The SSC1623G, manufactured by AUK Corp, is a highly integrated quasi-resonant (QR) flyback controller designed for offline power supplies. It's optimized for applications requiring high efficiency, low standby power consumption, and robust protection features. This controller incorporates various functions to simplify power supply design and enhance overall system performance.

Applications

• AC/DC adapters for consumer electronics
• Battery chargers
• Auxiliary power supplies in industrial equipment
• Standby power supplies for TVs and set-top boxes
• LED lighting power supplies

Features

• Quasi-Resonant (QR) Operation: Reduces switching losses and improves efficiency by switching at the valley of the drain-source voltage.
• Low Standby Power Consumption: Optimized for meeting stringent energy efficiency standards, such as Energy Star and ErP.
• Built-in Soft-Start: Minimizes stress on components during startup.
• Frequency Foldback: Further reduces standby power consumption by lowering the switching frequency at light loads.
• Over-Voltage Protection (OVP): Protects the power supply and load from over-voltage conditions.
• Over-Current Protection (OCP): Prevents damage from excessive current draw.
• Over-Temperature Protection (OTP): Shuts down the controller in case of overheating.
• Under-Voltage Lockout (UVLO): Ensures proper operation during voltage fluctuations.
• Leading Edge Blanking (LEB): Suppresses the initial current spike during switching, improving noise immunity.

Benefits

• High Efficiency: The QR operation and frequency foldback features contribute to high efficiency across a wide load range, reducing energy waste and heat dissipation.
• Reduced Component Count: Integration of multiple functions simplifies the power supply design and reduces the number of external components required.
• Enhanced Reliability: Comprehensive protection features ensure robust and reliable operation under various fault conditions.
• Simplified Design: The built-in soft-start and other integrated features streamline the design process and reduce time-to-market.
• Compliance with Energy Efficiency Standards: Enables power supplies to meet stringent energy efficiency requirements.

Additional Details

The SSC1623G typically operates with an external MOSFET and a flyback transformer. The switching frequency varies depending on the load conditions, typically ranging from tens of kHz to hundreds of kHz. External components, such as resistors and capacitors, are used to set the protection thresholds and operating parameters. AUK Corp provides detailed application notes and design guidelines to assist engineers in designing power supplies using the SSC1623G.