Product overview
Description
The VIPER26 device is a smart high voltage converter that integrates an 800 V avalanche-rugged power MOSFET with PWM current mode control. The power MOSFET with 800 V breakdown voltage allows an extended input voltage range to be applied, as well as the size of the DRAIN snubber circuit to be reduced.
This IC meets the most stringent energy-saving standards with very low consumption and burst mode operation under light load.
The design of flyback, buck and buck boost converters is supported. The integrated HV startup, sense-FET, error amplifier and oscillator with jitter allow complete application designs with a minimum number of components.
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All features
- 800 V avalanche rugged power MOSFET allowing wide range VAC input range to be covered
- Embedded HV startup and sense-FET
- Current mode PWM controller
- Minimized system input power consumption:
- Less than 30 mW @ 230 VAC in no-load condition
- Less than 400 mW @ 230 VAC with 250 mW load
- Limiting current with adjustable set point
- Jittered switching frequency to reduce the EMI filter cost:
- 60 kHz ±4 kHz (L type)
- 115 kHz ±8 kHz (H type)
- Embedded error amplifier
- Hysteretic thermal shutdown
- Built-in soft-start for improved system reliability
- Protections with automatic restart: overload/short-circuit (OLP), feedback loop disconnection
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.
Power Management Design Center
Thermal-electrical Simulators for Components
Signal Conditioning Design Tool
NFC/RFID Calculators
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
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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.
• 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
• test
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
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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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EDA Symbols, Footprints and 3D Models
STMicroelectronics - VIPER26
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 :
Symbols
Footprints
3D models
All resources
| Resource title | Version | Latest update | Actions | Details | Download |
|---|
SPICE models (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2.0 | 10 Jan 2017 | 10 Jan 2017 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| VIPER26HD | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER26HDTR | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER26HN | Active Product is in volume production. | PDIP 7 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER26LD | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER26LDTR | Active Product is in volume production. | SO-16 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 | |
| VIPER26LN | Active Product is in volume production. | PDIP 7 | Industrial | Ecopack2 | 10 | 2025-09-19T00:00:00.000+02:00 |
(**) 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.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | Transistor Breakdown Voltage (V) (min) | Drain Current (A) (nom) | RDS(on) (Ω) (max) | ||
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| VIPER26LN | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER26LD | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER26HN | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER26LDTR | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER26HD | | | distributors No availability of distributors reported, please contact our sales office |
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| VIPER26HDTR | | | distributors No availability of distributors reported, please contact our sales office |
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VIPER26LN Active
Budgetary Price (US$)*/Qty:
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distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
VIPER26LD Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
VIPER26HN Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
VIPER26LDTR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
VIPER26HD Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
Package:
Packing Type:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):
VIPER26HDTR Active
Budgetary Price (US$)*/Qty:
-
distributors
No availability of distributors reported, please contact our sales office
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