BQ24045DSQR

Battery Chargers Overview

The BQ24045DSQR is a single-cell lithium-ion and lithium-polymer linear battery charger from Texas Instruments. It operates with an input voltage range of 3.5 V to 28 V and provides a regulated output charging current up to 1 A. The device supports a high-voltage chemistry with a charge termination voltage of 4.35 V. Packaged in a compact 10-WSON (2x2 mm) format, it integrates the power stage and current sensing. The component functions within a junction temperature range of 0°C to +125°C.

Battery Chargers Feature Summary

• Supports high-voltage 4.35 V lithium-ion and lithium-polymer battery chemistries
• Integrates input overvoltage protection for use with non-regulated adapters
• Includes thermal regulation to reduce charging current based on internal die temperature
• Features automatic start functionality upon valid power source detection

Battery Chargers Applications

• Portable consumer electronics
• Wearable devices
• Medical equipment
• Industrial handheld instruments

Battery Chargers Procurement Notes

Verify the specific suffix against the manufacturer datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint for the WSON-10 package. Confirm moisture sensitivity level handling requirements during assembly. Validate that the application circuit meets the input voltage and current programming constraints defined in the official documentation.

Battery Chargers Selection Notes

Select this component for applications requiring a compact solution for single-cell Li-Ion or Li-Po batteries. It is suitable for designs needing support for 4.35 V high-voltage cells rather than standard 4.2 V cells. Consider the integrated thermal management features for space-constrained enclosures where heat dissipation is limited. Verify that the external programming resistors align with the desired charge current and termination thresholds.

Battery Chargers Part Context

This part belongs to the BQ2404x series of highly integrated linear chargers designed for space-limited portable applications. The series includes variants such as the BQ24040 and BQ24041, which differ primarily in maximum charge current ratings and specific feature sets like USB input current limits. The BQ24045 specifically targets higher current needs while maintaining the small form factor.

Battery Chargers Replacement Considerations

The BQ24040DSQR is a documented alternative within the same family, offering similar functionality with an 800 mA maximum charge current. Designers should verify pinout compatibility and adjust external programming components if substituting with lower-current variants.