BQ29401PWR

Product Overview

Category

BQ29401PWR belongs to the category of integrated circuits (ICs) used in electronic devices.

Use

This IC is primarily used for battery protection and monitoring in various applications.

Characteristics

• Battery protection: BQ29401PWR ensures safe operation by preventing overcharging, over-discharging, and overcurrent conditions.
• Monitoring: It provides accurate voltage and current measurements for battery management systems.
• Low power consumption: The IC operates with minimal power consumption, extending battery life.
• Compact package: BQ29401PWR is available in a small form factor, making it suitable for space-constrained designs.
• High reliability: It offers robust protection features and is designed to withstand harsh environmental conditions.

Package and Quantity

BQ29401PWR is packaged in a PowerPAD™ TSSOP-8 package. It is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 2.5V to 28V
• Operating Temperature Range: -40°C to +85°C
• Overvoltage Protection Threshold: Adjustable from 3.9V to 4.6V
• Undervoltage Protection Threshold: Adjustable from 1.8V to 3.1V
• Overcurrent Detection Threshold: Adjustable from 50mV to 1000mV
• Quiescent Current: 10µA (typical)

Pin Configuration

The BQ29401PWR IC has the following pin configuration:

```

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| | --| VDD GND |-- Pin 1: Ground (GND) --| SDA SCL |-- Pin 2: I2C Communication Interface (SDA) --| ALERT |-- Pin 3: Alert Output --| VSS VDD |-- Pin 4: Power Supply (VDD) --| BAT |-- Pin 5: Battery Connection (BAT) --| VSS VDD |-- Pin 6: Power Supply (VDD) --| SDA SCL |-- Pin 7: I2C Communication Interface (SCL) --| GND VDD |-- Pin 8: Ground (GND) |___________| ```

Functional Features

1. Overvoltage Protection: BQ29401PWR monitors the battery voltage and triggers protection mechanisms if it exceeds the set threshold.
2. Undervoltage Protection: It safeguards the battery by disconnecting the load when the voltage drops below the specified level.
3. Overcurrent Detection: The IC detects excessive current flow and initiates protective actions to prevent damage.
4. Temperature Monitoring: BQ29401PWR can measure the battery temperature, enabling thermal management strategies.
5. Communication Interface: It supports I2C communication for easy integration with microcontrollers or battery management systems.

Advantages and Disadvantages

Advantages

• Reliable battery protection and monitoring capabilities
• Low power consumption prolongs battery life
• Compact package suitable for space-constrained designs
• Adjustable thresholds for customization
• Robust performance in harsh environments

Disadvantages

• Requires additional components for complete battery management system implementation
• Limited to I2C communication interface

Working Principles

BQ29401PWR operates based on a combination of voltage and current sensing techniques. It continuously monitors the battery voltage and compares it against user-defined thresholds. If any threshold is exceeded, the IC triggers appropriate protection mechanisms to safeguard the battery and connected devices. The I2C interface allows for configuration and data exchange with external systems.

Application Field Plans

BQ29401PWR finds applications in various fields, including: 1. Portable electronic devices: Ensures safe battery operation in smartphones, tablets, and wearables. 2. Electric vehicles: Protects the battery pack from overcharging and overcurrent conditions. 3. Renewable energy systems: Monitors and protects batteries used in solar power storage applications. 4. Industrial equipment: Provides battery protection and monitoring in critical machinery and control systems.

Alternative Models

1. BQ29402PWR: Similar to BQ29401PWR with additional features like cell balancing and fuel gauge functionality.
2. BQ29403PWR: Offers enhanced voltage and current measurement accuracy for precise battery management.
3. BQ29404PWR: Designed for high-current applications, providing robust protection for heavy-duty batteries.

Note: The above alternative models are suggested based on similar functionalities and may require further evaluation for specific application requirements.

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