STMicroelectronics VIPER27L - High Voltage Converter

The VIPER27L from STMicroelectronics is a robust and reliable high-voltage converter smartly designed for power supply applications. This device integrates a PWM controller and an 800 V avalanche-rugged power MOSFET, making it a compact solution for driving high-energy circuits. It is particularly well-suited for applications such as off-line power supplies for battery charger adapters, standby power supplies for TV or monitors, auxiliary supplies for motor control, and more.

The VIPER27L stands out with its energy-efficient features, including a quasi-resonant zero-voltage switching (ZVS) topology that minimizes the switching losses by ensuring the transition at the lowest voltage point of the drain-source voltage. This technology significantly enhances the overall efficiency, especially when coupled with the device's built-in soft-start capability, which also contributes to the reduction of stress on the components at startup.

With its current mode PWM controller, the VIPER27L provides excellent output voltage regulation and a fixed 60 kHz switching frequency, which simplifies the design of the EMI filter. The device also includes several protection features to ensure safe operation under a variety of conditions. These include overload protection, overvoltage protection, hysteresic thermal shutdown, and a built-in two-level overcurrent protection feature that helps prevent damage from short-circuit or overload conditions.

Another advantage of the VIPER27L is its flexibility. The device can be used in a wide range of input voltages, from 9V to 38V, and it supports both isolated and non-isolated configurations. This makes it a versatile choice for designers looking to create efficient power solutions in different applications.

Finally, the VIPER27L comes in a compact SO-16N package, which reduces the PCB footprint and simplifies the layout of the power supply. The combination of integrated features, protection mechanisms, and high energy efficiency make the VIPER27L a powerful component for any designer's power supply toolkit.