BQ24165YFFT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24165YFFT belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This IC is primarily used for managing and controlling the charging process of rechargeable batteries, ensuring efficient and safe charging.

Characteristics

• The BQ24165YFFT offers high efficiency charging, minimizing energy loss during the charging process.
• It supports various battery chemistries, including lithium-ion (Li-ion) and lithium-polymer (LiPo) batteries.
• This IC incorporates advanced safety features such as overvoltage protection, overcurrent protection, and thermal regulation.
• It provides a wide input voltage range, allowing it to be used with different power sources.
• The BQ24165YFFT includes a built-in USB detection feature, enabling seamless integration with USB-powered devices.

Package and Essence

The BQ24165YFFT is available in a small form factor package, typically a 20-pin QFN (Quad Flat No-leads) package. Its compact size makes it suitable for space-constrained applications.

Packaging/Quantity

This IC is commonly supplied in tape and reel packaging, with a standard quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Charging Voltage Range: 3.5V to 4.44V
• Charging Current Range: Up to 2A
• Operating Temperature Range: -40°C to 85°C
• Control Interface: I2C (Inter-Integrated Circuit)

Detailed Pin Configuration

1. VBUS: Input voltage from USB power source
2. GND: Ground reference
3. TS: Thermistor input for temperature monitoring
4. STAT: Status output pin indicating charging status
5. ISET: Charging current setting pin
6. PROG: Programming input for configuring charging parameters
7. SDA: Serial Data Line for I2C communication
8. SCL: Serial Clock Line for I2C communication
9. INT: Interrupt output pin for notifying charging events
10. BAT: Battery voltage connection
11. TS/NTC: Thermistor input or NTC thermistor connection
12. VSS: Ground reference
13. VDD: Supply voltage for internal circuitry
14. PG: Power Good output indicating successful charging
15. ILIM: Input current limit setting pin
16. CE: Charger enable control pin
17. D+/D-: USB data lines
18. VBUS: Input voltage from USB power source
19. GND: Ground reference
20. NC: No connection

Functional Features

1. High Efficiency Charging: The BQ24165YFFT incorporates advanced charging algorithms, maximizing the efficiency of the charging process and minimizing energy loss.

2. Safety Protection Mechanisms: This IC includes multiple safety features such as overvoltage protection, overcurrent protection, and thermal regulation, ensuring safe charging operations and preventing damage to the battery or the charging circuit.

3. USB Detection: The built-in USB detection feature allows the BQ24165YFFT to automatically detect the presence of a USB power source, enabling seamless integration with USB-powered devices.

4. Flexible Charging Parameters: With the PROG pin, users can configure various charging parameters such as charging current, termination voltage, and pre-charge current, providing flexibility to adapt to different battery chemistries and charging requirements.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced energy consumption.
• Comprehensive safety features protect the battery and charging circuit from potential damage.
• Compact size and small form factor package enable integration in space-constrained applications.
• USB detection feature simplifies the charging process for USB-powered devices.

Disadvantages

• Limited to a maximum charging current of 2A, which may not be suitable for high-capacity batteries or fast charging requirements.
• Requires additional external components for complete charging circuit implementation.

Working Principles

The BQ24165YFFT operates based on a switching regulator architecture. It regulates the charging voltage and current supplied to the battery by adjusting the duty cycle of an internal power switch. The IC continuously monitors the battery voltage, temperature, and charging status to ensure safe and efficient charging. It dynamically adjusts the charging parameters based on the battery's characteristics and the user-defined settings.

Detailed Application Field Plans

The BQ24165YFFT is widely used in various portable electronic devices that require battery charging capabilities. Some common application fields include:

1. Smartphones and Tablets: This IC is commonly found in smartphones and tablets, providing efficient and safe charging for their built-in rechargeable batteries.

2. Portable Gaming Devices: Portable gaming consoles often utilize the BQ24165YFFT to manage the