The SSD2011A is a high-voltage start-up and standby power IC manufactured by Fairchild/ON Semiconductor. This device is designed to provide a simple, efficient, and robust solution for generating bias supply voltages required in various applications, particularly in power management circuits and standby power supplies. It enables the direct start-up from a rectified high-voltage line, eliminating the need for external start-up resistors, thereby improving efficiency and reducing component count.

Applications:

• Standby power supplies
• Auxiliary power supplies in appliances
• Power management in industrial equipment
• Offline power converters
• LED lighting applications

Features:

• High-voltage start-up capability
• Integrated high-voltage current source
• Over-voltage protection (OVP)
• Over-temperature protection (OTP)
• Short-circuit protection (SCP)
• Low standby power consumption
• Soft-start feature

Benefits:

• Simplified power supply design
• Reduced component count and board space
• Improved efficiency in standby mode
• Enhanced system reliability through integrated protection features
• Lower overall system cost

The SSD2011A typically operates with a wide input voltage range, suitable for both universal AC input and DC input applications. Its integrated high-voltage current source allows for a direct connection to the rectified AC line, providing a fast and reliable start-up. The device’s protection features, such as OVP, OTP, and SCP, ensure safe operation under various fault conditions, safeguarding both the power supply and the load. The soft-start feature minimizes inrush current during start-up, further enhancing system reliability. The SSD2011A is available in a compact package, facilitating easy integration into space-constrained applications. It's commonly used in applications requiring very low standby power consumption to meet energy efficiency standards.