Description

[ SANKEN ]

The STR-W6754 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.

Specifications and features

■ Rugged 650 V Avalanche-Rated MOSFET Simplified Surge Absorption No VDSS Derating Required ■ 0.96 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

Application Scenarios

The STR-W6754 is suitable for use in various switch-mode power supply applications, including but not limited to:

• LED lighting
• Consumer electronics
• Industrial equipment
• Telecommunications
• Renewable energy systems

Comparison

Advantages:
- Increased integration and reliability in switch-mode power supplies
- Low-level high-frequency EMI noise
- Bottom-skip function improves system efficiency
- Multiple protections for enhanced safety
- RoHS compliant

Disadvantages:
- Specific design for switch-mode power supplies may limit versatility
- Limited voltage rating of 650 V