TIBQ24040

Overview

The BQ24040 is a highly integrated, single-cell Li-Ion and Li-Pol battery charger IC designed for space-constrained portable applications. It operates from either a USB port or an AC adapter, supporting a wide input voltage range with up to 30V absolute maximum rating to protect against unregulated industrial supplies. The device features a programmable charge current up to 1A and includes integrated safety functions like thermal regulation and input overvoltage protection.

Why Choose This Part

The BQ24040 provides a high level of integration in a tiny 2mm x 2mm WSON package, reducing external component count to just a few capacitors and resistors. Its 30V input rating eliminates the need for external transient voltage suppressors in many applications, while the 1% voltage accuracy ensures compatibility with high-density Lithium chemistries.

Applications

Getting Started

To evaluate this IC, Texas Instruments offers the BQ24040EVM evaluation module which allows for easy testing of the ISET and PRETERM resistor configurations. When designing a PCB, ensure the thermal pad is soldered to a large ground plane to manage heat dissipation during 1A fast-charge cycles. Programming the charge current is achieved by selecting a single resistor on the ISET pin according to the formula provided in the datasheet.

BQ24040 Family

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