BQ24251RGER

Product Overview

Category

The BQ24251RGER belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This IC is commonly used in portable electronic devices, such as smartphones, tablets, and wearable devices, to efficiently charge lithium-ion batteries.

Characteristics

• High efficiency: The BQ24251RGER incorporates advanced charging algorithms and power management techniques to maximize charging efficiency.
• Fast charging: It supports various fast charging protocols, enabling rapid charging of compatible devices.
• Thermal regulation: The IC includes built-in thermal regulation mechanisms to prevent overheating during charging.
• Input voltage protection: It features input voltage protection to safeguard against potential damage caused by voltage spikes or surges.
• Battery temperature monitoring: The BQ24251RGER monitors the battery temperature to ensure safe and optimal charging.

Package and Quantity

The BQ24251RGER is available in a small form factor package, such as a 24-pin VQFN (Very Thin Quad Flat No-Lead) package. It is typically sold in reels containing a specific quantity, usually 250 or 300 units per reel.

Specifications

• Input voltage range: 4.35V to 6.45V
• Charging current range: Up to 2A
• Programmable charging parameters
• Integrated power FETs (Field-Effect Transistors)
• Thermal regulation and protection
• Battery temperature monitoring
• Multiple charging profiles supported
• Overvoltage and overcurrent protection

Pin Configuration

The BQ24251RGER has a total of 24 pins, each serving a specific function. Here is a detailed pin configuration:

1. VIN: Input voltage pin
2. ISET: Current limit setting pin
3. TS: Thermistor input for battery temperature monitoring
4. STAT: Charging status indicator output
5. PG: Power good indicator output
6. CE: Charge enable input
7. SDA: I2C data line
8. SCL: I2C clock line
9. VSS: Ground pin
10. VSS: Ground pin
11. VSS: Ground pin
12. VSS: Ground pin
13. VSS: Ground pin
14. VSS: Ground pin
15. VSS: Ground pin
16. VSS: Ground pin
17. VSS: Ground pin
18. VSS: Ground pin
19. VSS: Ground pin
20. VSS: Ground pin
21. VSS: Ground pin
22. VSS: Ground pin
23. VSS: Ground pin
24. VBAT: Battery voltage pin

Functional Features

• Constant current (CC) and constant voltage (CV) charging modes
• Programmable charging parameters for customization
• Automatic battery detection and initialization
• Dynamic power path management for simultaneous charging and system operation
• Integrated safety features for protection against overvoltage, overcurrent, and overheating
• Support for various fast charging protocols, such as USB PD (Power Delivery), Qualcomm Quick Charge, and others

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced charging time
• Compatibility with multiple fast charging protocols
• Comprehensive safety features protect the battery and device
• Compact form factor suitable for portable electronic devices

Disadvantages

• Requires additional external components for complete charging circuit implementation
• Limited availability of alternative models from other manufacturers

Working Principles

The BQ24251RGER operates based on a combination of charging algorithms and power management techniques. It regulates the charging process by monitoring the battery voltage, temperature, and current. The IC adjusts the charging parameters accordingly to ensure efficient and safe charging.

Detailed Application Field Plans

The BQ24251RGER is widely used in various portable electronic devices, including smartphones, tablets, smartwatches, and other wearable devices. It is also utilized in power banks and other battery-powered applications where efficient and fast charging is essential.

Alternative Models

While the BQ24251RGER is a popular choice for battery charging applications, there are alternative models available from different manufacturers. Some notable alternatives include:

• MCP73871 by Microchip Technology
• MAX1555 by Maxim Integrated
• LTC4000 by Linear Technology

These alternative models offer similar functionality and features, providing options for designers and engineers based on specific requirements.

In conclusion, the BQ24251RGER is an integrated circuit designed for efficient and fast charging of lithium-ion batteries in portable electronic devices. Its high efficiency, compatibility with multiple fast charging protocols, and comprehensive safety features make it a preferred choice in the industry.