The VIPER12 from STMicroelectronics is a compact, high-efficiency, fixed-frequency offline converter with an integrated 60 kHz oscillator. This primary switcher IC is designed for a wide range of applications, particularly for power supplies where low energy consumption in standby mode is a critical parameter.

Key Features

• Extended Voltage Range: It operates over a wide input voltage range from 85V to 265V AC, making it suitable for universal mains operation.
• Low Power Consumption: The VIPER12 integrates a high-voltage startup circuit that enables a quick and efficient startup while keeping the standby power consumption low.
• Integrated Protections: It features multiple protection mechanisms, including Over Voltage Protection (OVP), Overload Protection (OLP), Hiccup Mode, and Thermal Shutdown, to ensure reliable operation under fault conditions.
• Pulse Frequency Modulation: This device operates in Pulse Frequency Modulation (PFM) at light load for optimized efficiency, which is essential for meeting energy-saving standards.
• Direct Drive: The VIPER12 can directly drive the power MOSFET with its integrated 500V avalanche-rugged power section.

Applications

The VIPER12 is versatile and can be used in a variety of applications, including:

• Switched Mode Power Supplies (SMPS)
• Power adapters and chargers
• Standby and auxiliary supplies
• LED lighting drivers

Advantages

This device is designed to offer a cost-effective solution for power supply design by minimizing the number of external components required. The VIPER12 is highly suitable for applications that demand efficient power conversion, low standby power, and space-saving designs. Its integrated features and protections provide a robust platform for developing reliable power supplies in consumer electronics, home appliances, and industrial control systems.

Package Options

The VIPER12 is available in several package options, including DIP-8 and SO-8, providing flexibility for various PCB layouts and space constraints.