BQ294701DSGT

Product Overview

Category

BQ294701DSGT belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for battery protection in various electronic devices.

Characteristics

• Voltage range: 2.5V to 4.8V
• Low quiescent current: 10µA (typical)
• Overvoltage protection
• Undervoltage lockout
• Short-circuit protection
• Thermal shutdown protection

Package

The BQ294701DSGT is available in a small outline package (SOT-23) which ensures easy integration into circuit boards.

Essence

The essence of BQ294701DSGT lies in its ability to protect batteries from overvoltage, undervoltage, short-circuits, and thermal damage.

Packaging/Quantity

This IC is typically packaged in reels containing 3000 units per reel.

Specifications

• Operating voltage range: 2.5V to 4.8V
• Quiescent current: 10µA (typical)
• Overvoltage threshold: 4.35V (typical)
• Undervoltage threshold: 2.5V (typical)
• Short-circuit current limit: 1.5A (typical)
• Thermal shutdown temperature: 150°C (typical)

Detailed Pin Configuration

The BQ294701DSGT 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
6. RST - Reset input

Functional Features

• Overvoltage protection: Monitors the battery voltage and disconnects it from the load when it exceeds the preset threshold.
• Undervoltage lockout: Prevents the battery from discharging below a safe voltage level.
• Short-circuit protection: Detects excessive current flow and shuts down the circuit to prevent damage.
• Thermal shutdown protection: Safeguards against overheating by disabling the circuit when the temperature exceeds the specified limit.

Advantages and Disadvantages

Advantages

• Comprehensive battery protection features
• Low quiescent current consumption
• Compact package size for easy integration

Disadvantages

• Limited operating voltage range (2.5V to 4.8V)
• Relatively low short-circuit current limit (1.5A)

Working Principles

The BQ294701DSGT operates by continuously monitoring the battery voltage using an internal comparator. When the voltage exceeds the overvoltage threshold, the IC disconnects the battery from the load. Similarly, if the voltage drops below the undervoltage threshold, the IC prevents further discharge. In case of a short-circuit or excessive current flow, the IC quickly shuts down the circuit to protect the battery. Additionally, the thermal shutdown feature ensures that the IC disables itself when the temperature rises above the specified limit.

Detailed Application Field Plans

The BQ294701DSGT is widely used in various applications where battery protection is crucial. Some common application fields include:

1. Portable electronic devices: Smartphones, tablets, laptops, etc.
2. Power banks: Ensuring safe charging and discharging of batteries.
3. Electric vehicles: Protecting the battery pack from voltage fluctuations and short-circuits.
4. Industrial equipment: Battery-powered tools, sensors, and control systems.

Detailed and Complete Alternative Models

1. BQ294702DSGT: Similar to BQ294701DSGT with extended operating voltage range (2.5V to 5.5V).
2. BQ294703DSGT: Enhanced version with additional features like cell balancing and communication interface.

Note: This is not an exhaustive list, and there may be other alternative models available in the market.

In conclusion, the BQ294701DSGT is a versatile integrated circuit designed for battery protection. Its comprehensive features, low quiescent current, and compact package make it suitable for various applications. However, its limited operating voltage range and relatively low short-circuit current limit should be considered when selecting this IC for specific projects.