Product Summary

The STRW6756 is a quasi-resonant regulator specifically designed to satisfy the requirements for increased integration and reliability in switch-mode power supplies. The STRW6756 incorporates a primary control and drive circuit with an avalanche-rated power MOSFET. The STRW6756 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.

Parametrics

STRW6556A absolute maximum ratings: (1)Control Supply Voltage, VCC: 35 V; (2)Drain-Source Voltage, VDSS: 650 V; (3)Drain Switching Current, ID: 15 A; (4)Peak Drain Switching Current,IDM: 15 A; (5)Single-Pulse Avalanche Energy, EAS: 400 mJ; (6)OCP/BD Voltage Range, VOCP: –1.5 V to +5 V; (7)FB Input Current, IFB: 10 mA; (8)FB Voltage Range, VFP: –0.5 V to +9 V; (9)Package Power Dissipation, PD: 0.8 W; (10)MOSFET Channel Temp., TJ : +150℃; (11)Internal Frame Temp., TF: +115℃; (12)Operating Temperature Range,TA: -20℃ to +115℃; (13)Storage Temperature Range, TS: -40℃ to +125℃.

Features

STRW6556A features: (1)Rugged 650 V Avalanche-Rated MOSFET Simplified Surge Absorption No VDSS Derating Required; (2)0.73Ω Maximum rDS(on); (3)Two Operational Modes by Automatic Switching: Quasi-Resonant Mode for Normal Operation Burst Mode for Standby Operation or Light Loads; (4)Automatic or Manually Triggered Burst Standby Input Power <0.1 W at No Load; (5)Low Operating Current (6 mA typ).

Diagrams

STRW6556A block diagram