
Allegro MicroSystems
Description
The STR-X6759N 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.
▪Set Top Box
▪LCD PC monitor, LCD TV
▪Printer, Scanner
▪SMPS power supplies
FEATUREs and Benefits
▪Quasi-resonant topology IC ⇒ Low EMI noise and softswitching
▪Bottom-skip mode ⇒ Improved system efficiency over the entire output load by avoiding increase of switching frequency
▪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/ 0.385 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