BQ26221PWG4 - English Editing Encyclopedia Entry

Product Overview

Category

BQ26221PWG4 belongs to the category of integrated circuits (ICs) specifically designed for battery management systems.

Use

This product is primarily used for monitoring and protecting rechargeable batteries, ensuring their safe and efficient operation.

Characteristics

• Integrated circuit designed for battery management
• Monitors battery voltage, current, and temperature
• Provides protection against overcharging, over-discharging, and over-temperature conditions
• Enables accurate fuel gauging and capacity estimation

Package

BQ26221PWG4 is available in a small form factor package, typically a 20-pin TSSOP (Thin Shrink Small Outline Package).

Essence

The essence of BQ26221PWG4 lies in its ability to ensure the optimal performance and safety of rechargeable batteries through comprehensive monitoring and protection features.

Packaging/Quantity

This product is usually supplied in reels or tubes, with each reel/tube containing a specific quantity of BQ26221PWG4 ICs. The exact quantity may vary depending on the manufacturer's packaging specifications.

Specifications

• Input Voltage Range: 2.5V to 26V
• Operating Temperature Range: -40°C to +85°C
• Battery Voltage Measurement Accuracy: ±0.5%
• Current Sense Amplifier Gain Accuracy: ±1%
• Fuel Gauge Voltage Measurement Resolution: 10mV
• Overvoltage Protection Threshold: Configurable
• Undervoltage Protection Threshold: Configurable
• Overcurrent Protection Threshold: Configurable
• Overtemperature Protection Threshold: Configurable

Detailed Pin Configuration

The BQ26221PWG4 IC has a total of 20 pins. The pin configuration is as follows:

1. VDD - Power supply input
2. GND - Ground reference
3. VBAT - Battery voltage input
4. TS - Temperature sense input
5. ISET - Current sense amplifier gain setting
6. SDA - I2C data line
7. SCL - I2C clock line
8. INT - Interrupt output
9. BATFET - Battery FET control
10. STAT - Status output
11. SRN - Serial number input
12. NC - No connection
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection
17. NC - No connection
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

1. Battery Monitoring: BQ26221PWG4 continuously measures battery voltage, current, and temperature to ensure accurate monitoring of battery parameters.
2. Protection Mechanisms: This IC provides protection against overcharging, over-discharging, and over-temperature conditions, safeguarding the battery from potential damage.
3. Fuel Gauging: Accurate fuel gauging and capacity estimation are enabled by the BQ26221PWG4, allowing users to monitor the remaining battery capacity effectively.
4. Configurability: The thresholds for various protection mechanisms can be configured according to specific application requirements.

Advantages and Disadvantages

Advantages

• Comprehensive battery monitoring and protection features
• Accurate fuel gauging and capacity estimation
• Configurable protection thresholds for customization
• Small form factor package for space-constrained applications

Disadvantages

• Limited pin configuration options
• Requires additional external components for complete battery management system implementation

Working Principles

BQ26221PWG4 operates based on the principles of continuous battery parameter monitoring and protection. It utilizes internal circuitry to measure battery voltage, current, and temperature accurately. The IC compares these measurements against configurable thresholds to trigger appropriate protection mechanisms, ensuring the battery's safe operation.

Detailed Application Field Plans

BQ26221PWG4 finds applications in various fields where rechargeable batteries are used, including: - Portable electronic devices (e.g., smartphones, tablets) - Electric vehicles and hybrid electric vehicles - Energy storage systems - Industrial equipment powered by batteries

Detailed and Complete Alternative Models

1. BQ26220PWG4: Similar to BQ26221PWG4 but with a reduced pin count.
2. BQ26222PWG4: Enhanced version of BQ26221PWG4 with additional features such as cell balancing.

These alternative models offer similar functionality and can be considered based on specific application requirements.

Word count: 550 words