iW3640 Datasheet | Dialog Semiconductor

Description The i W3640 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 i W3640 uses Dialog’s unique digital Flickerless TM technology to eliminate visible flicker in the entire dimming range and minimize low frequency output ripple current. The i W3640 drives two-channel outputs. The duty cycle of the second channel varies with the dimming ratio. With advanced dimmer detection technology, the i W3640 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 i W3640’s cycle-by-cycle waveform analysis technology allows fast dimmer setting response. When no dimmer is...