The STRF6668B is a quasi-resonant topology flyback switching power supply IC manufactured by Sanken. It integrates a power MOSFET and control circuits, facilitating compact and efficient power supply designs. This IC is particularly suitable for applications requiring low standby power consumption and high efficiency.

Applications:

• Power supplies for LCD TVs
• Adapters for consumer electronics
• Auxiliary power supplies
• DVD players power supplies
• Set-top box power supplies

Features:

• Quasi-Resonant (QR) control for high efficiency
• Integrated Power MOSFET
• Built-in startup circuit
• Overcurrent Protection (OCP)
• Overvoltage Protection (OVP)
• Overload Protection (OLP)
• Thermal Shutdown Protection (TSD)

Benefits:

• High efficiency operation reduces power consumption and heat generation.
• Simplified design due to integrated MOSFET and control circuitry.
• Enhanced system reliability with comprehensive protection features.
• Reduced component count, leading to smaller and more cost-effective power supplies.
• Improved standby power performance, meeting energy efficiency standards.

Additional Details:

The STRF6668B utilizes quasi-resonant switching, which minimizes switching losses and improves overall efficiency. It includes a built-in startup circuit that reduces external component count and simplifies the design process. The integrated power MOSFET is optimized for high-voltage operation and low on-resistance. The comprehensive protection features, including overcurrent, overvoltage, overload, and thermal shutdown, ensure reliable operation under various fault conditions. The IC is available in a DIP or SMD package. The operating frequency is dynamically adjusted to optimize efficiency across a wide load range. It is designed to comply with international safety standards. This device is widely used in power supplies for various consumer electronics applications where efficiency, reliability, and cost-effectiveness are critical requirements. The typical operating voltage range is 85VAC to 265VAC, making it suitable for worldwide applications. The standby power consumption is typically less than 0.1W, meeting stringent energy efficiency regulations. Its robust design and comprehensive protection features contribute to its long-term reliability in demanding operating environments.