IW380-31B

Overview

The iW380-31B is a high-performance, single-stage non-isolated buck DC/DC controller designed for second-stage LED lighting applications. It supports a wide input voltage range from 22V to 78V and delivers up to 150W of output power with tight current regulation accuracy of ±3%. The device features an integrated MOSFET and operates at switching frequencies between 400kHz and 600kHz. It provides exceptional dimming capabilities with a resolution of 0.0625% across a 0.0625% to 100% range, utilizing True DC Dimming technology to eliminate flicker. The component is housed in a compact SOIC-10 package.

Feature Summary

• Supports high-resolution True DC dimming with zero ripple across the entire dimming range
• Enables light-off mode for complete LED turn-off at minimum dimming input levels
• Offers versatile dimmer compatibility through dual DIM pins supporting PWM, analog, and RSET inputs
• Integrates comprehensive protection mechanisms including OVP, OCP, OSP, UVLO, and OTP

Applications

• Commercial solid-state lighting systems
• Stage lighting fixtures requiring precise control
• Second-stage post-regulation converters in AC/DC lighting architectures
• Stand-alone DC/DC converter implementations

Procurement Notes

Verify availability status carefully as supply may be limited or subject to factory special orders. Confirm that the specific suffix matches the required switching frequency variant (400kHz or 600kHz) and input voltage specifications. Ensure compliance with RoHS directives and check for any regional distribution restrictions before finalizing procurement plans.

Selection Notes

Select this controller when designing systems requiring high-voltage buck conversion with superior dimming fidelity. It is suitable for applications demanding minimal low-frequency output ripple and flicker elimination down to 1%. Consider the integrated MOSFET for simplified design and the flexible input options for compatibility with various dimming protocols like DALI-2 or 0-10V.

Part Context

The iW380 series represents Renesas' solution for advanced commercial LED drivers. This specific model focuses on high-resolution dimming and robust protection within a small footprint. It serves as a critical component in modern lighting ecosystems, bridging offline AC/DC conversion with precise LED current management to ensure consistent performance and longevity.

Replacement Considerations

Consult official cross-reference data for direct substitutes. Verify pinout compatibility and electrical parameter alignment if considering alternative manufacturers. Ensure that any replacement maintains the required dimming resolution and protection feature set.