STR-W6754

• Rugged 650V Avalanche-Rated MOSFET
  Simplified Surge Absorption
  No V_DSS Derating Required
• Choice of r_DS(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 <0.1W at No Load
• Low Operating Current (6mAtyp)
• 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

The Series STR-W6700 includes quasi-resonant topology ICs designed for SMPS power supplies, showing lower EMI noise characteristics - especially at more than 2MHz - than conventional PWM solutions. They utilize a soft switching to turn on the internal avalanche-guaranteed MOSFET at a close point to ground level (VDS bottom point) through the resonant phenomenon of a primary inductor and resonant capacitor. The package is a fully molded TO-220, which contains the controller chip and MOSFET, and enables the output power up to 140W at universal input, or 240W at 230VAC input. The bottom-skip function skips the first bottom of VDS and turns on the MOSFET at the second bottom point to minimize increase of operational frequency at light output load, improving system-level efficiency over the entire load condition. Two standby functions reduce the input power at very light output load conditions; one is an auto-burst mode operation internally triggered by sensing on-time, and the other is a manual standby mode that is executed by clamping the secondary output.

The Series STR-W6700 STR-W6754  includes quasi-resonant topology ICs designed for SMPS power supplies, showing lower EMI noise characteristics - especially at more than 2MHz - than conventional PWM solutions. They utilize a soft switching to turn on the internal avalanche-guaranteed MOSFET at a close point to ground level (VDS bottom point) through the resonant phenomenon of a primary inductor and resonant capacitor. The STR-W6754  package is a fully molded TO-220, which contains the controller chip and MOSFET, and enables the output power up to 140W at universal input, or 240W at 230VAC input. The bottom-skip function skips the first bottom of VDS and turns on the MOSFET at the second bottom point to minimize increase of operational frequency at light output load, improving system-level efficiency over the entire load condition. Two standby functions reduce the input power at very light output load conditions; one is an auto-burst mode operation internally triggered by sensing on-time, and the other is a manual standby mode that is executed by clamping the secondary output.