The SSC9512 is a resonant type PWM controller IC produced by Sanken Electric. It is optimized for high-efficiency and low-noise power supply applications, particularly in resonant converters. It offers features to improve efficiency, reduce EMI, and provide comprehensive protection.

Applications:

• Power supplies for LCD TVs and monitors
• Power supplies for LED lighting
• AC-DC adapters for various electronic devices
• Industrial power supplies
• Server and telecom power supplies

Features:

• Resonant Mode Operation: Enables high efficiency and low EMI noise by switching at zero voltage or zero current.
• Frequency Modulation: Adjusts the switching frequency to regulate the output voltage.
• Soft-Start Function: Minimizes stress on components during startup.
• Overcurrent Protection (OCP): Protects against excessive current flow.
• Overvoltage Protection (OVP): Prevents damage from voltage surges.
• Undervoltage Lockout (UVLO): Ensures stable operation by disabling the IC when the input voltage is too low.
• Overload Protection (OLP): Shuts down the IC in case of overload.
• Thermal Shutdown (TSD): Protects the IC from overheating.

Benefits:

• High Efficiency: Resonant mode operation reduces switching losses, improving overall efficiency.
• Low EMI Noise: Zero voltage or zero current switching minimizes electromagnetic interference.
• Robust Protection: Integrated protection features ensure reliable and safe operation.
• Simplified Design: Integrates many control functions, reducing external component count.
• Cost-Effective Solution: Offers a balance of performance, reliability, and cost.

Additional Details:

The SSC9512 utilizes resonant mode operation, typically LLC resonant topology, which allows for switching at zero voltage or zero current. This minimizes switching losses and significantly reduces EMI noise. The frequency modulation technique is used to regulate the output voltage by adjusting the switching frequency based on the load conditions. The integrated protection features, such as OCP, OVP, UVLO, OLP, and TSD, protect the IC and the power supply from various fault conditions.

External components, such as a resonant inductor, resonant capacitor, MOSFETs, and a transformer, are required to implement a complete resonant converter. The specific values of these components depend on the desired output voltage, current, and operating frequency. Refer to the manufacturer's datasheet for detailed design guidelines and component selection recommendations.

Technical Specifications (Typical):

• Operating Voltage Range: 8.9V to 25V
• Operating Frequency: Typically 50kHz to 500kHz (depending on application)
• Operating Temperature: -20°C to +115°C
• Package: DIP-18 or SOP-18