Overview

The iW3617 two-stage solid-state lighting (SSL) LED driver combines high power factor (PF >0.95), low THD (<15%) and low output ripple (<20%) for residential and commercial dimmable retrofit LED luminaires up to 25W. By using a bipolar junction transistor (BJT) power device, reducing component count for the protection circuits, and using lower-cost electrolytic capacitors, the iW3617 enables a very low overall BOM cost.

The iW3617 is compatible with the IEC 61000-3-2 specification for electromagnetic compatibility (EMC), the Zhaga hot-plug standard, and incorporates mapping options that fall within the NEMA SSL 6 dimming curves. It also uses Renesas' patented, intelligent digital dimming to automatically detect the dimmer type and phase, enabling broad compatibility with analog and digital dimmers.

Renesas' unique over-temperature protection (OTP) derating circuit monitors an external NTC resistor; reduces the output drive to the LEDs in small, virtually imperceptible increments; then restores brightness as the temperature falls. This prevents exceeding the temperature rating of the electrolytic capacitors and helps ensure a predictable, safer bulb operating life.

iW3617 Functional Block Diagram
iW3617 Typical Applications Diagram
iW3617 Functional Block Diagram
iW3617 Typical Applications Diagram
  • Ideal for 25W Off-Line Solid-State Lighting Applications
  • High PF (>0.95) and Low THD (<15%)
  • PrimAccurate™ - Isolated Off-Line AC/DC Controller
  • Integrates Renesas' Flickerless™ Technology
    • Removes Virtually All LED Flicker
  • Less than 20% Output Ripple at 100Hz/120Hz
  • 45Hz to 66Hz Line Frequency Range - 50Hz/60Hz Compatible
  • Broad Range of Dimmer Capability
    • Leading Edge, Trailing Edge, Digital Dimmers and Occupancy Sensors and Timers
    • Automatic Detection of Dimmer Type and Phase
    • 1% to 100% Wide Dimming Range
    • Automatically Detects and Operates without Dimmer
  • Quasi-resonant Mode for Optimal Efficiency
  • Compatible with SSL Industry Standards
    • Zhaga Hot-Plug Standard
    • NEMA SSL 6 Dimming Standard for Incandescent Replacement
  • Fully Protected
    • Works from DC Voltage Emergency Back-Up System
    • NTC-based Temperature Derating Circuit
    • Overvoltage/Over-Temperature Protection
    • Output Overvoltage, Overcurrent and Short Circuit
    • Open LED Fault Detection
    • Sense-Resistor Short Circuit Protection

Applications

  • Dimmable LED Ballasts and Luminaires up to 25W
  • Dimmable Retrofit Lamps up to 25W

Documentation

= Featured Documentation
Type Title Date
Datasheet
iW3617 Datasheet
Log in to Download PDF 1.51 MB
Product Brief
iW3617 Product Summary
PDF 569 KB
Other
Reference Design EBC950: iW3617-00 40V/700mA, 90-132VAC, 12 LED Dimmable LED Driver Design
Log in to Download ZIP 3.52 MB
Other
Reference Design EBC951: iW3617-01 40V/700mA, 180-264VAC, 12LED Dimmable LED Driver Design
Log in to Download ZIP 3.44 MB
White Paper
Optimizing Operating Life for LED-based Light Bulbs
PDF 807 KB
White Paper
Removing LED Flicker from Priceless Family Memories
PDF 843 KB
White Paper
What is Digital Power White Paper
PDF 597 KB
7 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.

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Diagram of ECAD Models

Product Options

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    IW3617-00
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    IW3617-01
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    Samples Available
    		 SOIC-14 Tape & Reel 1 Get Samples,
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