ISL97801ARZ-TK

Overview

The ISL97801ARZ-TK is a high-power LED driver IC from Renesas Electronics Corporation, designed for driving up to eight series-connected LEDs. It integrates a 36V FET and operates as a DC-DC regulator with step-down (buck) and step-up (boost) topologies. The device features an internal 1MHz clock for PWM conversion, achieving efficiency exceeding 90%. It supports analog and PWM dimming control with a maximum output current of 1A and an output voltage capability of 32V. The component is housed in a 20-QFN (4x4) package.

Feature Summary

• Integrates a 36V power FET for compact circuit design
• Supports both buck and boost converter topologies for flexible LED string configurations
• Enables precise brightness control through analog and PWM dimming capabilities

Applications

• High-power LED backlighting systems
• General-purpose LED lighting solutions requiring efficient regulation

Procurement Notes

Verify the specific suffix 'TK' against official Renesas documentation to confirm tape-and-reel packaging specifications. Ensure the 20-QFN pinout matches your PCB layout requirements. Cross-reference the RoHS status with the latest manufacturer declaration to confirm environmental compliance for your target market. Confirm that the 36V rating aligns with your system's peak voltage conditions.

Selection Notes

Select this component when designing circuits that require integrated power switching for LED strings up to 32V. The internal 1MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 1A output limit when sizing the LED array. The dual buck/boost capability simplifies designs where input voltage may vary relative to the LED forward voltage drop.

Part Context

This part belongs to the ISL97801 family of high-power LED drivers. It is manufactured by Renesas Electronics Corporation, formerly Intersil. The device is distinct from general-purpose regulators due to its specialized LED drive features, including dedicated dimming inputs and optimized thermal performance for high-current applications in a small footprint.

Replacement Considerations

Consult official Renesas substitution guides for direct equivalents. Verify pin compatibility and electrical parameters before replacing with other LED driver ICs. Generic replacements may lack the integrated 36V FET or specific dimming characteristics.