BQ25971YFFR - English Editing Encyclopedia Entry

Product Overview

Category

BQ25971YFFR belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for power management in various electronic devices, such as smartphones, tablets, portable media players, and other battery-powered devices.

Characteristics

• High efficiency: The BQ25971YFFR offers high conversion efficiency, ensuring optimal power utilization.
• Fast charging: It supports fast charging protocols, enabling quick and efficient charging of batteries.
• Compact package: The IC comes in a small form factor package, making it suitable for space-constrained applications.
• Low power consumption: It features low quiescent current, minimizing power loss during standby or idle modes.

Package and Quantity

The BQ25971YFFR is available in a compact 20-pin QFN (Quad Flat No-leads) package. It is typically sold in reels containing a specified quantity, usually 250 or 300 units per reel.

Specifications

• Input voltage range: 3.9V to 14V
• Output voltage range: 3.3V to 13.8V
• Maximum charging current: 4A
• Operating temperature range: -40°C to 85°C
• Efficiency: Up to 95%
• Control interface: I2C (Inter-Integrated Circuit)

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground pin
3. VOUT: Output voltage pin
4. EN: Enable pin
5. SDA: I2C data line
6. SCL: I2C clock line
7. BAT: Battery connection pin
8. TS: Temperature sense pin
9. STAT: Status indicator pin
10. ILIM: Current limit setting pin
11. PGND: Power ground pin
12. BST: Boost converter input pin
13. SW: Switching node pin
14. FB: Feedback pin
15. COMP: Compensation pin
16. SS: Soft-start pin
17. VREF: Reference voltage pin
18. AGND: Analog ground pin
19. NC: No connection pin
20. NC: No connection pin

Functional Features

• Battery charging: The BQ25971YFFR provides a comprehensive charging solution, supporting various battery chemistries and charging profiles.
• Voltage regulation: It ensures stable output voltage by employing advanced control algorithms and feedback mechanisms.
• Thermal management: The IC incorporates thermal protection features to prevent overheating and optimize charging efficiency.
• Fault detection: It includes built-in fault detection mechanisms to safeguard against overvoltage, overcurrent, and short-circuit conditions.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power loss and improved battery life.
• Fast charging capability enables quick device turnaround times.
• Compact package allows for flexible integration in space-constrained designs.
• Wide input and output voltage ranges provide compatibility with various devices and batteries.

Disadvantages

• Limited maximum charging current may not be suitable for high-power devices requiring rapid charging.
• Dependency on I2C interface for control and configuration may add complexity to the system design.

Working Principles

The BQ25971YFFR operates as a buck-boost battery charger, utilizing a combination of buck (step-down) and boost (step-up) conversion techniques. It regulates the charging process by dynamically adjusting the voltage and current levels based on the battery's state of charge and other parameters. The IC employs a switching regulator topology to efficiently convert the input voltage to the desired output voltage while maintaining high conversion efficiency.

Detailed Application Field Plans

The BQ25971YFFR finds applications in a wide range of battery-powered devices, including but not limited to: - Smartphones and tablets - Portable media players - Wearable devices - Handheld gaming consoles - Digital cameras - Wireless headphones

Detailed and Complete Alternative Models

1. BQ25970YFFR: Similar to BQ25971YFFR with slightly different specifications.
2. BQ25972YFFR: Higher maximum charging current variant of BQ25971YFFR.
3. BQ25973YFFR: Lower maximum charging current variant of BQ25971YFFR.

These alternative models offer similar functionality and can be considered as alternatives based on specific requirements and design constraints.

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