Converter provides low power supplies in smart homes and industry

Designers can build a low consumption, cost-effective SMPS (switched-mode power supply) with a 5V output voltage, using the VIPER01 from STMicroelectronics.

The high-voltage power converter is suited to low-power applications in home appliances, building, lighting, and motion control, as well as small industrial and consumer applications. It operates directly from a rectified mains supply and integrates an 800V avalanche-rugged power MOSFET with PWM (pulse width modulation) current-mode control and multiple protection circuits. The converter is tailored to provide the auxiliary supply to microcontrollers in IoT devices that are permanently connected to the internet or a local network.

The device uses the proprietary BCD (Bipolar-CMOS-DMOS) technology, which allows the integration in a single chip of a PWM controller with a high-voltage logic-level control transistor, protection and diagnostic circuitry, without significantly impacting the robustness and reliability of the power transistor, says the company.

The converter enables stringent energy-saving standards, with low power consumption and switching 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 a complete application to be designed with the minimum number of external components.

The 800V avalanche-rugged power MOSFET allows a wide V AC input range and a wide supply voltage of 4.5 to 30V.

Evaluation kits, application notes, and spice models are also available.

http://www.st.com/viperplus

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