iW3658 Single-Stage SSL LED Driver with Integrated High Voltage MOSFET for Dimmable Retrofit Lamps up to 15W 1 Description The iW3658 is a highly integrated, high-performance off-line power supply controller for phase-cut dimmable LED luminaires. It uses patented PrimAccurate primary-side sensing technology to regulate output current accurately without the need for a feedback circuit. The iW3658 operates at boundary conduction mode to achieve high efficiency and low EMI. With advanced dimming control technology, the iW3658 can operate with most wall dimmers including leading-edge dimmers (R-type or R-L type) and trailing-edge dimmers (R-C type). The iW3658 operates in buck-boost mode to regulate current to the output LEDs. Dialogs innovative technology maximizes the iW3658 performance with an integrated high-voltage MOSFET in an SO-7 package, which provides an extra pin spacing between the high voltage MOSFETs drain and low voltage pins. With Dialogs proprietary V regulation circuit, the iW3658s V level is well maintained regardless of the LED voltage and CC CC dimmer phase angle, which eliminates the possibility of low end flickering. 2 Features Isolated/non-isolated off-line 120V /230V LED Closed-loop constant current regulation AC AC driver up to 15W (Note 1) Built-in LED current derating at high temperature Wide line frequency range (45Hz 66Hz) Built-in over-temperature shut-down Excellent dimmer compatibility LED open and short protection x Leading-edge dimmer Fast start-up (< 0.5s without dimmer) x Trailing-edge dimmer Resonant control to achieve high efficiency Low BOM cost (typical > 85%) Integrated high-voltage MOSFET Supports Buck-Boost topology Single-winding inductor Internal start-up without the need for high voltage circuit 3 Applications Dimmable LED retrofit lamps up to 15W (Note 1) x A-style, BR, GU and PAR Fits in E26/27 Socket for All-Glass Lamps Product Summary Rev. 0.92 Preliminary 20-Dec-2018 www.dialog-semiconductor.com 1 of 7 2018 Dialog SemiconductoriW3658 Single-Stage SSL LED Driver with Integrated High Voltage MOSFET for Dimmable Retrofit Lamps up to 15W L V - OUT N V + OUT iW3658 5 4 V HV G 6 V CC 7 2 COMP GND 8 CFG I 1 SENSE Figure 3.1 : iW3658 Typical Application Circuit Note 1 : For output power above 12W designs, care should be taken to verify the thermal and reliability constraints on the IC. An IC temperature below 120C is recommended for proper IC operation. Product Summary Rev. 0.92 Preliminary 20-Dec-2018 www.dialog-semiconductor.com 2 of 7 2018 Dialog Semiconductor