VIPER25 | Product - STMicroelectronics

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Product overview

Description

VIPER25 is an off-line converter with an 800 V rugged power section, a PWM control, double levels of overcurrent protection, overvoltage and overload protections, hysteretic thermal protection, soft-start and safe auto-restart after any fault condition removal. Burst mode operation and device very low consumption helps to meet the standby energy saving regulations. The quasiresonant feature reduces EMI filter cost. Brownout and brown-in function protects the switch mode power supply when the rectified input voltage level is below the normal minimum level specified for the system. The high voltage start-up circuit is embedded in the device.

All features
800 V avalanche rugged power section

Quasi-resonant (QR) control for valley switching operation

Standby power < 50 mW at 265 Vac

Limiting current with adjustable set point

Adjustable and accurate overvoltage protection

On-board soft-start

Safe auto-restart after a fault condition

Hysteretic thermal shutdown
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Circuit Diagram

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.

Choose design tool:

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

Choose design tool:

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.

• Possibility to add heat sources, heat sinks, copper areas and thermal paths.

• Powerful server-side engine for rendering and simulation.

• Thermal results shown graphically via 2D table.

Thermal-electrical Simulators for Components

AC Switches Simulator

• Select ratings and application waveforms

• Get junction temperature and blocking voltage graphs

• Search and sort suitable devices

Thermal-electrical Simulators for Components

Rectifier Diodes Simulator

• Select ratings and application waveforms

• Estimate power losses

• Search and sort suitable devices

Thermal-electrical Simulators for Components

Twister Sim

• Help select the right ViPOWER Automotive power device

• Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis

• Supports various PCB configurations

Thermal-electrical Simulators for Components

TVS Simulator

• Specify system ratings and surge waveform

• Search and sort suitable devices

Thermal-electrical Simulators for Components

Estimate

• Build simple schematics and firmware inputs in minutes

• Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs

Choose design tool:

Signal Conditioning Design Tool

Active Filters

• Handles multi-stage-designs and common topologies

• Returns circuit component values

• Provides gain, phase and group delay graphs

• Low Pass, High Pass and Band Pass

Signal Conditioning Design Tool

Comparators

• Handles most common configurations

• Returns circuit components values

• Provides I/O signal waveforms

• 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.

Choose design tool:

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

• Enter antenna parameter and matching target

• Select the topology of the matching network

• The tool returns component values for the desired design targets

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All resources

Expand all categories

Available documentation resources
	Resource title	Version	Latest update	Actions	Details	Download

SPICE models (1)

	Resource title	Version	Latest update	Actions	Update date	Options
ZIP	Check to add to the download list VIPer25 PSpice models	1.0	10 Jan 2017	ZIP	10 Jan 2017 VIPer25 PSpice models 1.0

SIMPLIS models (1)

	Resource title	Version	Latest update	Actions	Update date	Options
ZIP	Check to add to the download list VIPER25 SIMPLIS examples schematics	2023.12	21 Dec 2023	ZIP	21 Dec 2023 VIPER25 SIMPLIS examples schematics 2023.12

Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Longevity Commitment	Longevity Starting Date	Material Declaration**
VIPER25HD	Active	SO-16	Industrial	Ecopack2	10	2026-02-26T00:00:00.000+01:00
VIPER25HDTR	Active	SO-16	Industrial	Ecopack2	10	2026-02-26T00:00:00.000+01:00
VIPER25LD	Active	SO-16	Industrial	Ecopack2	10	2026-02-26T00:00:00.000+01:00	PDF XML
VIPER25LDTR	Active	SO-16	Industrial	Ecopack2	10	2026-02-26T00:00:00.000+01:00	PDF XML

VIPER25HD

Package:

SO-16

Material Declaration**:

VIPER25HDTR

Package:

SO-16

Material Declaration**:

VIPER25LD

Package:

SO-16

Material Declaration**:

VIPER25LDTR

Package:

SO-16

Material Declaration**:

(**) 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

Marketing Status

Budgetary Price (US$)*/Qty

Order from ST

Order from distributors

Package

Packing Type

RoHS

Country of Origin

ECCN (US)

ECCN (EU)

Operating Temperature (°C) (min)

Operating Temperature (°C) (max)

Transistor Breakdown Voltage (V) (min)

Drain Current (A) (nom)

R_DS(on) (Ω) (max)

Available at distributors

Distributor availability of VIPER25HD

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

Available at distributors

Distributor availability of VIPER25LD

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

Available at distributors

Distributor availability of VIPER25HDTR

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

Available at distributors

Distributor availability of VIPER25LDTR

Distributor Name	Region	Stock	Min. Order	Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

Buy from Distributor

VIPER25HD Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

VIPER25LD Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

VIPER25HDTR Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

VIPER25LDTR Active

Budgetary Price (US$)*/Qty:

-

Available at distributors

No availability of distributors reported, please contact our sales office

Buy Direct at ST

Add Free Sample

Package:

Packing Type:

RoHS:

Country of Origin:

ECCN (US):

ECCN (EU):

(*) 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