the LEDs will never operate outside of their recommended safe operating area

The iW3610 uses advanced digital control technology to automatically detect and operate seamlessly with a leading edge or a trailing edge dimmer or if no dimmer is present. In case of an un-supported dimmer, the device shuts down and goes into a fail-safe mode. The device is compatible with existing wall dimmers available worldwide and allows parallel lamp operation for true retrofit replacement of incandescent bulbs, halogen lamps and linear fluorescent tubes.

The iW3610 operates in quasi-resonant mode and employs adaptive gate drive control and iWatt’s proprietary EZ EMI technology to achieve high efficiency and a low EMI signature. Depending on the application, efficiencies greater than 80% and power factor greater than 0.9 are easily achievable. The iW3610’s maximum operating frequency of 200kHz enables LED designers to use smaller size components to design driver boards that are small enough to fit inside existing bulb and lamp housing or inside fluorescent tubes. In addition to the standard protection features, the iW3610 also provides over-temperature protection using an external NTC resistor for robust protection. Moreover, the IC provides temperature drift control of the LED driver current to ensure that the LEDs will never operate outside of their recommended safe operating area.

Configured in size and features for MR16 LED replacements, the first reference design describes a built and tested 3 watt (W) to 5 W LED driver solution for driving high-brightness LEDS (HB-LEDs). The second design is targeted at designers looking to achieve compliance with the ENERGY STAR 1.1 requirements for led high bay light in residential luminaire applications and describes a built and tested off-line GreenPoint solution for an isolated 8 W constant current LED driver.