parameters, ensuring safe and efficient operation.

Packaging/Quantity

This product is typically supplied in reels or tubes, containing a specific quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating Voltage Range: 2.5V to 28V
• Overcharge Detection Voltage: 4.1V to 4.4V (adjustable)
• Overdischarge Detection Voltage: 2.0V to 3.0V (adjustable)
• Short-Circuit Protection Threshold: 50mΩ to 500mΩ (adjustable)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT-23

Detailed Pin Configuration

The BQ294702DSGT IC has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output
4. SCL: Serial clock input
5. OUT: Open-drain output for fault indication

Functional Features

• Overcharge protection: Prevents the battery from being charged beyond safe limits.
• Overdischarge protection: Safeguards the battery by preventing excessive discharge.
• Short-circuit protection: Detects and protects against short circuits in the battery circuitry.
• Fault indication: Provides an open-drain output to indicate any detected faults.

Advantages and Disadvantages

Advantages

• High accuracy in monitoring battery parameters
• Reliable protection against overcharging, over-discharging, and short-circuits
• Low power consumption, minimizing energy wastage
• Compact size allows for easy integration into various electronic devices
• Wide operating voltage range accommodates different battery chemistries

Disadvantages

• Limited to battery protection functionality only
• Requires additional circuitry for charging and discharging control

Working Principles

BQ294702DSGT operates based on a combination of voltage and current sensing techniques. It continuously monitors the battery voltage and compares it with pre-set thresholds to detect overcharge and overdischarge conditions. The IC also measures the battery's internal resistance to identify potential short circuits. Upon detecting any abnormality, it triggers appropriate actions to protect the battery.

Detailed Application Field Plans

The BQ294702DSGT IC finds applications in various fields where battery protection is crucial. Some notable application areas include:

1. Portable Electronics: Smartphones, tablets, laptops, and wearable devices benefit from the reliable battery protection provided by this IC.
2. Electric Vehicles: Battery packs in electric cars and bikes require robust protection against overcharging and over-discharging, making this IC suitable for such applications.
3. Power Banks: Ensuring the safety and longevity of power bank batteries is essential, and this IC offers the necessary protection.
4. Industrial Equipment: Battery-powered industrial equipment, such as handheld tools and measurement devices, can benefit from the reliable battery protection provided by this IC.

Detailed and Complete Alternative Models

1. BQ29700: A similar battery protection IC with extended features, including cell balancing and temperature monitoring.
2. MAX14920: An alternative IC offering comprehensive battery protection features along with additional diagnostics capabilities.
3. LTC6804: This IC provides battery protection for multi-cell battery packs and supports communication via an isolated serial interface.

These alternative models offer varying features and capabilities, allowing users to choose the most suitable option based on their specific requirements.

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