BQ24040DSQT 1A Linear Li-Ion Battery Charger IC – Single-Cell Management

Description

The BQ24040DSQT is a highly integrated, linear battery charger designed for single-cell Li-Ion and Li-Polymer applications. It is engineered to provide a safe and efficient charging process for your batteries, with support for input voltages up to 6.6V and a charging current of up to 1A. Its compact design and advanced protection features make it an ideal choice for portable devices that require a small, reliable charging solution.

This IC simplifies the power management section of your project by handling the entire charging cycle—including pre-conditioning, constant current, and constant voltage phases—ensuring your battery is charged to its maximum capacity while staying protected from overcharging or overheating.

Key Features

• High Efficiency Charging: Supports up to 1A charging current, allowing for faster charging of single-cell batteries.
• Advanced Safety: Includes built-in thermal protection, input over-voltage protection, and charge monitoring to keep your battery safe.
• Compact SMD Package: Housed in a small SMD-10 package, making it perfect for space-constrained electronics and wearable devices.
• Automatic Cycle Management: Fully manages the charging phases, so you don’t need complex external logic to safely charge your cells.
• Reliable Performance: Designed by industry leaders to provide consistent, high-quality power management for everyday use.

Application

• Portable Consumer Electronics: Perfect for charging batteries in handheld gadgets, Bluetooth speakers, and mobile peripherals.
• Wearable Devices: Its small footprint makes it an excellent choice for smartwatches and fitness trackers.
• DIY Power Projects: A great component for hobbyists building custom battery-powered enclosures with USB or wall-adapter charging.
• Backup Power Solutions: Useful for implementing reliable battery backup in small sensor nodes or smart home hardware.
• General Battery Charging: Ideal for any application needing a simple, robust way to charge a single-cell Li-Ion or Li-Po battery.

Package Includes

• 1 x BQ24040DSQT Single-Cell Li-Ion Battery Charger IC (SMD-10)

Technical Specifications

Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.