Product Overview: VIPER22ASTR from STMicroelectronics

The VIPER22ASTR is a high-performance, low-power off-line switched-mode power supply (SMPS) primary switcher IC from STMicroelectronics, designed to deliver a cost-effective and compact solution for power supply applications. This device integrates a PWM controller and a 730V rugged vertical power MOSFET in one package, providing an efficient and space-saving design.

The VIPER22ASTR operates in fixed frequency Direct Frequency Modulation (DFM) with frequency jittering for lower EMI, making it suitable for applications that require compliance with electromagnetic compatibility standards. This feature is particularly important for consumer electronics and industrial devices that must operate without interfering with other electronic equipment.

With its built-in high-voltage startup circuit, the VIPER22ASTR ensures a reliable start-up sequence and eliminates the need for external components, further reducing the overall bill of materials. The device also features several protection mechanisms, including overload protection, hysteretic thermal shutdown, and overvoltage protection, which safeguard the IC and the power supply from various fault conditions, enhancing system reliability and safety.

The VIPER22ASTR is designed for a wide range of applications, including adapters, battery chargers, set-top boxes, auxiliary power supplies, and other low-power applications where efficiency and footprint are critical. Its flexibility allows designers to use the device in various converter topologies, such as flyback, buck, or buck-boost configurations.

This IC is available in a SO-8N package, which is ideal for applications with limited space. The VIPER22ASTR operates over a wide supply voltage range and ambient temperature, ensuring consistent performance across different operating conditions.

In summary, the VIPER22ASTR from STMicroelectronics is a versatile and robust solution for designers looking to create efficient, compact, and cost-effective power supplies with minimal external components and excellent protection features.