Designed for low power applications, including home appliances, building, lighting, and motion control, as well as small industrial and consumer applications, the VIPER01 operates from a rectified mains supply and integrates an 800V avalanche rugged Power MOSFET with pulse-width modulation (PWM) current mode control and multiple protection circuits. The converter provides the auxiliary supply to MCUs in IoT devices that are permanently connected to the Internet or a local network.
Part of the VIPerPlus family of high voltage converters, the VIPER01 looks to exploit ST’s proprietary Bipolar-CMOS-DMOS (BCD) technology. BCD can integrate, in a single chip, protection, diagnostic circuitry and a PWM controller with a high voltage logic level control transistor, without impacting on the reliability of the power transistor.
The VIPER01 switches automatically to pulse frequency modulation under light load conditions. It can be used in fly-back, buck, and buck-boost converter topologies, while the integrated high voltage start up, sense-FET, error amplifier, and oscillator with jitter allow an application to be designed with the minimum number of external components.
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