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VIPER31
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Education Design Win
Energy Saving Off-line High Voltage Converter

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Product overview

Description

The VIPER31 device is a high-voltage converter that smartly integrates an 800 V avalanche rugged power MOSFET with PWM current-mode control. The 800 V breakdown allows extended input voltage range to be applied, as well as to reduce the size of the DRAIN snubber circuit. The IC can meet the most stringent energy-saving standards as it has very low consumption and operates in pulse frequency modulation at light load. Overvoltage and undervoltage protections with separate and settable intervention thresholds are available at OVP and UVP pins respectively. UVP can also be used as a disabling input for the entire SMPS, with ultra-low residual input power consumption. Integrated HV startup, sense FET, error amplifier and oscillator with frequency jitter allow a complete application to be designed with a minimum component count. Flyback, buck and buck boost topologies are supported.

  • All features

    • 800 V avalanche-rugged power MOSFET to cover ultra-wide VAC input range
    • Embedded HV startup and sense FET
    • Current mode PWM controller
    • Drain current limit protection (OCP):
      • 710 mA (VIPER317)
      • 850 mA (VIPER318)
      • 990 mA (VIPER319)
    • Wide supply voltage range: 4.5 V to 30 V
      • < 20 mW @ 230 VAC in no-load;
      • < 430 mW @ 230 VAC, 25 0mW output load
    • Jittered switching frequency reduces the EMI filter cost:
      • 30 kHz ± 7% (type X)
      • 60 kHz ± 7% (type L)
      • 132 kHz ±7% (type H)
    • Embedded E/A with 1.2 V reference
    • Built-in soft-start for improved system reliability
    • Protections with automatic restart:
      • overload/short-circuit (OLP)
      • thermal shutdown
      • overvoltage
    • Protections without automatic restart:
      • pulse-skip protection to avoid flux runaway
      • undervoltage/disable
      • max. duty cycle
    Read more Read less

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Power Management Design Center

Thermal-electrical Simulators for Components

Signal Conditioning Design Tool

NFC/RFID Calculators

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Power Management Design Center

Power Supply Design Tool

• SMPS design, by topology, by type and by product
• PFC design with analog and digitial control
• Supports various PCB configurations
Choose type:
DC/DC
AC/DC
Solar Battery Charger

Power Management Design Center

LED Lighting Design Tool

• Handles AC-DC and DC-DC design in common topologies
• Displays interactive and annotated schematic
• Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type:
DC/DC
AC/DC

Power Management Design Center

Digital Power Workbench

• Provides a step-by-step optimized design of power section and control loop
• Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Management Design Center

Power Tree Designer

• Specify input/output power for each node in the tree
• Check for consistency
• Design each individual node
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Thermal-electrical Simulators for Components

STPOWER Studio

• Supports long mission profiles
• Provides power loss and temperature graphs
• Helps define heatsink thermal properties

Thermal-electrical Simulators for Components

PCB Thermal Simulator

• Thermal analysis of a PCB from Gerber files.
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AC Switches Simulator

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Thermal-electrical Simulators for Components

Rectifier Diodes Simulator

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Thermal-electrical Simulators for Components

Twister Sim

• Help select the right ViPOWER Automotive power device
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Thermal-electrical Simulators for Components

TVS Simulator

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Thermal-electrical Simulators for Components

Estimate

• Build simple schematics and firmware inputs in minutes
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Signal Conditioning Design Tool

Active Filters

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• Returns circuit component values
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• Low Pass, High Pass and Band Pass

Signal Conditioning Design Tool

Comparators

• Handles most common configurations
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• Inverting, Non Inverting, Window

Signal Conditioning Design Tool

Low side Current Sensing

• Returns circuit component values
• Provides current error graphs

Signal Conditioning Design Tool

High side Current Sensing

• Provides current error graphs.
• Help to select the right High side current sensing and shunt devices.
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NFC/RFID Calculators

NFC Inductance

• Input geometry and substrate properties
• Get antenna impedance

NFC/RFID Calculators

UHF Link Budget

• Enter forward and reverse link characteristics
• The tool returns link budget estimate

NFC/RFID Calculators

NFC Tuning Circuit

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Recommended for you

EDA Symbols, Footprints and 3D Models

STMicroelectronics - VIPER31

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Please select one model supplier :

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Start your design with SamacSys
Symbols

Symbols

Footprints

Footprints

3D model

3D models

All resources

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Available documentation resources
Resource title
Version
Latest update
Actions Details Download

SPICE models (1)

Resource title
Version
Latest update
Actions Options
VIPer31 spice model
1.0 15 Apr 2020
ZIP
15 Apr 2020
VIPer31 spice model 1.0

SIMPLIS models (1)

Resource title
Version
Latest update
Actions Options
VIPER31_SIMPLIS_Example_Schematics
2024.06 11 Jul 2025
ZIP
11 Jul 2025
VIPER31_SIMPLIS_Example_Schematics 2024.06

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Longevity Commitment Longevity Starting Date Material Declaration**
VIPER317HDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER317LDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER318HDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER318LDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER318XDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER319HC
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER319HCTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER319HDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER319LDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00
VIPER319XDTR
Active
SO-16 Industrial Ecopack3 10 2025-09-19T00:00:00.000+02:00

VIPER317HDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER317LDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER318HDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER318LDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER318XDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER319HC

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER319HCTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER319HDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER319LDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER319XDTR

Package:

SO-16

Material Declaration**:

PDF XML
More Info

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors

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