ISL88739BHRZ

Battery Chargers Overview

The ISL88739BHRZ is a lithium-ion/polymer battery charger IC designed for notebook applications. It supports 2 to 4 series cells and operates with an input voltage range of 8V to 22V. The device features a Hybrid Power Boost (HPB) topology, allowing the battery to supplement the adapter during high-load conditions. It utilizes internal N-channel MOSFETs and an SMBus interface for configuration. Key electrical parameters include a charging voltage accuracy of ±0.5%, charge current limit accuracy of ±3%, and a trickle charge current range from 64mA to 220mA.

Battery Chargers Feature Summary

• Hybrid Power Boost (HPB) topology enables simultaneous system powering and battery charging by boosting energy from the battery when adapter capacity is exceeded.
• Internal N-channel MOSFETs reduce bill-of-materials cost while providing fast turn-on capabilities to prevent system bus voltage drops during sudden load changes.
• Comprehensive protection suite includes PROCHOT# indicators for system low voltage, adapter overcurrent, battery overcurrent, and thermal events.
• SMBus programmable parameters allow flexible adjustment of charging profiles and limits alongside hardware-based current limiting.

Battery Chargers Applications

• Notebook battery chargers
• Hybrid power boost systems requiring adapter supplementation
• Battery management in portable computing devices

Battery Chargers Procurement Notes

Verify component authenticity through authorized Renesas distributors or certified supply chain partners. Confirm RoHS3 compliance and MSL level 3 handling requirements during storage and assembly. Check for specific package labeling updates referenced in recent Product Change Notices. Ensure design-in compatibility with existing PCB footprints for the 32-QFN package before finalizing procurement orders.

Battery Chargers Selection Notes

Select this component for designs requiring integrated HPB functionality to extend runtime beyond adapter ratings. The SMBus interface offers flexibility for custom charging algorithms without external microcontrollers. Consider the 32-QFN package dimensions for space-constrained layouts. Evaluate the trade-off between current detection resistor values for optimal precision versus power loss based on system power requirements.

Battery Chargers Part Context

The ISL88739BHRZ belongs to the ISL88739 family of battery chargers manufactured by Renesas Electronics Corporation. It is specifically tailored for notebook PC applications, offering a compact solution for managing multi-cell lithium-ion or polymer batteries. The device integrates power switches and control logic to simplify the design of high-performance charging systems.

Battery Chargers Replacement Considerations

Consult official datasheets for pin-compatible alternatives within the ISL88739 family. Verify functional equivalence regarding HPB support and SMBus register maps before substituting. Review Product Change Notices for any packaging or labeling variations that may impact mechanical integration.