STMicroelectronics VIPerPlus VIPer31 high-voltage converter IC

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The latest addition to the VIPerPlus series, the VIPer31 compact high-voltage converter IC from STMicroelectronics enables robust power-converter solutions that should meet energy-saving eco-design norms, while saving bill-of-materials (BoM) costs.

The product is optimised for commonly used offline AC/DC converter topologies, including isolated and non-isolated flyback, buck and buck-boost converters. The compact, highly integrated IC requires minimal external components, enabling designs to be created using a small-size PCB.

Combining high conversion efficiency with no-load power consumption below 20 mW with a 230 VAC input, the device is suitable for switched-mode power supplies (SMPS) for large or small home appliances, air conditioning, smart-home or -building automation, lighting, metering and motor-control applications. The IC embeds a jittered PWM controller with 30, 60 and 132 kHz options, along with an 800 V avalanche-rugged MOSFET power section, high-voltage start-up circuit, sense FET, error amplifier for direct feedback, internal supply without auxiliary winding and a clamp-less design.

A wide Vcc supply-voltage range of 4.5 to 30 V makes it easy to power the device. The 24 VDC drain start-up voltage saves further external circuitry and allows an ultrawide AC input-voltage range, which enhances flexibility in both consumer and industrial applications. Over- and undervoltage protection, soft start, short-circuit protection, pulse-skipping protection and thermal shutdown are also built in.

For more information: http://www.st.com/viper31-pr.