BQ24038RHLTG4

Product Overview

Category

The BQ24038RHLTG4 belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This IC is commonly used in portable electronic devices, such as smartphones, tablets, and wearable devices, to efficiently charge lithium-ion batteries.

Characteristics

• The BQ24038RHLTG4 is a highly integrated single-cell Li-Ion battery charger.
• It supports a wide input voltage range, making it suitable for various power sources.
• This IC incorporates multiple safety features to protect the battery and the device during the charging process.
• It offers high charging efficiency and low power dissipation, contributing to longer battery life.

Package and Quantity

The BQ24038RHLTG4 is available in a small outline package (SOP) with 20 pins. It is typically sold in reels or tubes containing a specified quantity, usually around 250 units per reel.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Charging Current: Up to 1.5A
• Charge Termination Voltage: 4.2V ± 1%
• Precharge Threshold Voltage: 2.9V ± 1%
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The BQ24038RHLTG4 has 20 pins arranged as follows:

Pin 1: VBAT Pin 2: TS Pin 3: PROG Pin 4: STAT Pin 5: PG Pin 6: CE Pin 7: ISET Pin 8: VSS Pin 9: VSS Pin 10: VSS Pin 11: VSS Pin 12: VSS Pin 13: VSS Pin 14: VSS Pin 15: VSS Pin 16: VSS Pin 17: VSS Pin 18: VSS Pin 19: VSS Pin 20: VDD

Functional Features

• The BQ24038RHLTG4 supports a constant current/constant voltage charging algorithm, ensuring optimal charging efficiency.
• It incorporates thermal regulation to prevent overheating during the charging process.
• This IC provides various status indicators, such as charge complete and fault conditions, through the STAT pin.
• It includes an integrated power path management feature, allowing simultaneous charging and discharging of the battery.

Advantages and Disadvantages

Advantages: - High charging efficiency - Wide input voltage range - Integrated safety features - Small form factor

Disadvantages: - Limited charging current compared to some other models - No built-in USB interface for direct device connection

Working Principles

The BQ24038RHLTG4 operates based on a switching regulator topology. It uses a combination of pulse width modulation (PWM) and constant voltage/constant current (CV/CC) techniques to regulate the charging process. The IC continuously monitors the battery voltage and adjusts the charging current accordingly to ensure safe and efficient charging.

Application Field Plans

The BQ24038RHLTG4 is widely used in portable electronic devices that require lithium-ion battery charging capabilities. Some common application fields include: - Smartphones - Tablets - Wearable devices - Portable medical devices - Portable audio players

Alternative Models

• BQ24032ARHLTG4
• BQ24035RHLTG4
• BQ24070RHLTG4
• BQ24075RHLTG4
• BQ24079RHLTG4

These alternative models offer similar functionality and can be considered as replacements for the BQ24038RHLTG4 in various applications.

In conclusion, the BQ24038RHLTG4 is a highly integrated single-cell Li-Ion battery charger IC. It offers high charging efficiency, multiple safety features, and a compact form factor. While it has some limitations in terms of charging current and direct device connection, it is widely used in portable electronic devices for efficient and reliable battery charging.