STMicroelectronics VIPER20A - SMPS Power Converter

The VIPER20A from STMicroelectronics is an integrated power IC designed to deliver a compact, robust and efficient solution for switched-mode power supplies (SMPS). This versatile device integrates a PWM controller and a 700V vertical power MOSFET in one package, making it ideal for a wide range of applications including battery chargers, standby power supplies, auxiliary converters, and more.

With its high-voltage capability, the VIPER20A is particularly well-suited for AC/DC converters that operate directly from the mains supply without the need for a step-down transformer. This enables the design of power supplies with a smaller footprint, reduced component count, and enhanced reliability. The device operates at a fixed 60 kHz switching frequency, which allows for a balanced trade-off between efficiency and the size of the passive components, leading to more compact power supply designs.

One of the key features of the VIPER20A is its built-in error amplifier, which provides excellent output voltage regulation. This is complemented by an array of protection features, including thermal shutdown, pulse-by-pulse current limiting, and overvoltage protection, ensuring safe operation under abnormal operating conditions.

The VIPER20A also boasts low start-up and quiescent currents, which contribute to its high efficiency and low power consumption in standby mode, a critical aspect for energy-saving applications. The device is capable of operating in burst mode, which further reduces power consumption under light-load conditions.

For ease of use, the VIPER20A is available in a Pentawatt package, which is designed for through-hole mounting, facilitating its integration into various designs. The package's heat sink tab also serves as the electrical ground, simplifying the thermal management of the device.

In summary, the VIPER20A offers a high level of integration, making it a cost-effective solution for designers seeking to minimize complexity and enhance the performance of their power supply applications. Its robustness, efficiency, and comprehensive set of features make it a reliable choice for a broad range of power conversion challenges.