BQ24314ADSGT - English Editing Encyclopedia Entry

Product Overview

Category

BQ24314ADSGT belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

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

Characteristics

• The BQ24314ADSGT offers a compact and efficient solution for battery charging and protection.
• It integrates various features including overvoltage protection, overcurrent protection, and thermal shutdown.
• The IC supports fast charging protocols such as USB Battery Charging Specification 1.2 and Chinese Telecommunication Industry Standard YD/T 1591-2009.

Package

The BQ24314ADSGT is available in a small form factor package, typically a 10-pin VSON (Very Small Outline No-Lead) package.

Essence

The essence of the BQ24314ADSGT lies in its ability to provide safe and efficient charging while protecting the battery from potential damage.

Packaging/Quantity

The IC is commonly sold in reels or tubes, with quantities varying depending on the supplier. Typical packaging options include tape and reel packaging with 2500 units per reel.

Specifications

• Input Voltage Range: 3.5V to 6.45V
• Output Voltage Range: 3.5V to 6.45V
• Maximum Charging Current: 2A
• Overvoltage Protection Threshold: 6.8V
• Overcurrent Protection Threshold: 2.8A
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The BQ24314ADSGT has a total of 10 pins, each serving a specific function:

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

Functional Features

1. Overvoltage Protection: The IC monitors the input voltage and disconnects the battery from the charging source if it exceeds the predefined threshold.
2. Overcurrent Protection: It safeguards the battery by limiting the charging current when it exceeds a certain threshold.
3. Thermal Shutdown: In case of excessive temperature, the IC shuts down to prevent damage to the device or battery.
4. Charging Current Setting: The charging current can be adjusted using the ISET pin, allowing flexibility based on the device's requirements.
5. Power Good Output: The PG pin provides an indication of the charging status, enabling the device to detect when the battery is fully charged.

Advantages and Disadvantages

Advantages

• Compact size and integration of multiple protection features make it suitable for portable electronic devices.
• Supports fast charging protocols, enhancing charging efficiency.
• Wide operating temperature range allows usage in various environments.

Disadvantages

• Limited maximum charging current compared to some other ICs in the market.
• Requires careful consideration of thermal management due to its small form factor.

Working Principles

The BQ24314ADSGT operates by continuously monitoring the input voltage, output voltage, and charging current. It compares these values with predefined thresholds to ensure safe charging and battery protection. If any parameter exceeds the specified limits, the IC takes appropriate actions such as reducing the charging current or disconnecting the battery from the charging source.

Detailed Application Field Plans

The BQ24314ADSGT finds applications in a wide range of portable electronic devices, including but not limited to: - Smartphones - Tablets - Wearable devices (smartwatches, fitness trackers) - Portable gaming consoles - Bluetooth headphones

Detailed and Complete Alternative Models

1. BQ24316DSGT: Similar to BQ24314ADSGT, but with a higher maximum charging current of 3A.
2. BQ24075RGTR: Offers similar functionality with additional features like battery temperature monitoring and USB OTG support.
3. LTC4054ES5-4.2: Provides comparable charging and protection features in a different package option.

These alternative models can be considered based on specific requirements and design constraints.

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