BQ24314DSJR - English Editing Encyclopedia Entry

Product Overview

Category

BQ24314DSJR belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used for battery charging and protection in portable electronic devices such as smartphones, tablets, and wearable devices.

Characteristics

• The BQ24314DSJR offers a compact and efficient solution for managing battery charging and protection.
• It provides various features like overvoltage protection, overcurrent protection, and thermal shutdown.
• This IC supports fast charging protocols such as USB Battery Charging Specification 1.2 and Chinese Telecommunication Industry Standard YD/T 1591-2009.

Package and Quantity

The BQ24314DSJR is available in a small package, typically a 10-pin VSON (Very Small Outline No-Lead) package. It is supplied in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 3.5V to 5.5V
• Output Voltage Range: 4.2V to 4.4V
• Charging Current: Up to 2A
• Operating Temperature Range: -40°C to +85°C
• Standby Current: Less than 1µA

Pin Configuration

The BQ24314DSJR has the following pin configuration:

1. VIN (Input voltage)
2. GND (Ground)
3. TS (Thermal shutdown)
4. STAT (Status output)
5. PG (Power good output)
6. ISET (Charging current setting)
7. VBUS (USB input voltage)
8. D+/D- (USB data lines)
9. BAT (Battery connection)
10. SYS (System output voltage)

Functional Features

1. Overvoltage Protection: The IC monitors the input voltage and protects the battery from excessive voltage levels.
2. Overcurrent Protection: It safeguards the battery by limiting the charging current to prevent damage due to high currents.
3. Thermal Shutdown: In case of excessive temperature, the IC shuts down to protect itself and the connected devices.
4. Power Good Output: The PG pin provides a signal indicating that the battery is being charged properly.
5. Charging Current Setting: The ISET pin allows the user to set the desired charging current based on the battery's specifications.

Advantages and Disadvantages

Advantages

• Compact size and efficient design
• Supports fast charging protocols
• Provides comprehensive protection features
• Easy integration into various portable electronic devices

Disadvantages

• Limited output voltage range
• Requires external components for complete battery charging circuit implementation

Working Principles

The BQ24314DSJR operates by monitoring the input voltage, battery voltage, and charging current. It regulates the charging process to ensure safe and efficient charging. The IC continuously checks for overvoltage, overcurrent, and thermal conditions, taking appropriate actions to protect the battery and the connected devices.

Detailed Application Field Plans

The BQ24314DSJR finds applications in a wide range of portable electronic devices, including: 1. Smartphones 2. Tablets 3. Wearable devices (smartwatches, fitness trackers) 4. Portable gaming consoles 5. Bluetooth speakers 6. Portable power banks

Alternative Models

For similar functionality, the following alternative models can be considered: 1. BQ24075RGTR 2. LTC4054LES5-4.2 3. MCP73831T-2ATI/OT

These models offer comparable features and can be used as alternatives to the BQ24314DSJR in various applications.

In conclusion, the BQ24314DSJR is a compact and efficient integrated circuit designed for battery charging and protection in portable electronic devices. With its comprehensive features and support for fast charging protocols, it provides a reliable solution for managing battery power.