BQ25798RQMR

Battery Chargers Overview

The BQ25798RQMR is an I2C-controlled buck-boost battery charger IC designed for 1 to 4-cell lithium-ion or lithium-polymer battery packs. It supports a maximum output current of 5A and operates with a supply voltage range of 3.6V to 24V, delivering regulated output voltages from 3V to 18.8V. The device features a compact 29-VQFN-HR (4x4) package and includes programmable charging parameters such as current, timer, and voltage. It integrates comprehensive fault protection mechanisms including overcurrent, overvoltage, and short-circuit safeguards.

Battery Chargers Feature Summary

• I2C interface for digital control and monitoring of charging parameters
• Buck-boost topology supporting single to four-cell battery configurations
• Integrated fault protection against overcurrent, overvoltage, and short circuits

Battery Chargers Applications

• Portable computing devices requiring multi-cell battery management
• Industrial equipment utilizing lithium-ion or polymer battery packs
• Medical devices needing precise charge regulation and safety features

Battery Chargers Procurement Notes

Verify the specific suffix RQMR corresponds to the required tape-and-reel packaging configuration. Confirm that the 29-VQFN-HR footprint matches your PCB layout requirements. Ensure compatibility with your system's I2C bus voltage levels and check for any recent Product Change Notifications regarding manufacturing site updates.

Battery Chargers Selection Notes

Select this component when designing systems with 1 to 4 series cells requiring up to 5A charging capability. It is suitable for applications where input voltage may vary above or below the battery pack voltage due to its buck-boost architecture. Consider the thermal performance of the VQFN-HR package in high-current scenarios.

Battery Chargers Part Context

This part belongs to the Texas Instruments BQ2579x family of advanced battery chargers. It shares functional similarities with the BQ25792 but offers specific pinout and feature variations tailored for different application densities. The RQMR suffix indicates the reel-based packaging format used for automated surface-mount assembly processes.

Battery Chargers Replacement Considerations

The BQ25792RQMR is a related variant within the same product family. Verify pin-to-pin compatibility and software register mapping before substitution, as differences in internal circuitry or pin assignments may exist between these specific model numbers.