iW3600 Product Summary

AC/DC Digital Power Controller for

Single-Stage High Power Factor Dimmable LED Drivers

Rev. 1.1

iW3600

© 2014 Dialog Semiconductor (UK) Ltd.

Product Summary

1 of 5

1.0 Features

up to 45W output power

● Wide line frequency range (from 45Hz to 66Hz)

● Meets IEC61000-3-2 Current Harmonic requirement

● Total harmonic distortion < 20% with PF > 0.92

● Wide dimmer compatibility

x

Leading-edge dimmer

x

Trailing-edge dimmer

● Selectable dimming range of 1% to 100% or 10% to

100%

● Resonant control to achieve high efficiency (typical > 82%

without dimmer)

● Over-temperature LED current foldback

● Small solution size

x

Single-stage topology reduces part counts

x

90kHz maximum switching frequency enables the

use of a small transformer

● Primary-side sensing eliminates the need for opto-isolator

feedback

● Tight LED current regulation (± 5%)

● Fast start-up (< 0.5s without dimmer)

● Compatible with NEMA SSL6 dimming curve standard

● Multiple protection features that include:

x

LED open-circuit and short-circuit protection

x

Over-current protection

x

Over-temperature protection

x

Current sensing resistor short-circuit protection

● AC line over-voltage protection

2.0 Description

The iW3600 is a single-stage, high-performance

AC/DC offline power supply controller for

dimmable LED luminaires. It applies advanced

digital control technology to detect the dimmer

type, which provides dynamic impedance to

interface with the dimmer and control the LED

brightness at the same time.

With advanced dimmer detection technology, the iW3600

can operate with most wall dimmers including leading-edge

dimmers (R-type or R-L type) and trailing-edge dimmers (R-C

type). In addition, the iW3600’s cycle-by-cycle waveform

analysis technology allows for fast dimmer setting response.

When no dimmer is on the line, the iW3600 optimizes the

power factor and minimizes the current harmonic distortion

to the AC line. Furthermore, in no dimmer condition, output

current is regulated at nominal output current value over a

wide input voltage range.

The iW3600 operates the main power converter that delivers

current to the LED load in quasi-resonant mode to provide

high power efficiency and minimize electro-magnetic

interference (EMI). The commonly utilized converter

topologies for iW3600 are buck-boost and flyback. It uses

technology to achieve excellent LED current regulation

under different AC line and LED load voltages, without using

a secondary-side feedback circuit and thus eliminating the

need for an opto-coupler.

The iW3600 minimizes the external components count by

The intelligent dimmer detection technology minimizes the

bleeding power loss. Additionally, the digital control loop of

the iW3600 maintains stable overall operating conditions

without the need for loop compensation components.

3.0 Applications

● Dimmable LED retrofit lamps up to 45W

● Dimmable LED luminaires up to 45W