STMicroelectronics recently released VIPer222 controller for high-voltage converters up to 8W, bringing small size, low cost and versatility to applications such as home appliances, building automation devices, smart lighting and smart meters.
With integrated features including an error amplifier, current-sensing MOSFET, and high-voltage startup circuitry, the VIPer222 can be used in a wide variety of popular converter topologies. These 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.
The VIPer222 is the first in ST’s highly integrated controller family to contain a 730V avalanche-rugged power stage, ensuring superior reliability. Short-circuit protection, thermal protection, pulse skipping protection, soft start, and circuitry to manage burst-mode operation for enhanced efficiency at light load are also provided.
Further features minimize external BoM and simplify converter design. These include a wide operating voltage (VCC) range of 4.5V-30V, which allows the device to be easily powered whatever the desired output voltage. The low startup voltage of 30V DC permits a wide input-voltage range and eases starting at low supply voltages. Light-load power consumption of less than 40mW simplifies meeting eco-design guidelines, and the jittered PWM controller allows the use of small filter components.
The VIPer222 is in production now and available in 5mm x 4mm SSOP10 from $0.33 for orders of 1000 pieces.
Please visit www.st.com/viper222-pr for further information.
