ISL9238CIRTZ

Overview

The ISL9238CIRTZ is a digital, configurable buck-boost battery charger IC manufactured by Renesas Electronics Corporation. It supports lithium-ion and lithium-polymer batteries with series counts ranging from two to four cells. The device operates within an input voltage range of 3.2 V to 23.4 V and provides an adjustable output charging voltage between 2.4 V and 18.304 V. It utilizes a 32-pin TQFN package (4x4 mm) designed for surface-mount installation. The component functions as part of the ISL9238 series, integrating charge management capabilities suitable for portable electronic devices.

Feature Summary

• Supports narrow voltage direct charging (NVDC) and hybrid power buck-boost modes for seamless system operation
• Features SMBus interface for digital configuration and monitoring of charging parameters
• Integrates advanced technology for efficient light-load charging performance
• Includes comprehensive protection mechanisms against overcurrent, overtemperature, and overvoltage conditions

Applications

• Tablets with 2 to 4 series battery configurations
• Ultrabook platforms requiring USB-C powered charging
• Notebook computers utilizing lithium-ion or polymer battery packs
• Portable power banks supporting USB Type-C specifications
• USB-C enabled portable devices needing integrated charge management

Procurement Notes

Verify the specific suffix 'C' in the part number ISL9238CIRTZ against official Renesas documentation to confirm feature sets, as variations exist within the family. Ensure compatibility with required firmware tools like VIDWriter if digital configuration via SMBus is utilized. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly. Check current availability status through authorized distributors, as production cycles may vary.

Selection Notes

Select this component when designing systems requiring a single-chip solution for 2S to 4S battery charging with USB Power Delivery integration. It is appropriate for applications demanding NVDC functionality to maintain system uptime during charging. Consider the 32-pin TQFN package constraints regarding thermal dissipation and PCB layout. Verify that the host controller can support the necessary SMBus communication for configuring charge currents and voltages according to specific battery chemistry requirements.

Part Context

The ISL9238CIRTZ belongs to the ISL9238 series of battery chargers, which are designed for high-performance portable electronics. This series integrates buck-boost topology to handle varying input voltages efficiently. The 'C' variant typically denotes specific feature enhancements or revisions within the product line, often related to improved efficiency or additional protection features compared to base models. It serves as a key component in modern USB-C powered device architectures.

Replacement Considerations

Direct substitutes include other variants within the ISL9238 family such as ISL9238IRTZ or ISL9238AHRTZ, provided pinouts and electrical characteristics match. The ISL9241HRTZ offers similar functionality but may differ in specific interface options or package dimensions. Always verify functional equivalence and regulatory compliance before substitution.