ISL6251AHRZ-T

Battery Chargers Overview

The ISL6251AHRZ-T is a highly integrated battery charger controller designed for Li-Ion, Li-Ion polymer, and NiMH batteries. It utilizes a synchronous buck topology with diode emulation at light loads to enhance efficiency. The device supports 2, 3, or 4 series cells with a fixed 300kHz PWM frequency. Key electrical parameters include an input voltage range of 7V to 25V, a maximum output voltage of 5.075V, and charge voltage accuracy of ±0.5% over the operating temperature range of -10°C to +100°C.

Battery Chargers Feature Summary

• Synchronous buck topology with low-side MOSFET diode emulation for improved light load efficiency
• Programmable AC adapter input current limit with ±3% accuracy to prevent adapter overload
• Integrated thermal shutdown support and pulse charging capability
• 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 component authenticity through authorized Renesas distributors due to end-of-life status. Confirm RoHS compliance and moisture sensitivity level before procurement. Check for valid date codes and packaging integrity. Ensure supply chain stability as availability may be limited. Validate technical specifications against current design requirements prior to ordering.

Battery Chargers Selection Notes

Select this controller for applications requiring high-efficiency charging in portable computing devices. The synchronous buck design reduces external component count compared to traditional diode-based solutions. Consider the ±0.5% voltage accuracy for precise battery management. Evaluate the programmable current limits for system power budgeting. Ensure the QFN-EP-28 package fits the PCB layout constraints.

Battery Chargers Part Context

The ISL6251AHRZ-T belongs to the ISL6251A family of battery charger controllers from Renesas Electronics Corporation (formerly Intersil). This series is engineered for multi-chemistry battery support, including Lithium-ion and Nickel-based types. The part integrates control logic with a synchronous rectifier architecture to optimize power conversion efficiency in space-constrained mobile electronics.

Battery Chargers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.