RENESAS IW3658-20F

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. With an integrated high-voltage MOSFET in an SO-7 package, which provides an extra pin spacing between the high voltage MOSFET’s drain and low voltage pins. With proprietary V_CC regulation circuit, the iW3658’s V_CC level is well maintained regardless of the LED voltage and dimmer phase angle, which eliminates the possibility of low end flickering.

• Isolated/non-isolated off-line 120VAC/230VAC LED driver up to 15W
• Wide line frequency range (45Hz – 66Hz)
• Excellent dimmer compatibility
  • Leading-edge dimmer
  • Trailing-edge dimmer
• Low BOM cost
• Integrated high-voltage MOSFET
• Single-winding inductor
• Internal start-up without the need for high voltage circuit
• Closed-loop constant current regulation
• Built-in LED current derating at high temperature
• Built-in over-temperature shut-down
• LED open and short protection
• Fast start-up (<0.5s without dimmer)
• Resonant control to achieve high efficiency (typical >85%)
• Supports Buck-Boost topology

• Dimmable LED retrofit lamps up to 15W
  • A-style, BR, GU and PAR
• Fits in E26/27 Socket for All-Glass Lamps