BQ24261YFFT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24261YFFT 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.

Characteristics

• The BQ24261YFFT is a highly efficient power management IC that offers advanced charging capabilities.
• It supports various charging modes, including fast charging, trickle charging, and USB On-The-Go (OTG) charging.
• This IC incorporates multiple protection features to ensure safe charging, such as overvoltage protection, overcurrent protection, and thermal regulation.
• It is designed to optimize battery charging efficiency and extend battery life.

Package and Quantity

The BQ24261YFFT is available in a small form factor package, typically a 20-pin QFN (Quad Flat No-Lead) package. It is commonly supplied in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Output Voltage Range: 3.5V to 4.44V
• Charging Current Range: Up to 2A
• Operating Temperature Range: -40°C to 85°C
• Efficiency: Up to 95%
• Standby Current: Less than 100µA

Pin Configuration

The BQ24261YFFT has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. VIN: Input voltage pin
2. VBUS: USB input voltage pin
3. PGND: Power ground pin
4. SYS: System output voltage pin
5. TS: Thermistor input pin
6. ISET: Charging current setting pin
7. STAT: Charging status output pin
8. EN/UVLO: Enable/Undervoltage lockout pin
9. CE: Charge enable input pin
10. SRN: Suspend request input pin
11. TS/DPDM: Thermistor input / USB D+/D- detection pin
12. VREF: Reference voltage output pin
13. BAT: Battery voltage sense pin
14. TS2: Second thermistor input pin
15. ILIM: Input current limit setting pin
16. INT: Interrupt output pin
17. SDA: I2C data pin
18. SCL: I2C clock pin
19. GND: Ground pin
20. VOUT: Output voltage pin

Functional Features

The BQ24261YFFT offers several functional features that enhance its performance and usability:

1. Fast Charging: The IC supports high-speed charging, allowing devices to quickly recharge their batteries.
2. USB OTG Charging: It enables charging other devices through the USB On-The-Go feature.
3. Thermal Regulation: The IC incorporates thermal regulation to prevent overheating during charging.
4. Multiple Protection Mechanisms: It includes overvoltage protection, overcurrent protection, and battery temperature monitoring to ensure safe charging.
5. Charge Enable Control: The charge enable pin allows users to control the charging process manually.
6. Interrupt Output: The interrupt pin provides a signal to the system when specific charging events occur.

Advantages and Disadvantages

Advantages

• High charging efficiency results in faster charging times.
• Multiple protection mechanisms ensure safe charging and prevent damage to the device or battery.
• Compact form factor and small package size make it suitable for portable electronic devices.
• Support for USB OTG charging expands its functionality.

Disadvantages

• Limited availability of alternative models from different manufacturers.
• May require additional external components for specific applications.

Working Principles

The BQ24261YFFT operates by regulating the charging current and voltage to optimize battery charging efficiency. It utilizes a combination of control algorithms, feedback mechanisms, and protection circuits to ensure safe and efficient charging. The IC continuously monitors the battery voltage, temperature, and charging status to adjust the charging parameters accordingly.

Detailed Application Field Plans

The BQ24261YFFT is widely used in various portable electronic devices, including smartphones, tablets, smartwatches, and wireless earbuds. Its advanced charging capabilities and compact size make it suitable for applications where fast and efficient charging is essential.

Alternative Models

While the BQ24261YFFT is a popular choice for power management in portable electronic devices, there are alternative models available from different manufacturers. Some notable alternatives include:

1. MAX77827: A power management IC with similar features and capabilities.
2. LTC4000: An integrated circuit designed for high-efficiency battery charging.
3. TPS61085: A boost converter IC that provides efficient power management for portable devices.

These alternative models offer similar functionalities and can be considered as