BQ24031RHLRG4 - English Editing Encyclopedia Entry

Product Overview

Category

BQ24031RHLRG4 belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging single-cell lithium-ion or lithium-polymer batteries in portable electronic devices such as smartphones, tablets, and wearable devices.

Characteristics

• Input voltage range: 4.35V to 6.45V
• Output voltage range: 3.5V to 4.44V
• Charging current up to 1A
• Integrated power FET
• Thermal regulation and protection
• Charge status indication
• Small form factor package

Package and Quantity

The BQ24031RHLRG4 is available in a small outline package (SOP) with a thermal pad for enhanced heat dissipation. It is typically sold in reels containing a specified quantity of units.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Output Voltage Range: 3.5V to 4.44V
• Charging Current: Up to 1A
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOP-8

Pin Configuration

The BQ24031RHLRG4 features an 8-pin small outline package (SOP-8) with the following pin configuration:

1. VBUS: Input voltage from USB port
2. PGND: Power ground
3. STAT: Charge status output
4. THERM: Thermal regulation input
5. TS: Thermistor input for temperature monitoring
6. BAT: Battery connection
7. SYS: System output voltage
8. VIN: Input voltage from power source

Functional Features

1. Integrated Power FET: The BQ24031RHLRG4 incorporates an integrated power FET, eliminating the need for an external switch and reducing component count.
2. Thermal Regulation and Protection: The device includes thermal regulation to prevent overheating during charging. It also provides protection against overvoltage, overcurrent, and short-circuit conditions.
3. Charge Status Indication: The STAT pin provides charge status information, allowing the system to monitor the battery charging process.
4. Wide Input Voltage Range: With an input voltage range of 4.35V to 6.45V, the BQ24031RHLRG4 can be powered from various sources, including USB ports and wall adapters.

Advantages and Disadvantages

Advantages

• Integrated power FET reduces component count and simplifies design.
• Thermal regulation prevents overheating and ensures safe charging.
• Charge status indication enables monitoring of the charging process.
• Wide input voltage range allows flexibility in power source selection.

Disadvantages

• Limited to single-cell lithium-ion or lithium-polymer battery charging applications.
• May require additional external components for complete charging system implementation.

Working Principles

The BQ24031RHLRG4 operates by regulating the charging current and voltage to the connected lithium-ion or lithium-polymer battery. It utilizes a constant current/constant voltage (CC/CV) charging algorithm to ensure efficient and safe charging. The integrated power FET controls the charging current, while the thermal regulation feature protects against excessive temperature rise.

Detailed Application Field Plans

The BQ24031RHLRG4 is widely used in portable electronic devices that require single-cell lithium-ion or lithium-polymer battery charging. Some specific application fields include:

1. Smartphones: The BQ24031RHLRG4 is commonly employed in smartphone designs to facilitate fast and reliable battery charging.
2. Tablets: Tablet devices often utilize this IC to enable efficient charging of their lithium-ion or lithium-polymer batteries.
3. Wearable Devices: The small form factor and integrated features make the BQ24031RHLRG4 suitable for wearable devices such as smartwatches and fitness trackers.

Detailed and Complete Alternative Models

1. BQ24032RHLRG4: Similar to the BQ24031RHLRG4, this model offers additional features such as battery temperature monitoring and adjustable charge current limit.
2. BQ24035RHLRG4: This alternative model provides a higher charging current capability of up to 1.5A, making it suitable for devices with larger battery capacities.
3. BQ24070RHLRG4: Designed for multi-cell battery charging applications, this model supports charging of up to four series-connected lithium-ion or lithium-polymer cells.

In conclusion, the BQ24031RHLRG4 is an integrated circuit specifically designed for single-cell lithium-ion or lithium-polymer battery charging in portable electronic devices. Its integrated power FET, thermal regulation, and charge status indication features make it