BQ29411DCT3R - English Editing Encyclopedia Entry

Product Overview

Category

The BQ29411DCT3R belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This IC is primarily used for protecting lithium-ion and lithium-polymer batteries from overcharging, over-discharging, and short-circuiting.

Characteristics

• The BQ29411DCT3R is a compact and highly efficient battery protection IC.
• It offers advanced features such as overvoltage protection, undervoltage protection, and short-circuit protection.
• This IC is designed to ensure the safe and reliable operation of rechargeable batteries.

Package

The BQ29411DCT3R is available in a small form factor package, making it suitable for space-constrained applications.

Essence

The essence of the BQ29411DCT3R lies in its ability to safeguard batteries by monitoring voltage levels and preventing potential hazards.

Packaging/Quantity

This IC is typically sold in reels or tubes, with each reel/tube containing a specific quantity of BQ29411DCT3R units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 2.5V to 28V
• Overvoltage Protection Threshold: Adjustable (up to 28V)
• Undervoltage Protection Threshold: Adjustable (down to 2.5V)
• Short-Circuit Detection Threshold: Adjustable
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT-23

Detailed Pin Configuration

The BQ29411DCT3R has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. OUT: Output for external control circuitry
5. SDA: Serial data input/output for communication
6. SCL: Serial clock input for communication

Functional Features

• Overvoltage Protection: Monitors the battery voltage and disconnects it from the load when it exceeds the set threshold.
• Undervoltage Protection: Prevents excessive discharge by disconnecting the battery when its voltage drops below the set threshold.
• Short-Circuit Protection: Detects short-circuits and isolates the battery to prevent damage.
• Communication Interface: Supports I2C communication protocol for configuration and status monitoring.

Advantages and Disadvantages

Advantages

• Comprehensive protection features ensure the safety of batteries.
• Adjustable thresholds allow customization based on specific battery requirements.
• Small form factor package enables integration into space-constrained designs.
• I2C interface facilitates easy configuration and monitoring.

Disadvantages

• Limited to lithium-ion and lithium-polymer battery applications.
• Requires additional external control circuitry for complete battery management.

Working Principles

The BQ29411DCT3R operates by continuously monitoring the battery voltage through its dedicated pins. It compares the measured voltage with the configured thresholds for overvoltage and undervoltage protection. If any threshold is exceeded, the IC takes appropriate action to safeguard the battery. The short-circuit protection feature detects excessive current flow and disconnects the battery to prevent damage.

Detailed Application Field Plans

The BQ29411DCT3R finds extensive use in various battery-powered applications, including but not limited to: - Portable electronic devices (e.g., smartphones, tablets) - Wearable devices (e.g., smartwatches, fitness trackers) - Electric vehicles (EVs) and hybrid electric vehicles (HEVs) - Power tools - Energy storage systems

Detailed and Complete Alternative Models

1. BQ29700 - Battery protection IC with enhanced features and higher voltage range.
2. BQ76940 - Multi-cell battery protection and monitoring IC with advanced communication capabilities.
3. MAX14920 - Battery management IC with integrated fuel gauge functionality.

These alternative models offer similar functionalities to the BQ29411DCT3R and can be considered based on specific application requirements.

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