Product Overview: VIPER22AS by STMicroelectronics

The VIPER22AS is a high-performance, low-power offline switched-mode power supply (SMPS) primary switcher IC from the renowned semiconductor manufacturer STMicroelectronics. This compact integrated circuit is specifically designed to construct a cost-effective and space-efficient power supply unit with minimal external components, making it an ideal choice for a wide range of applications, including adapters, chargers, and standby power supplies.

Key Features

• Integrated Power MOSFET: The VIPER22AS integrates a robust power MOSFET with an 18 Ohm on-resistance, allowing for direct driving of the power stage, which simplifies the circuit design and enhances system reliability.
• Current Mode Control: This IC employs current mode PWM control, which provides excellent output voltage regulation and reduces the external component count.
• Quasi-Resonant Operation: The quasi-resonant zero-voltage switching (ZVS) topology minimizes switching losses, leading to improved efficiency and reduced electromagnetic interference (EMI).
• Wide Supply Voltage Range: The VIPER22AS operates over a broad supply voltage range, accommodating various input voltages and enabling it to be used in multiple regions without the need for voltage selection.
• Overcurrent and Overvoltage Protection: Built-in protection features safeguard the IC and the power supply from potential damage due to overcurrent and overvoltage conditions.
• Thermal Shutdown: An internal thermal shutdown feature prevents the device from overheating, thus ensuring safe operation under a range of temperature conditions.

Applications

The VIPER22AS is versatile and can be used in a variety of applications that require a small form factor and high efficiency. These include:

• Low-power AC/DC adapters
• Standby power supplies for TVs, monitors, and audio equipment
• Auxiliary power supplies for PCs and servers

With its robust design and comprehensive set of features, the VIPER22AS is a reliable and efficient solution for designers looking to create compact, energy-efficient power supplies without compromising on performance.