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  • 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.

    Key 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):
      • 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% (X type)
      • 60 kHz ± 7% (L type)
      • 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

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS13285
      Energy saving offline high voltage converter
      2.0
      1.09 MB
      PDF
      DS13285

      Energy saving offline high voltage converter

    • Description Version Size Action
      AN4564
      Is a positive power supply mandatory for my application, or could a negative output work also?
      1.0
      384.04 KB
      PDF
      AN4564

      Is a positive power supply mandatory for my application, or could a negative output work also?

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      VIPer31 spice model 1.0
      448.37 KB
      ZIP

      VIPer31 spice model

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Power Management Guide 07.2020
      7.15 MB
      PDF
      VIPerPlus - Bring a Plus to your SMPS design 05.2020
      481.54 KB
      PDF
      VIPerPlus evaluation boards 05.2018
      1,002.52 KB
      PDF

      Electric vehicle (EV) ecosystem

      Power Management Guide

      VIPerPlus - Bring a Plus to your SMPS design

      VIPerPlus evaluation boards

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
VIPER318HDTR
Active
SO-16 Industrial Ecopack3
VIPER318LDTR
Active
SO-16 Industrial Ecopack3
VIPER319XDTR
Active
SO-16 Industrial Ecopack3

VIPER318HDTR

Package:

SO-16

Material Declaration**:

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER318LDTR

Package:

SO-16

Material Declaration**:

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack3

VIPER319XDTR

Package:

SO-16

Material Declaration**:

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

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Marketing Status
RDS(on) (Ω) (max)
Transistor Breakdown Voltage (V) (min)
Drain Current (A) (nom)
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
VIPER319XDTR No availability of distributors reported, please contact our sales office SO-16 Tape And Reel
Active
3.5 800 0.85 EAR99 THAILAND
VIPER318HDTR Available at 2 distributors

Distributor availability ofVIPER318HDTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-07-03

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-03

Buy now SO-16 Tape And Reel
Active
3.5 800 0.85 EAR99 THAILAND 0.464 / 1k
VIPER318LDTR No availability of distributors reported, please contact our sales office SO-16 Tape And Reel
Active
3.5 800 0.85 EAR99 THAILAND 0.464 / 1k

VIPER319XDTR

Package

SO-16

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

Marketing Status

Active

Budgetary Price (US$)* / Qty

RDS(on) (Ω) (max)

3.5

Transistor Breakdown Voltage (V) (min)

800

Drain Current (A) (nom)

0.85

ECCN (US)

EAR99

Country of Origin

THAILAND

VIPER318HDTR

Package

SO-16

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.464 / 1k

Distributor availability ofVIPER318HDTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 1000 1 Order Now

Distributor reported inventory date: 2020-07-03

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-03

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.464 / 1k

RDS(on) (Ω) (max)

3.5

Transistor Breakdown Voltage (V) (min)

800

Drain Current (A) (nom)

0.85

ECCN (US)

EAR99

Country of Origin

THAILAND

VIPER318LDTR

Package

SO-16

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.464 / 1k

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.464 / 1k

RDS(on) (Ω) (max)

3.5

Transistor Breakdown Voltage (V) (min)

800

Drain Current (A) (nom)

0.85

ECCN (US)

EAR99

Country of Origin

THAILAND

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