ISL6251HRZ-T

Battery Chargers Overview

The ISL6251HRZ-T is a highly integrated battery charger controller designed for Lithium-ion, Lithium Polymer, and NiMH batteries. It utilizes a synchronous buck topology with MOSFET-based power selection to achieve high efficiency. The device features programmable constant output voltage accuracy of 0.5% over temperature and supports 2, 3, or 4 series Li-Ion cells. Input current limiting is programmable within 3% accuracy to prevent AC adapter overload.

Battery Chargers Feature Summary

• Synchronous buck topology using MOSFETs instead of diodes for improved light load efficiency and prevention of system bus boosting
• Programmable input current limit to optimize available adapter power and avoid overloading the AC source
• Automatic transition between regulating current mode and regulating voltage mode during charging cycles

Battery Chargers Applications

• Notebook computers
• Desknote computers
• Sub-notebook computers
• Personal Digital Assistants

Battery Chargers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official Renesas documentation. Check for moisture sensitivity levels and recommended storage conditions prior to assembly. Ensure compatibility with the intended battery chemistry specifications.

Battery Chargers Selection Notes

Select this component for applications requiring precise voltage regulation across multiple cell configurations. Consider the synchronous design for systems prioritizing thermal management and efficiency at light loads. Evaluate the programmable current limits against the capabilities of the host power adapter to ensure safe operation.

Battery Chargers Part Context

This part belongs to the ISL6251 family of battery management ICs from Renesas Electronics. It serves as a core controller for portable electronic devices, replacing older linear or diode-based charging solutions. The family focuses on integrating charge management functions into a compact footprint suitable for space-constrained mobile hardware designs.

Battery Chargers Replacement Considerations

Consult official Renesas cross-reference lists for verified substitutes. Verify pinout compatibility and electrical parameter alignment before substitution. Generic equivalents may lack the specific synchronous control logic or accuracy specifications.