STMicroelectronics VIPER25LN - Low Power Off-Line SMPS Primary Switcher

The VIPER25LN from STMicroelectronics is a cutting-edge, energy-efficient power conversion IC designed for switched-mode power supplies (SMPS). As part of the VIPerPlus family, this device integrates a high-voltage power MOSFET with a PWM controller, delivering a compact and robust solution for power supply applications.

One of the standout features of the VIPER25LN is its low-power capabilities. It operates in a very low standby power mode, making it an ideal choice for applications where energy conservation is critical. This feature is particularly beneficial in meeting the stringent requirements of energy-saving regulations.

The VIPER25LN is capable of delivering up to 12W of power in wide-range mains operation and up to 18W in single-range mains operation, making it suitable for a variety of low-power applications. Its built-in MOSFET with an 800V avalanche-rugged technology ensures reliable operation even under harsh conditions, providing an extended lifespan and enhanced safety for electronic devices.

Flexibility is another key advantage of the VIPER25LN. It offers multiple protection features, including overload protection, overvoltage protection, and thermal shutdown with automatic restart. These protections ensure that the power supply remains safe and reliable, preventing damage to both the power supply and the connected load.

The VIPER25LN also includes a frequency jittering feature that helps to reduce electromagnetic interference (EMI), ensuring compliance with international EMI standards. This is particularly important for applications sensitive to noise, such as audio/visual equipment, home appliances, and office electronics.

Designed with simplicity in mind, the VIPER25LN enables a reduced component count and a more straightforward design process. Its extended VDD voltage range allows for direct connection to the rectified mains voltage, simplifying the power supply design and reducing overall costs.

In summary, the VIPER25LN from STMicroelectronics is a highly efficient and reliable solution for low-power SMPS designs, offering a unique combination of power-saving features, robust protection, and EMI reduction capabilities, all within a compact and versatile package.