BQ24316DSJT

Product Overview

Category

BQ24316DSJT belongs to the category of integrated circuits (ICs) used in power management.

Use

This IC is primarily used for battery charging and protection in portable electronic devices.

Characteristics

• The BQ24316DSJT offers a compact and efficient solution for managing battery charging.
• It provides overvoltage, undervoltage, and overcurrent protection for the battery.
• The IC supports various charging modes, including constant current and constant voltage.
• It features a wide input voltage range, making it suitable for different power sources.
• The device incorporates thermal shutdown and reverse blocking protection mechanisms.

Package and Quantity

The BQ24316DSJT is available in a small 10-pin VSON package. It is typically sold in reels containing a quantity of 2500 units.

Specifications

• Input Voltage Range: 3.5V to 26V
• Charging Current Range: Up to 2A
• Operating Temperature Range: -40°C to +85°C
• Standby Current: <1µA
• Overvoltage Protection Threshold: Adjustable from 3.9V to 22V
• Undervoltage Protection Threshold: Adjustable from 2.4V to 20V
• Overcurrent Protection Threshold: Adjustable from 0.5A to 3.5A

Pin Configuration

The BQ24316DSJT has ten pins arranged as follows:

1. VIN: Input voltage pin
2. GND: Ground pin
3. BAT: Battery connection pin
4. TS: Thermal shutdown pin
5. STAT: Status output pin
6. PG: Power good output pin
7. ISET: Charging current setting pin
8. VREF: Reference voltage pin
9. ILIM: Overcurrent limit setting pin
10. VCC: Supply voltage pin

Functional Features

1. Overvoltage Protection: The IC monitors the input voltage and disconnects the battery when it exceeds the set threshold.
2. Undervoltage Protection: It prevents the battery from discharging below a certain voltage, ensuring its longevity.
3. Overcurrent Protection: The BQ24316DSJT limits the charging current to prevent damage to the battery or the IC itself.
4. Thermal Shutdown: In case of excessive temperature, the IC shuts down to protect itself and the connected components.
5. Power Good Output: The PG pin provides an indication of the charging status, signaling when the battery is fully charged.
6. Adjustable Parameters: The device allows customization of overvoltage, undervoltage, and overcurrent protection thresholds.

Advantages and Disadvantages

Advantages

• Compact size and high integration make it suitable for portable electronic devices.
• Wide input voltage range enables compatibility with various power sources.
• Adjustable parameters provide flexibility in different applications.
• Efficient charging modes help optimize battery performance.
• Built-in protection mechanisms enhance safety and reliability.

Disadvantages

• Limited charging current capacity may not be suitable for high-power devices.
• Lack of built-in communication interfaces restricts advanced control options.
• Relatively higher cost compared to simpler charging ICs.

Working Principles

The BQ24316DSJT operates by continuously monitoring the input voltage, battery voltage, and charging current. It compares these values with the user-defined thresholds to determine the appropriate charging mode and ensure safe operation. The IC regulates the charging current and voltage according to the selected mode until the battery reaches its desired charge level. It also protects the battery from overvoltage, undervoltage, and overcurrent conditions, preventing potential damage.

Application Field Plans

The BQ24316DSJT finds extensive application in various portable electronic devices, including smartphones, tablets, digital cameras, and portable gaming consoles. Its compact size, efficient charging capabilities, and built-in protection features make it an ideal choice for these devices.

Alternative Models

1. BQ24075RGTR: This IC offers similar battery charging and protection features with a different pin configuration.
2. LTC4054LES5-4.2: An alternative IC that provides comparable functionality in a different package.
3. MCP73831T-2ATI/OT: Another option with similar characteristics but from a different manufacturer.

These alternative models can be considered based on specific requirements and compatibility with the target application.

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