The STMicroelectronics VIPER12AS is a highly integrated power supply IC designed for a variety of applications, particularly in the field of offline power supplies. This device is part of the VIPER family, which is known for its efficiency, compact design, and versatility in providing power conversion solutions. The VIPER12AS is particularly suitable for low to medium power applications, making it a popular choice among engineers and designers.

## Key Features

1. Integrated High-Voltage Power MOSFET: The VIPER12AS includes a built-in high-voltage power MOSFET, which simplifies the design process and reduces the number of external components required, leading to a more compact solution.

2. Wide Input Voltage Range: The device operates over a wide input voltage range, typically from 85V to 265V AC, making it suitable for global applications and ensuring compatibility with various mains voltages.

3. High Efficiency: The VIPER12AS is designed to achieve high efficiency, often exceeding 85%, which is crucial for minimizing energy consumption and heat generation in power supply applications.

4. Built-in Protection Features: The IC incorporates several protection mechanisms, including:
- Overvoltage Protection (OVP)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Short-Circuit Protection (SCP)
These features enhance the reliability and safety of the power supply.

5. Low Standby Power Consumption: The VIPER12AS is optimized for low standby power consumption, making it ideal for energy-efficient designs, particularly in applications where power conservation is critical.

6. Flexible Output Configuration: The device can be configured for various output types, including constant voltage (CV) and constant current (CC) modes, which is particularly useful for applications such as LED driving.

7. Compact Package: The VIPER12AS is available in a compact DIP-8 package, which is suitable for space-constrained applications and facilitates easy integration into existing designs.

## Specifications

- Input Voltage Range: 85V to 265V AC
- Output Power: Up to 12W in typical applications
- Switching Frequency: 65 kHz (typical)
- Efficiency: Up to 85% or higher, depending on the application
- Operating Temperature Range: -40°C to +150°C
- Protection Features:
- Overvoltage Protection (OVP)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Short-Circuit Protection (SCP)
- Package Type: DIP-8

## Applications

The VIPER12AS is suitable for a wide range of applications, including:

- Offline Power Supplies: Ideal for use in AC-DC converters for consumer electronics, appliances, and industrial equipment.
- LED Drivers: The device can be used to drive LED lighting systems, providing constant current regulation for optimal performance.
- Battery Chargers: The VIPER12AS can be employed in battery charging applications, ensuring efficient power conversion and management.
- Home Appliances: Suitable for various home appliances that require reliable and efficient power supply solutions.

## Conclusion

The STMicroelectronics VIPER12AS is a versatile and efficient power supply IC that offers a range of features and protections, making it suitable for various applications in power management. Its integrated high-voltage MOSFET, wide input voltage range, and low standby power consumption make it an excellent choice for designers looking to create reliable and energy-efficient power supply solutions. Whether used in consumer electronics, LED drivers, or industrial applications, the VIPER12AS provides a robust solution for modern power conversion needs.