IW380-20B

Overview

The IW380-20B is a high-performance, single-stage non-isolated buck DC/DC controller designed for 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 a fixed switching frequency of 400kHz and operates within a temperature range of -40°C to +150°C. It utilizes an SOIC-10 package and includes comprehensive protection mechanisms such as input overvoltage, output short circuit, overcurrent, and overtemperature protection.

Feature Summary

• Supports True DC dimming technology providing flicker-free performance across the entire dimming range
• Offers high-resolution dimming capability with 0.0625% resolution steps
• Integrates multiple dimming interface options including PWM, analog, and resistor-set inputs
• Includes built-in light-off mode to completely turn off LEDs at minimum dimming levels

Applications

• Commercial solid-state lighting systems
• Second-stage post-regulation in AC/DC lighting converters
• Standalone DC/DC converter applications for LED drivers
• DALI-2 compliant dimmable lighting fixtures

Procurement Notes

Verify component authenticity through authorized Renesas distributors or official channels. Confirm RoHS compliance status and lead-free certification prior to integration. Check for moisture sensitivity level (MSL) handling requirements during storage and assembly. Ensure ordering suffix matches specific packaging preferences such as tape and reel quantities. Validate datasheet revisions against current production versions.

Selection Notes

Select this controller for designs requiring precise constant current regulation in non-isolated buck topologies. Consider its compatibility with various dimming protocols if advanced lighting control is needed. Evaluate thermal management needs given the high operating temperature limit. Ensure input voltage ranges align with the system's power supply architecture. Verify that the SOIC-10 package fits the available PCB footprint constraints.

Part Context

The IW380 series belongs to Renesas' portfolio of specialized LED driver integrated circuits. These components are engineered to address the stringent efficiency and dimming requirements of modern commercial lighting. The iW380 family distinguishes itself through proprietary True DC dimming technology, which eliminates low-frequency ripple currents often associated with traditional dimming methods.

Replacement Considerations

Cross-reference with other iW380 variants such as IW380-40B for different dimming support configurations. Verify pinout compatibility when substituting within the same product family. Ensure electrical parameters like input voltage range and switching frequency remain compatible with existing bill of materials.