BQ24278YFFT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24278YFFT belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for managing power in portable electronic devices, such as smartphones, tablets, and wearable devices. It provides efficient charging and power delivery solutions.

Characteristics

• High efficiency: The BQ24278YFFT offers high charging efficiency, minimizing energy loss during the charging process.
• Fast charging: It supports fast charging protocols, enabling quick and efficient charging of devices.
• Compact package: The product comes in a small form factor, making it suitable for space-constrained applications.
• Integrated protection features: It incorporates various protection mechanisms like overvoltage protection, overcurrent protection, and thermal regulation to ensure safe charging.

Package and Quantity

The BQ24278YFFT is available in a compact and industry-standard package, such as a 20-pin QFN (Quad Flat No-leads) package. The quantity may vary depending on the supplier or manufacturer.

Specifications

• Input voltage range: 3.9V to 14V
• Output voltage range: 3.9V to 14V
• Charging current: Up to 3A
• Operating temperature range: -40°C to 85°C
• Efficiency: Up to 95%
• Supported charging protocols: USB BC1.2, USB PD, Qualcomm Quick Charge, etc.

Detailed Pin Configuration

The BQ24278YFFT has a total of 20 pins, each serving a specific function. Here is a detailed pin configuration:

1. VIN: Input voltage pin
2. VBUS: USB input voltage pin
3. ISET: Current limit setting pin
4. TS: Temperature sense pin
5. STAT: Charging status output pin
6. PG: Power good output pin
7. INT: Interrupt output pin
8. ILIM: Input current limit setting pin
9. VOUT: Output voltage pin
10. BAT: Battery voltage pin
11. TS/NTC: Temperature sense or NTC thermistor input pin
12. SRN/SR: System reset input pin
13. CE: Charge enable input pin
14. SDA: I2C data pin
15. SCL: I2C clock pin
16. GND: Ground pin
17. NC: No connection pin
18. NC: No connection pin
19. NC: No connection pin
20. NC: No connection pin

Functional Features

The BQ24278YFFT offers several functional features that enhance its performance and usability:

• Dynamic power management: It optimizes the power delivery based on the device's requirements, ensuring efficient charging.
• Battery temperature monitoring: The IC monitors the battery temperature to prevent overheating and damage.
• Charging status indication: The STAT pin provides information about the charging status, allowing users to monitor the progress.
• Fault detection and protection: The IC incorporates various protection mechanisms to safeguard against overvoltage, overcurrent, and short circuits.

Advantages and Disadvantages

Advantages: - High charging efficiency - Fast charging capability - Compact package size - Integrated protection features

Disadvantages: - Limited compatibility with certain charging protocols - Relatively higher cost compared to some alternatives

Working Principles

The BQ24278YFFT operates by regulating the flow of power from the input source (VIN/VBUS) to the battery (BAT) and the device being charged. It employs a switching regulator to efficiently convert the input voltage to the desired output voltage, while monitoring and controlling the charging process based on the device's requirements and battery status.

Detailed Application Field Plans

The BQ24278YFFT finds applications in various portable electronic devices, including: - Smartphones - Tablets - Wearable devices (smartwatches, fitness trackers) - Portable gaming consoles - Bluetooth headphones

Detailed and Complete Alternative Models

1. BQ24296YFFT: Similar to BQ24278YFFT, but with additional features like USB OTG support.
2. BQ24280YFFT: A lower-cost alternative with slightly reduced charging capabilities.
3. BQ24277YFFT: A variant with a different pin configuration but similar functionality.

These alternative models provide similar power management solutions and can be considered based on specific requirements and cost considerations.

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