The VIPER22ADIP is a high-performance, low-power offline switched-mode power supply (SMPS) primary switcher IC from STMicroelectronics, designed to deliver a cost-effective and compact solution for power supply circuits. Housed in a DIP-8 package, this versatile integrated circuit is engineered to drive a conventional bipolar switching transistor in a wide array of applications, including adapters, chargers, and stand-by modes for TVs and monitors, to name a few.

At the heart of the VIPER22ADIP is its fixed 60 kHz switching frequency with a quasi-resonant operation that ensures reduced EMI emissions and an improved efficiency profile. This feature, combined with the built-in soft-start functionality, helps in minimizing the stress on the components during the initial power-up phase, which significantly enhances the reliability and longevity of the entire power supply unit.

The device incorporates several protection features that safeguard the power supply and the load from various fault conditions. These include thermal shutdown with automatic restart, overvoltage protection, and overload protection. The overload protection is implemented via a frequency foldback mechanism, which reduces the switching frequency under overload conditions, thereby limiting the output power and preventing damage.

Furthermore, the VIPER22ADIP boasts a very low startup current (typically 30 µA) and an operating current under 5 mA, which makes it an excellent choice for energy-saving applications. Its built-in error amplifier along with an adjustable output voltage enables precise regulation, ensuring a stable power supply for sensitive electronic devices.

With its robust design and integrated features, the VIPER22ADIP from STMicroelectronics is an ideal choice for designers looking to create efficient, reliable, and cost-effective power solutions for both consumer and industrial electronics.

Key Features:

• Fixed 60 kHz internal oscillator
• Low startup and operating currents
• Extended quasi-resonant operation
• Built-in protections: thermal shutdown, overvoltage, and overload
• Soft-start capability
• Adjustable output voltage
• DIP-8 package for easy implementation