New Product Introduction

STMicroelectronics VIPer26K

VIPer26K - 1050 V high voltage converter with a PWM current mode control

STMicroelectronics VIPer26K converter - top view

The device is a high voltage converter smartly integrating a 1050 V avalanche-rugged power section, with a PWM current mode control. The 1050 V-BV power MOSFET allows to extend input voltage range, and reduce the size of the DRAIN snubber circuit. This IC meets the most stringent energy-saving standards as it has very low consumption and operates in burst mode under light load.

The integrated HV startup, sense-FET, error amplifier and oscillator with jitter allow a complete application to be designed with the minimum number of components.
The VIPer26K supports the most common SMPS topologies such as: isolated flyback with optocoupler, primary-side regulation, non-isolated flyback with resistive feedback, buck, and buck boost.


Key features

  • 1050 V avalanche-rugged power MOSFET allowing ultra-wide VAC input range to be covered
  • Embedded HV startup and sense-FET
  • Current mode PWM controller
  • Drain current limit protection:
    • -500 mA (VIPER265K)
    • -700 mA (VIPER267K)
  • Jittered switching frequency reduces the EMI filter cost: 60 kHz ± 4kHz
  • Standby power < 30 mW at 230 VAC
  • Embedded E/A with 3.3 V reference
  • Safe auto-restart after a fault condition
  • Hysteretic thermal shutdown
  • Built-in soft-start for improved system reliability



  • SMPS for energy metering
  • Auxiliary power supplies for 3-phase input industrial systems
  • LED lighting
  • Air conditioning


Evaluation tools

  Part number Description
STMicroelectronics STEVAL VP26K01B evaluation board - top view STEVAL-VP26K01B 15 V / 100 mA high voltage buck converter reference design based on VIPER26K
STMicroelectronics STEVAL VP26K01F evaluation board - top view STEVAL-VP26K01F Three output isolated flyback converter for STCOMET smart meter and PLC system using VIPER267KDTR
STMicroelectronics STEVAL VP26K02F evaluation board - top view STEVAL-VP26K02F Two output isolated SSR flyback converter for smart meter and PLC systems using VIPER267KDTR
STMicroelectronics STEVAL VP26K03F evaluation board - top view STEVAL-VP26K03F Double output isolated PSR flyback converter for smart meter and PLC systems using VIPER267KDTR



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