STMicroelectronics

VIPER53SP

VIPER53SP Description

The VIPER53SP from STMicroelectronics is an obsolete but highly capable offline switch-mode power supply (SMPS) controller, designed for flyback topologies in AC/DC conversion applications. This surface-mount IC integrates a 620V breakdown voltage power MOSFET, enabling efficient operation with input voltages ranging from 8.4V to 19V and delivering up to 65W of power. Its 300kHz switching frequency ensures compact design flexibility, while isolated output and robust protection features make it suitable for demanding environments.

VIPER53SP Features

• Integrated High-Voltage MOSFET: 620V rating for reliable offline operation.
• Wide Input Range: Supports 8.4V–19V for versatile applications.
• Advanced Control: Features EN (enable), frequency control, and soft-start for smooth power management.
• Comprehensive Protection: Includes current limiting, overload, over-temperature, and short-circuit safeguards.
• High Efficiency: Up to 300kHz switching frequency reduces passive component size.
• Compliance: ROHS3 and REACH unaffected, ensuring environmental and regulatory adherence.

VIPER53SP Applications

• Industrial Power Supplies: Ideal for isolated auxiliary power in automation systems.
• Consumer Electronics: Used in adapters, LED drivers, and home appliances.
• Telecom & Networking: Provides compact, efficient power for routers and switches.
• Lighting Systems: Suitable for high-efficiency LED power modules.

Conclusion of VIPER53SP

Though obsolete, the VIPER53SP remains a robust solution for flyback-based AC/DC conversion, offering high integration, reliability, and protection in a compact form. Its 65W capability, wide input range, and compliance with environmental standards make it a preferred choice for legacy designs in industrial, consumer, and telecom applications. Engineers seeking a proven, high-performance offline switcher may still find value in existing stock or alternative STMicroelectronics replacements.