STMicroelectronics has introduced VIPer222, a flexible and rugged controller for high-voltage converters up to 8W. It is the first in ST’s highly integrated controller family to contain a 730V avalanche-rugged power stage, ensuring superior reliability. The other features of VIPer222 include short-circuit protection, thermal protection, pulse skipping protection, soft start, and circuitry to manage burst-mode operation for enhanced efficiency at light load.
With integrated features including an error amplifier, current-sensing MOSFET, and high-voltage start-up circuitry, the new controller brings small size, low cost, and versatility to applications such as home appliances, building-automation devices, smart lighting, and smart meters.
The popular topologies in which VIPer222 can be used include non-isolated flyback converters, isolated flyback converters with primary-side regulation or secondary-side regulation using a photo-coupler, buck converters, and buck-boost converters.
Minimizing external BoM and simplifying converter design, the product can operate in a wide operating voltage (VCC) range of 4.5V-30V, which allows the device to be easily powered whatever the desired output voltage. Its low start-up voltage of 30V DC permits a wide input-voltage range and eases starting at low supply voltages. VIPer222 consumes light-load power of less than 40mW that simplifies meeting eco-design guidelines and allows the use of small filter components.
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