BQ29400ADCT3R - English Editing Encyclopedia Entry

Product Overview

Category

BQ29400ADCT3R belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This product is primarily used for protecting lithium-ion batteries from overcharging, over-discharging, and short-circuiting. It ensures the safe and efficient operation of battery-powered devices.

Characteristics

• Voltage Range: The BQ29400ADCT3R operates within a voltage range of 2.5V to 4.8V.
• Low Power Consumption: This IC consumes minimal power during normal operation, extending battery life.
• High Accuracy: It provides precise voltage and current monitoring, ensuring reliable battery protection.
• Small Form Factor: The BQ29400ADCT3R comes in a compact package, making it suitable for space-constrained applications.

Package

The BQ29400ADCT3R is available in a small outline package (SOT-23), which offers ease of integration into various electronic devices.

Essence

The essence of BQ29400ADCT3R lies in its ability to safeguard lithium-ion batteries by preventing potential hazards such as overcharging, over-discharging, and short-circuiting.

Packaging/Quantity

This product is typically sold in reels containing a specified quantity of units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Operating Voltage Range: 2.5V to 4.8V
• Overcharge Detection Voltage: 4.35V ± 25mV
• Overdischarge Detection Voltage: 2.4V ± 50mV
• Short-Circuit Detection Delay Time: 10μs
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT-23

Detailed Pin Configuration

The BQ29400ADCT3R features the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output for communication
4. SCL: Serial clock input for communication
5. OUT: Open-drain output indicating battery status
6. NTC: Negative temperature coefficient input for thermal protection

Functional Features

• Overcharge Protection: The BQ29400ADCT3R monitors the battery voltage and prevents overcharging by disconnecting the charging source when the voltage exceeds a predefined threshold.
• Overdischarge Protection: It also safeguards against over-discharging by cutting off the power supply when the battery voltage drops below a certain level.
• Short-Circuit Protection: In the event of a short circuit, this IC rapidly shuts down the current flow to prevent damage to the battery and connected devices.
• Temperature Monitoring: The BQ29400ADCT3R incorporates a negative temperature coefficient (NTC) input to monitor battery temperature and trigger protective measures if it exceeds safe limits.

Advantages and Disadvantages

Advantages

• Reliable Battery Protection: Ensures the safety and longevity of lithium-ion batteries.
• Compact Size: Suitable for space-constrained applications.
• Low Power Consumption: Maximizes battery life.
• High Accuracy: Provides precise monitoring for optimal performance.

Disadvantages

• Limited Compatibility: Designed specifically for lithium-ion batteries, may not be suitable for other battery chemistries.
• Requires External Components: Additional components may be needed for complete battery protection.

Working Principles

The BQ29400ADCT3R operates based on a combination of voltage and current monitoring techniques. It continuously measures the battery voltage and compares it to predefined thresholds to detect overcharging and over-discharging conditions. Additionally, it monitors the current flow to identify short-circuits. When any of these hazardous situations are detected, the IC takes appropriate action to protect the battery and connected devices.

Detailed Application Field Plans

The BQ29400ADCT3R finds applications in various battery-powered devices, including but not limited to: - Smartphones and tablets - Laptops and notebooks - Portable medical devices - Power banks and chargers - Electric vehicles and hybrid cars

Detailed and Complete Alternative Models

1. BQ29700ADCT3R: Similar to BQ29400ADCT3R, but with additional features such as cell balancing and fuel gauge functionality.
2. BQ29209DCT3R: Designed for multi-cell battery packs, offering enhanced protection and monitoring capabilities.
3. BQ24075RGTR: Provides comprehensive battery management solutions for single-cell lithium-ion batteries, including charging and protection functions.

These alternative models offer similar functionalities to the BQ29400ADCT3R while catering to specific application requirements.

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