BQ24351DSGT

Product Overview

Category

BQ24351DSGT belongs to the category of integrated circuits (ICs) specifically designed for power management.

Use

This IC is commonly used in battery charging applications, particularly for single-cell lithium-ion or lithium-polymer batteries.

Characteristics

• The BQ24351DSGT offers a compact and efficient solution for battery charging.
• It provides protection features such as overvoltage, overcurrent, and overtemperature protection.
• This IC supports USB On-The-Go (OTG) functionality.
• It has a low quiescent current, making it suitable for portable devices with limited power budgets.

Package

The BQ24351DSGT is available in a small 10-pin VSON package, which allows for space-saving integration into various electronic devices.

Essence

The essence of BQ24351DSGT lies in its ability to efficiently manage and control the charging process of single-cell lithium-ion or lithium-polymer batteries, ensuring their safety and optimal performance.

Packaging/Quantity

The BQ24351DSGT is typically sold in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's packaging specifications.

Specifications

• Input Voltage Range: 3.9V to 6.2V
• Output Voltage Range: 4.2V to 4.5V
• Charging Current Range: Up to 1.5A
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: Less than 50µA

Detailed Pin Configuration

The BQ24351DSGT features the following pin configuration:

1. EN (Enable)
2. PG (Power Good)
3. STAT (Status)
4. GND (Ground)
5. VBUS (USB Supply Voltage)
6. VBAT (Battery Voltage)
7. TS (Thermal Sense)
8. SRN (System Reset)
9. D- (USB Data Minus)
10. D+ (USB Data Plus)

Functional Features

1. Overvoltage Protection: The IC monitors the battery voltage and automatically disconnects the charging circuit if it exceeds a predefined threshold, preventing potential damage to the battery.
2. Overcurrent Protection: BQ24351DSGT safeguards against excessive current flow during charging, ensuring the battery is not subjected to harmful levels of current.
3. Overtemperature Protection: This feature prevents the IC from operating at high temperatures, which could compromise its performance or lead to safety hazards.
4. USB OTG Support: The IC supports USB On-The-Go functionality, enabling devices to act as both hosts and peripherals, expanding their connectivity options.
5. Low Quiescent Current: With a low quiescent current, the IC minimizes power consumption when not actively charging, prolonging battery life in portable devices.

Advantages and Disadvantages

Advantages

• Efficient and reliable battery charging management.
• Comprehensive protection features for battery safety.
• Compact size for space-constrained applications.
• USB OTG support enhances device connectivity.

Disadvantages

• Limited to single-cell lithium-ion or lithium-polymer batteries.
• May require additional external components for certain applications.

Working Principles

The BQ24351DSGT operates by monitoring the input voltage, battery voltage, and temperature to regulate the charging process. It employs various protection mechanisms to ensure safe and efficient charging, such as controlling the charging current and terminating the charging cycle when necessary.

Detailed Application Field Plans

The BQ24351DSGT finds applications in a wide range of portable electronic devices, including but not limited to: - Smartphones and tablets - Portable gaming consoles - Wearable devices - Portable medical devices - Wireless headphones and earbuds

Detailed and Complete Alternative Models

1. BQ24075RGTR: Similar functionality with a different pin configuration.
2. MCP73831T-2ACI/OT: Alternative IC with comparable features for single-cell battery charging.
3. MAX1555EZK+T: Integrated circuit suitable for single-cell lithium-ion or lithium-polymer battery charging.

These alternative models offer similar capabilities and can be considered as substitutes for the BQ24351DSGT in various applications.

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