STR-X6737

STR-X6737 Off-Line Quasi-Resonant Switching Regulators Features and Benefits Description ▪ Quasi-resonant topology IC  Low EMI noise and soft The STR-X6737 is a quasi-resonant topology IC designed for switching SMPS applications. It shows lower EMI noise characteristics ▪ Bottom-skip mode  Improved system efficiency over than conventional PWM solutions, especially at greater than the entire output load by avoiding increase of switching 2 MHz. It also provides a soft-switching mode to turn on the frequency ▪ Auto-Standby mode  Lowers input power at very light s output load condition n ▪ Avalanche-guaranteed MOSFET  Improves system-level ig reliability and does not require VDSS derating s ▪ 500 VDSS / 0.36 Ω RDS(on) e ▪ Various protections  Improved system-level reliability ▫ Pulse-by-pulse drain overcurrent limiting D ▫ Overvoltage Protection (bias winding voltage sensing), with latch w ▫ Overload Protection with latch e ▫ Maximum on-time limit d for N Package: 7-Pin TO-3P internal MOSFET at close to zero voltage (VDS bottom point) by use of the resonant characteristic of primary inductance and a resonant capacitor. The package is a fully molded TO-3P, which contains the controller chip (MIC) and MOSFET, enabling output power up to 290 W at 120 VAC input. The bottom-skip mode skips the first bottom of VDS and turns on the MOSFET at the second bottom point, to minimize an increase of operating frequency at light output load, improving systemlevel efficiency ove...