AC/DC Digital Power Controller for High Power Factor Dimmable LED Drivers

The iW3614 is a high performance AC/DC offline power supply controller for dimmable LED luminaires, which uses advanced digital control technology to detect the dimmer type and phase. The dimmer conduction phase controls the LED brightness. The LED brightness is modulated by PWM-dimming. iW3614’s unique digital control technology eliminates visible flicker. ? Isolated AC/DC offline 100 VAC / 230 VAC LED driver ? Meets harmonic requirements, high power factor (power factor > 0.9 without dimmer) ? Line frequency ranges from 45Hz to 66Hz ? Intelligent wall dimmer detection x Leading-edge dimmer x Trailing-edge dimmer x No-dimmer detected x Unsupported dimmer ? Hybrid dimming scheme ? Wide dimming range from 1% up to 100% ? No visible flicker ? Resonant control to achieve high efficiency, 85% without dimmer ? Temperature compensated LED current ? Small size design x Small size input bulk capacitor x Small size output capacitor x Small transformer