IW380-12B

Overview

The IW380-12B is a high-performance, single-stage non-isolated buck DC/DC controller designed for commercial LED lighting applications. It operates with an input voltage range of 22V to 78V and supports output power up to 150W. The device features a fixed switching frequency of 400kHz and provides tight output current regulation with ±3% accuracy. It utilizes Renesas' True DC dimming technology to achieve flicker-free performance across a wide dimming range from 0.0625% to 100%. 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
• Integrates comprehensive protection including input OVP, OCP, OSP, UVLO, and OTP
• Accepts multiple dimming inputs including PWM, analog, and resistor-set configurations

Applications

• Commercial solid-state lighting systems
• Second-stage post-regulation in AC/DC lighting converters
• Standalone DC/DC converter designs for LED arrays

Procurement Notes

Verify availability status as supply may be limited or subject to factory special orders. Confirm RoHS compliance details through official documentation. Ensure design compatibility with the specified SOIC-10 package dimensions and thermal requirements. Validate that the 22V to 78V input range aligns with system power architecture before procurement.

Selection Notes

Select this component for applications requiring precise constant current regulation and flicker-free dimming in commercial lighting. The 400kHz switching frequency offers a balance between efficiency and component size. Consider the ±3% current accuracy for uniform LED string performance. The integrated protections simplify design complexity by reducing external safety components.

Part Context

The IW380-12B belongs to the iW380 series of LED drivers developed by Renesas Electronics. This series focuses on high-efficiency buck conversion for next-generation lighting solutions. The device integrates advanced control algorithms to minimize low-frequency output ripple, ensuring stable operation even at very low brightness levels down to 1%.

FAQ

Does the IW380-12B support DALI-2 communication?

Yes, the device is DALI-2 compliant and supports MCU-based DALI dimming inputs alongside analog and PWM options.

What is the maximum dimming resolution of the device?

The device offers a high-resolution dimming capability with steps as small as 0.0625%.