ST’s high-voltage AC-DC converters combine an advanced pulse width modulation (PWM) controller with a high-voltage power MOSFET in a single package.
This makes them ideally suited for offline switch mode power supplies (SMPS) with output power spanning from a few to a few tens of watts. The portfolio offers a wide choice of products so you can find the best fit for the most popular topologies, including quasi-resonant, flyback and buck configurations with either isolated or non-isolated implementations, backed up by an extremely large palette of protection features to make sure that even the most stringent reliability targets are met. External component count is also kept at a minimum to help you get the most out of your design at least cost.
The VIPer® high-voltage converter series is composed of monolithic ICs integrating a PWM controller and a 700 V HV vertical power MOSFET.
The VIPerPlus series features an 800 V avalanche-rugged power MOSFET and leading-edge PWM controller and consumes less than 30 mW (at 265 VAC) in standby. It also comes with the largest choice of protection schemes and supports different topologies.
The Altair series has a built-in 900 V avalanche-rugged power MOSFET and a PWM controller specifically designed for opto-less implementation, thus significantly reducing component count.

Featured Videos
New VIPer0P with unique zero-power mode
Introducing the VIPer0P high-voltage converter with jittered fixed-frequency current-mode PWM control for simplified EMI compliance and zero-power mode (ZPM) with an astounding < 4 mW (at 230 VAC) consumption. VIPer0P can enter and exit ZPM when the low voltage input/output pins (OFF or ON) are pulled to ground so a small and inexpensive safety extreme low voltage (SELV) switch can replace the bulky mains switch. The VIPer0P embeds a set of protections – including over-current protection (OCP), VCC clamp, maximum duty cycle and flux runaway – to enable a more robust and safer SMPS design.
The VIPer0p is ideal for all SMPS up to 7 W having a wide input voltage range including:
- Home appliances compliant with EuP Lot6 energy regulation
- Industrial equipment or digital consumer goods
Explore all the key benefits of the VIPer0P high-voltage converter with unique zero-power mode with the STEVAL-ISA174V1 non-isolated, flyback 6 W SMPS evaluation board.
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VIPER26
VIPerPlus family: Energy saving 12W high voltage converter with direct feedback
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VIPER31
Energy Saving Off-line High Voltage Converter
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VIPER12A-E
Fixed frequency off line converter
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VIPER26K
1050 V High voltage converter
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VIPER53-E
Fixed frequency off line converter
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VIPER35
VIPerPlus family: Quasi-resonant high performance off line high voltage converter
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VIPER17
VIPerPlus family: Fixed frequency 6W high performance off line high voltage converter
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VIPER122
High voltage converter
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ALTAIR05T-800
Off-line all-primary-sensing switching regulator
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VIPER22AS-E
Low power off-line SMPS primary switcher
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VIPER22ADIP-E
Fixed frequency off line converter
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VIPER27
VIPerPlus family: Fixed frequency 12W high performance off line high voltage converter
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VIPER11
Energy saving off-line high voltage converter
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VIPER0P
VIPerPlus family: Zero-power off-line high voltage converter
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VIPER01
VIPerPlus family: Low voltage energy saving fixed frequency high voltage converter
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VIPER25
VIPerPlus family: Quasi-resonant high performance off line high voltage converter
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VIPER28
VIPerPlus family: Peak power fixed frequency off line high voltage converter
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VIPER22A-E
Fixed frequency off line converter
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VIPER53E-E
Fixed frequency off line converter
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VIPER01B
Energy saving off-line high voltage converter
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VIPER222
High voltage converter
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VIPER06
VIPerPlus family: Energy saving high voltage converter for direct feedback
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VIPER38
VIPerPlus family: Peak power fixed frequency high voltage converter
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ALTAIR04-900
Off-line all-primary-sensing switching regulator
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VIPER37
VIPerPlus family: Fixed frequency 15W high performance off line high voltage converter
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VIPER16
VIPerPlus family: Energy saving 6W high voltage converter with direct feedback
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ALTAIR05T-800
Off-line all-primary-sensing switching regulator
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ALTAIR04-900
Off-line all-primary-sensing switching regulator
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VIPER12A-E
Fixed frequency off line converter
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VIPER22A-E
Fixed frequency off line converter
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VIPER22AS-E
Low power off-line SMPS primary switcher
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VIPER22ADIP-E
Fixed frequency off line converter
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VIPER53E-E
Fixed frequency off line converter
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VIPER53-E
Fixed frequency off line converter
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VIPER11
Energy saving off-line high voltage converter
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VIPER0P
VIPerPlus family: Zero-power off-line high voltage converter
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VIPER01
VIPerPlus family: Low voltage energy saving fixed frequency high voltage converter
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VIPER26
VIPerPlus family: Energy saving 12W high voltage converter with direct feedback
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VIPER31
Energy Saving Off-line High Voltage Converter
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VIPER25
VIPerPlus family: Quasi-resonant high performance off line high voltage converter
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VIPER28
VIPerPlus family: Peak power fixed frequency off line high voltage converter
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VIPER26K
1050 V High voltage converter
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VIPER01B
Energy saving off-line high voltage converter
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VIPER222
High voltage converter
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VIPER06
VIPerPlus family: Energy saving high voltage converter for direct feedback
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VIPER35
VIPerPlus family: Quasi-resonant high performance off line high voltage converter
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VIPER17
VIPerPlus family: Fixed frequency 6W high performance off line high voltage converter
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VIPER122
High voltage converter
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VIPER38
VIPerPlus family: Peak power fixed frequency high voltage converter
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VIPER37
VIPerPlus family: Fixed frequency 15W high performance off line high voltage converter
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VIPER16
VIPerPlus family: Energy saving 6W high voltage converter with direct feedback
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VIPER27
VIPerPlus family: Fixed frequency 12W high performance off line high voltage converter