BQ24140YFFR - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24140YFFR 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 lithium-ion batteries in various electronic devices, such as smartphones, tablets, portable media players, and other portable electronics.

Characteristics

• The BQ24140YFFR offers a compact and efficient solution for battery charging.
• It supports fast charging protocols, enabling quick and efficient charging of lithium-ion batteries.
• The IC incorporates advanced safety features to protect the battery and the device from overcharging, overvoltage, and overcurrent conditions.
• It provides accurate battery voltage and current monitoring capabilities.
• The BQ24140YFFR is designed to operate with a wide input voltage range, making it suitable for various power sources.

Package and Quantity

The BQ24140YFFR is available in a small form factor package, such as a 20-pin QFN (Quad Flat No-Lead) package. The exact package type may vary depending on the manufacturer. Typically, this IC is supplied in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Charging Voltage Range: 3.5V to 4.44V
• Maximum Charging Current: 2A
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 94%
• Standby Current: <100µA

Pin Configuration

The BQ24140YFFR features a 20-pin QFN package with the following pin configuration:

1. VIN: Input voltage pin
2. VBUS: USB input voltage pin
3. PGND: Power ground pin
4. SYS: System voltage output pin
5. TS: Temperature sense input pin
6. STAT: Charging status output pin
7. ISET: Charging current set pin
8. VBAT: Battery voltage output pin
9. PROG: Programming pin
10. ILIM: Input current limit programming pin
11. EN2: Enable 2 pin
12. EN1: Enable 1 pin
13. SDA: I2C data pin
14. SCL: I2C clock pin
15. INT: Interrupt output pin
16. TMR: Timer input pin
17. SRN: Serial resistor network pin
18. BATFET: Battery FET control pin
19. TS/NTC: Thermistor input pin
20. PG: Power good output pin

Functional Features

• Fast charging support for lithium-ion batteries.
• Integrated power path management allows simultaneous charging and system operation.
• Dynamic power management optimizes charging efficiency based on input power availability.
• Comprehensive protection features, including overvoltage, overcurrent, and thermal protection.
• Programmable charging parameters to accommodate different battery chemistries and capacities.
• I2C interface for advanced configuration and monitoring capabilities.
• Fault detection and reporting for enhanced safety.

Advantages and Disadvantages

Advantages

• Compact and efficient solution for battery charging applications.
• Supports fast charging protocols, reducing charging time.
• Advanced safety features protect the battery and device from potential damage.
• Wide input voltage range enables compatibility with various power sources.
• Programmable charging parameters offer flexibility for different battery types.

Disadvantages

• Requires additional external components for a complete charging solution.
• Limited availability of alternative models from different manufacturers.

Working Principles

The BQ24140YFFR operates by regulating the charging current and voltage supplied to the lithium-ion battery. It utilizes a combination of power path management, voltage regulation, and current control techniques to ensure efficient and safe charging. The IC continuously monitors the battery's voltage and current levels, adjusting the charging parameters accordingly. It also incorporates safety mechanisms to prevent overcharging, overvoltage, and overcurrent conditions, thereby protecting the battery and the device.

Application Field Plans

The BQ24140YFFR is widely used in various portable electronic devices that rely on lithium-ion batteries for power. Some common application fields include:

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

Alternative Models

While the BQ24140YFFR is a popular choice for battery charging applications, there are alternative models available from different manufacturers. Some notable alternatives include:

1. MCP73871-2CCI/MLI by Microchip Technology Inc.
2. MAX1555ETB+T by Maxim Integrated
3. LTC4054LES5-4.2#TRMPBF by