BQ26220PWR

Product Overview

Category

BQ26220PWR belongs to the category of integrated circuits (ICs) and specifically falls under the battery management ICs.

Use

This product is primarily used for managing and controlling rechargeable batteries, ensuring their optimal performance and safety.

Characteristics

• Integrated circuit designed for battery management
• Provides protection against overcharging, over-discharging, and short-circuiting
• Monitors battery voltage and temperature
• Enables accurate fuel gauging and capacity estimation
• Supports communication protocols such as I2C and SMBus

Package

BQ26220PWR is available in a small outline package (SOP) with a thermal pad, allowing efficient heat dissipation.

Essence

The essence of BQ26220PWR lies in its ability to enhance the overall performance and safety of rechargeable batteries by providing comprehensive management and control features.

Packaging/Quantity

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

Specifications

• Input Voltage Range: 3.5V to 26V
• Operating Temperature Range: -40°C to +85°C
• Communication Interface: I2C, SMBus
• Battery Chemistry Compatibility: Lithium-ion (Li-ion), Lithium-polymer (Li-poly)
• Protection Features: Overvoltage, Undervoltage, Overcurrent, Short Circuit
• Fuel Gauging Accuracy: ±1%
• Cell Balancing Current: Up to 100mA

Detailed Pin Configuration

The BQ26220PWR IC has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data line for I2C/SMBus communication
4. SCL: Serial clock line for I2C/SMBus communication
5. BAT: Battery voltage input
6. TS: Temperature sense input
7. STAT: Status output pin
8. EN: Enable control pin

Functional Features

1. Overvoltage Protection: Monitors battery voltage and prevents it from exceeding the safe limit.
2. Undervoltage Protection: Ensures that the battery voltage does not drop below a critical threshold.
3. Overcurrent Protection: Safeguards against excessive current flow, preventing damage to the battery or connected devices.
4. Short Circuit Protection: Detects and mitigates short circuits in the battery circuitry.
5. Fuel Gauging: Accurately estimates the remaining capacity of the battery, providing reliable information to the user.
6. Cell Balancing: Balances the charge levels of individual cells within a battery pack, maximizing overall performance and lifespan.

Advantages and Disadvantages

Advantages

• Comprehensive protection features enhance battery safety.
• Accurate fuel gauging enables precise capacity estimation.
• Supports popular communication protocols for easy integration.
• Compact package with thermal pad ensures efficient heat dissipation.

Disadvantages

• Limited compatibility with specific battery chemistries.
• May require additional external components for certain applications.
• Relatively higher cost compared to basic battery management solutions.

Working Principles

BQ26220PWR operates by continuously monitoring the battery voltage and temperature. It compares these values against predefined thresholds to trigger appropriate protection mechanisms. The IC communicates with the host system through the I2C or SMBus interface, allowing seamless integration and control. By accurately estimating the battery's state of charge and implementing cell balancing techniques, BQ26220PWR optimizes battery performance and prolongs its lifespan.

Detailed Application Field Plans

BQ26220PWR finds applications in various fields, including but not limited to: - Portable electronic devices (smartphones, tablets, laptops) - Electric vehicles and hybrid electric vehicles - Power tools and industrial equipment - Renewable energy systems (solar power, wind power)

Detailed and Complete Alternative Models

1. BQ26221PWR: Similar to BQ26220PWR with additional features for multi-cell battery packs.
2. BQ26222PWR: Lower-cost variant with basic battery management functionalities.
3. BQ26223PWR: Enhanced version with extended temperature range and improved accuracy.

These alternative models offer different capabilities and cater to specific requirements, providing flexibility in choosing the most suitable battery management IC for a particular application.

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