STMicro’s VIPer Converter Boasts High MOSFET Breakdown Voltage

July 30, 2019 Alix Paultre

The STMicroelectronics VIPer26K high-voltage converter integrates a 1050V avalanche-rugged N-channel power MOSFET, enabling offline power supplies to offer a wide input voltage range in a simplified design. The high voltage rating eliminates the need for conventional stacked FETs and associated passive components to achieve similar voltage capability, and smaller external snubber components can be adopted. Drain current-limit protection is built-in and the MOSFET includes a senseFET connection for over-temperature protection.

With high-voltage startup circuitry, a built-in error amplifier, and current-mode PWM controller all integrated on-chip, the VIPer26K can support all common switched-mode power supply topologies, including isolated flyback with secondary-side or primary-side regulation, non-isolated flyback with resistive feedback, buck, and buck-boost converters.

Additional benefits include internally fixed switching frequency of 60kHz, jittered ±4kHz, combined with control of the MOSFET gate current during turn-on and turn-off to minimize switching-noise emissions. Offering high power-conversion efficiency and a no-load consumption of less than 30mW, the VIPer26K is available in an SO-16N package, priced from $0.64 for 1000-piece orders.

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