BQ24151AYFFT - English Editing Encyclopedia Entry

Product Overview

Category

BQ24151AYFFT belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging lithium-ion batteries in various electronic devices such as smartphones, tablets, and portable electronics.

Characteristics

• Efficient charging: BQ24151AYFFT offers high-efficiency charging capabilities, ensuring faster and more reliable charging times.
• Advanced protection features: The IC incorporates multiple protection mechanisms, including overvoltage protection, overcurrent protection, and thermal regulation, ensuring safe and reliable charging operations.
• Compact package: BQ24151AYFFT is available in a small form factor package, making it suitable for space-constrained applications.
• High integration: This IC integrates all the necessary components required for battery charging, reducing the overall system complexity.

Package and Quantity

BQ24151AYFFT 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: 4.35V to 6.45V
• Charging current range: 500mA to 2A
• Output voltage range: 3.5V to 4.44V
• Operating temperature range: -40°C to 85°C
• Efficiency: Up to 95%
• Standby current: <10µA

Pin Configuration

The BQ24151AYFFT IC has the following pin configuration:

1. VBUS: Input voltage from the power source
2. PGND: Power ground
3. STAT: Status output pin
4. TS: Temperature sense input
5. ISET: Charging current setting pin
6. EN/UVLO: Enable/Undervoltage lockout control pin
7. CE: Charge enable input
8. SDA: I2C data input/output
9. SCL: I2C clock input
10. VDD: Power supply for internal circuitry
11. TS/NTC: Temperature sense or NTC thermistor input
12. BAT: Battery voltage output
13. SYS: System voltage output
14. ILIM: Input current limit setting pin
15. INT: Interrupt output pin
16. D+/D-: USB data pins
17. AC/DPDM: AC adapter detection or DP/DM detection pin
18. SRN/SRP: Source resistor network pins
19. GND: Ground
20. VBUS: Input voltage from the power source

Functional Features

1. High-efficiency charging: BQ24151AYFFT utilizes advanced charging algorithms to optimize the charging process, resulting in faster and more efficient battery charging.
2. Multiple protection mechanisms: The IC incorporates overvoltage protection, overcurrent protection, and thermal regulation features to ensure safe charging operations and prevent damage to the battery or the charging circuit.
3. I2C interface: BQ24151AYFFT supports an I2C interface, allowing for easy communication and control of the charging parameters.
4. Charge enable control: The charge enable (CE) pin provides flexibility in enabling or disabling the charging process as per system requirements.
5. Status indication: The STAT pin provides status information regarding the charging process, allowing the system to monitor the battery's charging state.

Advantages and Disadvantages

Advantages

• High charging efficiency reduces charging time.
• Comprehensive protection mechanisms ensure safe charging operations.
• Compact package size enables integration into space-constrained designs.
• I2C interface allows for easy control and monitoring of charging parameters.

Disadvantages

• Limited compatibility with certain battery chemistries.
• Relatively higher cost compared to non-integrated charging solutions.

Working Principles

BQ24151AYFFT operates based on a switching regulator architecture. It regulates the charging current and voltage to ensure optimal charging of lithium-ion batteries. The IC continuously monitors the battery's voltage, temperature, and charging status to adjust the charging parameters accordingly. It employs pulse width modulation (PWM) techniques to control the charging current and maintain the desired voltage levels. The integrated protection mechanisms safeguard against potential hazards such as overvoltage, overcurrent, and excessive temperature.

Detailed Application Field Plans

BQ24151AYFFT finds applications in various electronic devices that require lithium-ion battery charging capabilities. Some of the common application fields include:

1. Smartphones and tablets
2. Portable media players
3. Wearable devices
4. Bluetooth headsets
5. Portable gaming consoles
6. Digital cameras

Alternative Models

For users seeking alternative models with similar functionalities, the following options are available:

1. BQ24150AYFFR
2. BQ24152YFFT