The VIPER12A is an offline high-voltage converter IC (Integrated Circuit) manufactured by STMicroelectronics. It is specifically designed for low-power, non-isolated flyback converters commonly used in applications such as LED lighting, auxiliary power supplies, and low-power adapters. Here are some key features and specifications of the VIPER12A:
Topology: The VIPER12A is typically used in a flyback topology, which is a type of switched-mode power supply (SMPS).
Input Voltage Range: It can operate with a wide input voltage range, making it suitable for various input voltage conditions.
Output Power: The output power capability depends on the specific application and design but is generally used for low to moderate power levels.
Switching Frequency: The VIPER12A operates at a fixed or adjustable switching frequency, allowing designers to optimize the trade-off between size and efficiency in their applications.
Built-in MOSFET: The IC integrates a high-voltage startup MOSFET, reducing the need for additional external components and simplifying the design.
Frequency Jittering for EMI Reduction: The IC incorporates frequency jittering to reduce electromagnetic interference (EMI), which helps in meeting regulatory standards.
Over-Temperature Protection: The VIPER12A includes over-temperature protection to safeguard the device during extreme operating conditions.
Overcurrent Protection: The IC may include overcurrent protection to prevent damage in case of a fault condition.
Auto-Recovery Short-Circuit Protection: In the event of a short circuit, the VIPER12A may have auto-recovery protection to resume normal operation after the fault is cleared.
Soft-Start Function: Some versions of the VIPER12A include a soft-start function to limit inrush current during startup.
Package: The IC is typically available in a small package to facilitate compact and efficient designs.
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