The STR-W6753 is a quasi-resonant regulator specifically designed to satisfy the requirements for increased integration and reliability in switch-mode power supplies. It incorporates a primary control and drive circuit with an avalanche-rated power MOSFET. The regulator exhibits only low-level high-frequency EMI noise because of soft switching of the MOSFET close to ground (bottom point). A bottom-skip function minimizes an increase of operational frequency during light loads to improve system efficiency over the entire load range.

FEATURES AND BENEFITS
■ Rugged 650 V Avalanche-Rated MOSFET
   Simplified Surge Absorption
   No VDSS Derating Required
■ 1.7 Ω Maximum rDS(on)
■ Two Operational Modes by Automatic Switching:
   Quasi-Resonant Mode for Normal Operation
   Burst Mode for Standby Operation or Light Loads
■ Automatic or Manually Triggered Burst Standby
   Input Power <0.1 W at No Load
■ Low Operating Current (6 mA typ)
■ Auto-Bias Function
   Stable Burst Operation Without Generating Interference
■ Internal Off-Timer Circuit
■ Built-In Constant-Voltage Drive
■ Multiple Protections:
   Pulse-by-Pulse Overcurrent Protection
   Overload Protection with Auto Recovery
   Latching Overvoltage Protection
   Undervoltage Lockout with Hysteresis
■ RoHS Compliant