ISL6251AHAZ

Battery Chargers Overview

The ISL6251AHAZ is a highly integrated battery charger controller designed for Li-Ion, Li-Ion polymer, and NiMH batteries. It utilizes a synchronous buck topology with MOSFET-based power selection to achieve high efficiency. The device supports 2, 3, or 4 series cells with ±0.5% charge voltage accuracy over temperature. It features programmable input current limits (±3% accuracy) and charge currents, along with diode emulation at light loads to prevent system bus boosting.

Battery Chargers Feature Summary

• Synchronous buck topology with low-side MOSFET diode emulation for improved light load efficiency
• Programmable AC adapter input current limit to prevent overload while optimizing available power
• Automatic transition between constant current and constant voltage charging modes
• Outputs for monitoring AC adapter presence and current draw

Battery Chargers Applications

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

Battery Chargers Procurement Notes

Verify the specific suffix 'HAZ' against the manufacturer's latest documentation to confirm lead-free compliance and package type. Ensure compatibility with the required battery chemistry and cell count configuration before procurement. Cross-reference the ordering part number with official Renesas databases to avoid obsolete variants.

Battery Chargers Selection Notes

Select this component for applications requiring high-efficiency charging in portable devices where space and thermal management are critical. The synchronous design reduces heat generation compared to diode-based solutions. Ensure the external MOSFETs and passive components match the programmed current and voltage parameters for optimal performance.

Battery Chargers Part Context

The ISL6251 belongs to the Intersil/Renesas battery management portfolio, specifically targeting mobile computing platforms. It serves as a controller that manages the charging profile for various lithium-based and nickel-based battery chemistries, integrating control logic with external power stage components.

Battery Chargers Replacement Considerations

The ISL6251A is a related variant within the same family. Verify pinout and feature parity if substituting. No other direct public substitutes are confirmed in the provided data.