iWatt Inc. - iW3630

Description
The iW3630 offers an output power up to 45W, high power factor (PF) > 0.95, total harmonic distortion <15%, and a small BOM to address performance, cost and reliability issues in high-performance, dimmable commercial solid state lighting applications. The iW3630 features a built-in isolation transformer driver that enables direct, 0-10V dimming without the need for an additional driver circuit and microcontroller. It also incorporates iWatt's proprietary PrimAccurate™ primary-side control technology, further reducing the BOM count by eliminating the need for an opto-coupler and external compensation components. Incorporating iWatt's proprietary Flickerless™ technology, the iW3630 allows for full 1%-100% flickerless dimming using either a direct analog voltage or a PWM signal. It is feature rich to ease design and provide a very robust solution, integrating iWatt’s EZ-EMI^® technology and several protection features. The iW3630 integrates a smart LED over-temperature protection function with automatic derating of the LED output current when the device is submitted to extreme temperatures.
Typical Applications Diagram
Typical Solid State LED Lighting Solution
Related Technical Documents
Flicker and Dimming Challenge LED-Lamp Design By Scott Brown Power Systems Design May 19, 2012 What is digital power and what are its benefits? By Zahid Rahim EE Times Power Management DesignLine September 16, 2010 Real Time Waveform Analysis Helps Optimize Charger Performance By Jerry Zehng, Yong Li, and Zahid Rahim Power Electronics Technology March 1, 2011

Features
High PFC (>0.95) and Low THD (< 15%) PrimAccurate™ - Isolated Off-Line AC/DC Controller Integrates iWatt's Flickerless™ Technology Removes Virtually All LED Flicker LED Applications up to 45W Off-Line Solid-State Lighting Applications 45Hz to 66Hz Line Frequency Range - 50Hz/60Hz Compatible Analog and PWM Dimming Compatibilty Direct Analog Control - 1% to 100% Range PWM Dimming Capable Integrated Isolation Transformer Driver for 0-10V Dimming Systems Quasi-resonant Mode for Optimal Efficiency Fully Protected Works from DC Voltage Emergency Back Up System Over-Temperature Protection with Automatic LED Derating Over-Voltage Protection Output Over-Voltage, Over-Current and Short Circuit Open LED Fault Detection Sense-Resistor Short Circuit Protection
Functional Block Diagram

Applications
Dimmable LED Ballasts with 0-10V Interface for Dimming Control Dimmable LED Ballasts with Analog Input for Dimming Control

Resources
	Datasheet
	App Notes
	Product Brief
	White Papers
	Samples
	Ref Designs
	Design Tool

Patents
6,385,059; 6,370,039; 6,862,198; 6,900,995; 6,956,750; 6,990,000; 7,443,700; 7,505,287; 7,589,983; 6,972,969; 7,724,547; 7,876,582; 7,880,447; 7,974,107; 7,974,109; 8,018,743; 8,049,481; 8,199,539;

Technology