Overview

The iW3623 is a high-performance, two-stage, non-dimmable 45W Solid-State Lighting (SSL) LED driver that integrates boost and flyback converters into a single IC to reduce BOM cost and simplify design versus conventional two-stage driver approaches. Compliant to the IEC 61000-3-2 standard, the iW3623 offers a Power Factor (PF) of >0.95 from a universal input voltage of 100VAC to 277VAC, with Total Harmonic Distortion (THD) <10% and low output ripple <5% over the entire range.

The iW3623 incorporates Renesas' proprietary PrimAccurate™ primary-side control technology, eliminating the need for a secondary-side regulator and optical feedback isolator. It also allows FETs to be replaced with lower cost bipolar junction transistors (BJTs) and uses quasi-resonant mode switching for both the boost and flyback stages and dynamic base current to optimize conversion efficiency and minimize EMI.

Protection features include an on-board, external NTC-based temperature protection circuit that reduces the output drive to the LEDs to protect the circuit from overheating while maintaining light output.

iW3623 Functional Block Diagram
iW3623 Typical Applications Diagram
iW3623 Functional Block Diagram
iW3623 Typical Applications Diagram
  • High PF (>0.95) and Low THD (< 10%)
  • Low Output Ripple Current (<5%)
  • PrimAccurate™ - Isolated Offline AC/DC Controller
  • 45W LED Driver for Non-Dimmable Commercial Solid-State Lighting Applications
  • Flickerless™ Technology
    • Removes Virtually All LED Flicker
  • Resonant Mode for Optimal Efficiency
  • Fully Protected
    • NTC-based Temperature Derating Circuit
    • Overvoltage/Over-Temperature Protection
    • Output Overvoltage, Overcurrent and Short Circuit
    • Open LED Fault Detection
    • Sense-Resistor Short Circuit Protection
    • Single-Fault Protection

Applications

  • Non-Dimmable LED Lamps and Luminaires
  • Optimized for up to 45W Output Power

Documentation

= Featured Documentation
Type Title Date
Datasheet
iW3623 Datasheet
Log in to Download PDF 1.14 MB
Product Brief
iW3623 Product Summary
PDF 592 KB
White Paper
Challenges on Solid-State Lighting Offline Driver Design
PDF 1.94 MB
White Paper
Removing LED Flicker from Priceless Family Memories
PDF 843 KB
White Paper
What is Digital Power White Paper
PDF 597 KB
5 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Buy / Sample
    Part Number
    IW3623-00
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    Samples Available
    		 SOIC-14 Tape & Reel 1 Get Samples,
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