BQ24157SYFFT

Product Overview

Category

BQ24157SYFFT belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is commonly used in portable electronic devices such as smartphones, tablets, and wearable devices to efficiently charge their batteries.

Characteristics

• High charging efficiency
• Compact size
• Wide input voltage range
• Multiple charging modes
• Overvoltage and overcurrent protection
• Thermal regulation

Package

BQ24157SYFFT is available in a small form factor package, typically a 20-pin QFN (Quad Flat No-leads) package. This package offers good thermal dissipation properties and ease of integration into various electronic designs.

Essence

The essence of BQ24157SYFFT lies in its ability to provide efficient and reliable battery charging solutions for portable electronic devices.

Packaging/Quantity

This product is typically sold in reels or trays containing a specified quantity of ICs, depending on the manufacturer's packaging standards.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Charging Voltage Range: 3.5V to 4.44V
• Charging Current Range: 500mA to 2A
• Operating Temperature Range: -40°C to 85°C
• Efficiency: Up to 95%
• Protection Features: Overvoltage, overcurrent, and thermal protection

Detailed Pin Configuration

1. VIN: Input voltage pin
2. VBUS: USB input voltage pin
3. PGND: Power ground pin
4. SYS: System output voltage pin
5. TS: Temperature sense pin
6. STAT: Charging status indicator pin
7. ISET: Charging current setting pin
8. EN: Enable pin
9. ILIM: Input current limit pin
10. BAT: Battery voltage pin
11. TS/NTC: Temperature sense or NTC thermistor input pin
12. VREF: Reference voltage output pin
13. PROG: Programming pin
14. SDA: I2C data pin
15. SCL: I2C clock pin
16. INT: Interrupt output pin
17. TS/NTC: Temperature sense or NTC thermistor input pin
18. GND: Ground pin
19. VDD: Power supply pin
20. VBUS: USB input voltage pin

Functional Features

• Constant current and constant voltage charging modes
• Thermal regulation to prevent overheating
• Automatic detection of battery insertion/removal
• Charging status indication through STAT pin
• Programmable charging parameters via I2C interface
• Fault protection against overvoltage, overcurrent, and short circuits

Advantages and Disadvantages

Advantages

• High charging efficiency leads to faster charging times
• Wide input voltage range allows compatibility with various power sources
• Multiple charging modes cater to different battery chemistries
• Comprehensive protection features ensure safe charging operations
• Compact size enables integration into space-constrained designs

Disadvantages

• Requires additional external components for complete charging circuit implementation
• Limited availability of alternative models from other manufacturers

Working Principles

BQ24157SYFFT operates by regulating the charging current and voltage supplied to the battery. It employs a combination of constant current and constant voltage charging modes to optimize the charging process. The IC continuously monitors the battery's voltage, temperature, and charging status to ensure safe and efficient charging.

Detailed Application Field Plans

BQ24157SYFFT finds extensive application in various portable electronic devices, including but not limited to: - Smartphones - Tablets - Wearable devices - Portable gaming consoles - Bluetooth headphones - Portable power banks

Detailed and Complete Alternative Models

While BQ24157SYFFT is a popular choice for battery charging applications, there are alternative models available from different manufacturers that offer similar functionality. Some notable alternatives include: - MCP73831 - MAX1555 - LTC4054

These alternative models provide comparable features and can be considered based on specific design requirements.

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