BQ29443DRBR

Introduction

The BQ29443DRBR is a voltage monitor and protector integrated circuit designed for use in battery management systems. This device provides essential protection and monitoring functions for multi-cell lithium-ion or lithium-polymer battery packs.

Basic Information Overview

• Category: Battery Management IC
• Use: Voltage monitoring and protection for multi-cell battery packs
• Characteristics: Overvoltage protection, undervoltage protection, precision voltage monitoring
• Package: 8-pin SON (Small Outline No-Lead) package
• Essence: Ensures the safety and longevity of battery packs by monitoring and protecting against overvoltage and undervoltage conditions.
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier.

Specifications

• Input Voltage Range: 2.5V to 4.8V
• Overvoltage Threshold: Adjustable from 3.9V to 4.6V
• Undervoltage Threshold: Adjustable from 2.5V to 4.0V
• Operating Temperature Range: -40°C to 85°C
• Accuracy: ±15mV (typical)

Detailed Pin Configuration

1. VDD: Power supply input
2. VSS: Ground
3. OV: Overvoltage threshold setting pin
4. UV: Undervoltage threshold setting pin
5. FLT: Fault output
6. MR: Manual reset input
7. GATE: Gate drive output
8. BAT: Battery pack connection

Functional Features

• Overvoltage Protection: Monitors the battery pack voltage and triggers a fault condition if it exceeds the set threshold.
• Undervoltage Protection: Monitors the battery pack voltage and triggers a fault condition if it falls below the set threshold.
• Manual Reset Input: Allows for manual clearing of fault conditions.
• Gate Drive Output: Provides a signal to disconnect the load when a fault condition is detected.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring - Adjustable overvoltage and undervoltage thresholds - Manual reset capability

Disadvantages: - Limited to 8-pin package, may not support larger battery management systems - Limited fault indication options

Working Principles

The BQ29443DRBR continuously monitors the voltage of the battery pack. If the voltage exceeds the overvoltage threshold or falls below the undervoltage threshold, the device triggers a fault condition. The gate drive output can be used to disconnect the load from the battery pack, providing an additional layer of protection.

Detailed Application Field Plans

• Battery Management Systems: Used in electric vehicles, energy storage systems, and portable electronics to ensure the safety and reliability of battery packs.
• Industrial Equipment: Integrated into industrial battery backup systems to protect against overvoltage and undervoltage conditions.

Detailed and Complete Alternative Models

• BQ29442DRBT: Similar functionality with different pin configuration
• BQ29444DRBR: Enhanced features for larger battery management systems

This comprehensive overview of the BQ29443DRBR provides insight into its category, use, characteristics, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models, making it an essential reference for those seeking information about this battery management IC.