Description

The STR-X6757 is a quasi-resonant topology IC designed for SMPS applications. It shows lower EMI noise characteristics than conventional PWM solutions, especially at greater than 2 MHz. It also provides a soft-switching mode to turn on the internal MOSFET at close to zero voltage (VDSbottom point) by use of the resonant characteristic of primary inductance and a resonant capacitor.

Features and Benefits

▪Quasi-resonant topology IC ⇒Low EMI noise and soft switching

▪Bottom-skip mode ⇒Improved system efficiency over the entire output load by avoiding increase of switching frequency

▪Auto-Standby mode ⇒Lowers input power at very light output load condition

▪Avalanche-guaranteed MOSFET ⇒Improves system-level reliability and does not require VDSS derating

▪650 VDSS/ 0.62 ΩRDS(on)

▪Various protections ⇒Improved system-level reliability

   ▫Pulse-by-pulse drain overcurrent limiting

   ▫Overvoltage Protection (bias winding voltage sensing), with latch

   ▫Overload Protection with latch

   ▫Maximum on-time limit