BQ24351DSGR

Product Overview

Category

BQ24351DSGR belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in battery charging and protection systems, providing efficient and reliable power management solutions.

Characteristics

• High efficiency: BQ24351DSGR offers high charging efficiency, ensuring optimal use of power.
• Protection features: It incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown, safeguarding the battery and the system.
• Compact package: The IC comes in a small form factor, making it suitable for space-constrained applications.
• Low power consumption: BQ24351DSGR consumes minimal power during operation, enhancing overall system efficiency.

Package and Quantity

The BQ24351DSGR is available in a small 10-pin VSON package. It is typically sold in reels containing a specified quantity, usually around 2500 units per reel.

Specifications

• Input voltage range: 3.5V - 26V
• Output voltage range: 4.35V - 4.45V
• Charging current: Up to 2A
• Operating temperature range: -40°C to +85°C
• Standby current: Less than 1µA

Pin Configuration

The BQ24351DSGR has ten pins, each serving a specific function:

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. BAT: Battery connection pin
4. TS: Thermal shutdown pin
5. STAT: Status output pin
6. PG: Power good output pin
7. ISET: Current limit setting pin
8. ILIM: Current limit programming pin
9. D+/D-: USB data pins
10. VBUS: USB power input pin

Functional Features

• Overvoltage protection: BQ24351DSGR monitors the input voltage and disconnects the battery if it exceeds a predefined threshold, preventing damage to the system.
• Overcurrent protection: It limits the charging current to prevent excessive current flow, ensuring safe operation.
• Thermal shutdown: The IC shuts down when the temperature exceeds a specified limit, protecting both the battery and the IC itself.
• Power good indication: BQ24351DSGR provides a power good signal to indicate the availability of a stable output voltage.
• USB compatibility: It supports USB power delivery standards, making it suitable for various portable devices.

Advantages and Disadvantages

Advantages

• High charging efficiency ensures optimal use of power.
• Comprehensive protection mechanisms safeguard the battery and the system.
• Compact package allows for easy integration into space-constrained applications.
• Low power consumption enhances overall system efficiency.

Disadvantages

• Limited output voltage range may not be suitable for all applications requiring higher voltages.
• Relatively high standby current may impact battery life in low-power applications.

Working Principles

BQ24351DSGR operates by monitoring the input voltage, current, and temperature. It regulates the charging current and protects against overvoltage, overcurrent, and overheating conditions. The IC also communicates with the system through status and power good pins, providing real-time information about the charging process.

Application Field Plans

The BQ24351DSGR is widely used in various battery-powered systems, including but not limited to: - Portable electronic devices such as smartphones, tablets, and laptops - Wearable devices like smartwatches and fitness trackers - Industrial equipment and instrumentation - Automotive applications

Alternative Models

For those seeking alternative options, several other ICs offer similar functionality to the BQ24351DSGR. Some notable alternatives include: - MCP73831: A compact, single-cell Li-ion/Li-polymer charge management controller. - MAX1555: An integrated battery charger for single-cell Li-ion batteries. - LTC4054: A standalone linear charger for single-cell Li-ion batteries.

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

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