BQ25971YFFT - English Editing Encyclopedia Entry

Product Overview

Category

BQ25971YFFT 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 electronic devices, providing efficient charging and discharging capabilities.

Characteristics

• High efficiency power conversion
• Fast charging and discharging capabilities
• Compact size
• Wide input voltage range
• Overvoltage and overcurrent protection

Package

The BQ25971YFFT comes in a small form factor package, typically a 20-pin QFN (Quad Flat No-Lead) package. This package offers good thermal dissipation properties and ease of integration into various electronic devices.

Essence

The essence of BQ25971YFFT lies in its ability to efficiently manage power flow, ensuring optimal charging and discharging performance while protecting the device from potential damage due to voltage or current fluctuations.

Packaging/Quantity

The BQ25971YFFT is usually supplied in tape and reel packaging, with a standard quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 3.5V to 24V
• Output Voltage Range: 3.3V to 18V
• Maximum Charging Current: 4A
• Maximum Discharging Current: 4A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. PG: Power good indicator pin
5. VREF: Reference voltage output pin
6. ISET: Current limit setting pin
7. BAT: Battery connection pin
8. TS: Thermistor input pin
9. STAT: Status indicator pin
10. VBUS: USB input voltage pin
11. D+/D-: USB data pins
12. ILIM: Input current limit setting pin
13. VOUT: Output voltage pin
14. PGND: Power ground pin
15. BST: Boost converter output pin
16. SW: Switching node pin
17. FB: Feedback pin
18. COMP: Compensation pin
19. SS: Soft-start pin
20. AGND: Analog ground pin

Functional Features

1. High Efficiency Conversion: The BQ25971YFFT offers high efficiency power conversion, minimizing energy loss during charging and discharging processes.
2. Fast Charging and Discharging: With a maximum charging and discharging current of 4A, this IC enables rapid power transfer, reducing device downtime.
3. Overvoltage and Overcurrent Protection: The integrated protection features safeguard the device from potential damage caused by voltage or current spikes.
4. Wide Input Voltage Range: The BQ25971YFFT supports a wide range of input voltages, making it compatible with various power sources.

Advantages and Disadvantages

Advantages

• High efficiency power conversion
• Fast charging and discharging capabilities
• Compact size for easy integration
• Wide input voltage range for versatility
• Integrated protection features for device safety

Disadvantages

• Limited availability in certain markets
• Requires technical expertise for proper implementation

Working Principles

The BQ25971YFFT operates on the principle of switching power conversion. It utilizes a boost converter to step up the input voltage and regulate it to the desired output voltage. The integrated control circuitry ensures efficient power transfer while monitoring and protecting against overvoltage and overcurrent conditions.

Detailed Application Field Plans

The BQ25971YFFT finds applications in various electronic devices that require efficient power management, such as: - Smartphones and tablets - Portable gaming consoles - Wearable devices - Power banks - Industrial equipment

Detailed and Complete Alternative Models

1. BQ25970YFFT: Similar to BQ25971YFFT, but with a lower maximum charging and discharging current of 3A.
2. BQ25972YFFT: Similar to BQ25971YFFT, but with a higher maximum charging and discharging current of 5A.
3. BQ25973YFFT: Similar to BQ25971YFFT, but with additional features like temperature monitoring and thermal shutdown protection.

These alternative models offer similar functionality with slight variations in specifications to cater to different power management requirements.

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