Product Summary

The iW3617 is a two-stage, high-performance AC/DC offline power supply controller for dimmable LED luminaires. It applies advanced digital control technology to detect the dimmer type and phase, which provides dynamic impedance to interface the dimmer and control the LED brightness at the same time. The iW3617 uses iWatt unique digital FlickerlessTM technology to eliminate visible flicker in the entire dimming range and minimize low frequency output ripple current. The iW3617 applications are: (1)Dimmable LED retrofit lamps up to 25W; (2)Dimmable LED ballast and luminaires up to 25W.

Parametrics

iW3617 absolute maximum ratings: (1)DC supply voltage range (pin 7, ICC = 20mA max)VCC: －0.3 to 18V ; (2)DC supply current at VCC pin ICC: 20mA ; (3)FDRV output (pin 10): －0.3 to 18V ; (4)BDRV output (pin 4): －0.3 to 4.0V ; (5)CFG input (pin 5): －0.3 to 4.0V ; (6)CFG output (pin 5): －0.3 to 18V ; (7)FVSENSE input (pin 12, I ≤ 10mA): －0.7 to 4.0V ; (8)BVSENSE input (pin 1, I ≤ 3mA): －0.7 to 4.0V ; (9)VIN input (pin 2): －0.3 to 18V ; (10)VCB input (pin 14): －0.3 to 18V ; (11)FISENSE input (pin 11): －0.3 to 4.0V .

Features

iW3617 features: (1)Primary side sensing eliminates the need for opto isolator feedback; (2)Tight LED current regulation (± 5%); (3)Fast start up (< 0.5s without dimmer); (4)Supports hot plug LED module (Zhaga); (5)Compatible with NEMA SSL6 dimming curve standard; (6)Supports wide LED output voltage range.

Diagrams

iW3617 pin connection