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Arc welding is an assembling process that joins metal parts by causing their fusion through high-current flowing through the electrode and the base material. The current, either DC or AC, is generated by a specifically designed high-frequency inverter switched mode power supply (SMPS) usually based on half-bridge, full-bridge, and two-transistor forward topologies.

The main requirements in an SMPS for welding are high efficiency and reliability as well as power density to enable lighter and more compact designs.

We have a range of power MOSFETS and diodes – both Si and SiC based for higher efficiency – and IGBTs as well as galvanically isolated gate drivers and high-performance 32-bit STM32 microcontrollers to enable compact designs with higher efficiency.

welding block diagram

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Getting to know STDRIVE Gate Drivers for MOSFETs and IGBTs 
Getting to know STDRIVE Gate Drivers for MOSFETs and IGBTs 

Watch the video (03:23)
Part Number
Description
STEVAL-ISA095V1 Up to 3 A step-down switching regulator based on the ST1S14 Quick view

Key Features

  • 3 A DC output current
  • Operating input voltage from 5.5 V to 48 V
  • 850 kHz internally fixed switching frequency
  • Internal soft-start
  • Internal current limiting
  • Inhibit for zero current consumption
  • 2 mA maximum quiescent current over-temperature range
  • Thermal shutdown
  • RoHS compliant

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STEVAL-ISA099V1 3 A step-down switching demonstration board based on the L7986 in DFN10 package Quick view

Key Features

  • 3 A DC output current
  • From 4.5 V to 38 V range input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • RoHS compliant

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STEVAL-MKI137V1 LIS3MDL adapter board for standard DIL24 socket Quick view

Key Features

  • Complete LIS3MDL pinout for a standard DIL 24 socket
  • Fully compatible with the STEVAL-MKI109V2 and STEVAL-MKI109V3 motherboards
  • RoHS compliant

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STEVAL-ISA152V1 3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987 Quick view

Key Features

  • 3.3 V output voltage
  • 3 A DC output current
  • 4.5 V to 60 V input voltage
  • 500 kHz switching frequency
  • 3.5 ms programmed soft-start
  • VBIAS switch-over for improved efficiency at light load
  • 180° out of phase synchronization available
  • Open drain PGOOD available
  • Auto recovery overcurrent and thermal protection
  • RoHS compliant

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STEVAL-ISA158V1 38 V - 2 A synchronous step-down switching regulator evaluation board based on the A6986 Quick view

Key Features

  • 4 V to 38 V operating input voltage
  • Low consumption mode or low noise mode
  • 30 µA IQ at light load (LCM VOUT = 3.3 V)
  • 5 µA IQ-SHTDWN
  • Adjustable fSW (250 kHz - 2 MHz)
  • Output voltage adjustable from 0.85 V to VIN
  • Embedded output voltage supervisor
  • Synchronization
  • Adjustable soft-start time
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Peak current mode architecture
  • RDS(on)HS = 180 mΩ; RDS(on)LS = 150 mΩ
  • Thermal shutdown
  • RoHS compliant

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STEVAL-ISA172V2 2 kW fully digital AC-DC power supply (D-SMPS) evaluation board Quick view

Key Features

  • Input AC voltage: 90 V to 264 V
  • Output voltage: 48 V or 52 V, Max output current: 42 A
  • Input AC frequency: 45 Hz to 65 Hz
  • Nominal output power: 2 kW
  • Interleaved PFC stage
  • PFC switching frequency: 60 kHz
  • PFC Average current mode control
  • Cycle by cycle PFC current control
  • Maximum power factor: 0.99
  • DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
  • DC-DC switching frequency: 100 kHz
  • Overall efficiency: 80 PLUS Platinum level
  • HF transformer isolation voltage: 4 kV
  • Forced cooling with air flow speed modulation according to the output power
  • Over-temperature protection
  • Output short-circuit protection
  • PFC control & DC-DC control: managed by STM32F334C8
  • PFC power stage based on MDmesh M2 Power MOSFETs and SiC Diodes
  • DC-DC power stage based on MDmesh DM2 Power MOSFETs
  • Synchronous rectification based on STripFET Power MOSFETs
  • Active clamp circuit based on MDmesh DM2 Power MOSFETs
  • EMC filter for noise reduction
  • RoHS compliant

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EVALSTDRV600HB8 Demonstration board kit for L638xE and L639x high-voltage gate drivers Quick view

Key Features

  • Half-bridge configuration
  • High voltage rail up to 600 V
  • Includes samples of each compatible gate driver in SO8 package
    • L6385E, L6387E, L6388E, L6389E,
    • L6395, L6398, L6399
  • Compatible with MOSFETs/IGBTs in
    • DPAK, D2PAK, TO-220, TO-220FP
  • dV/dt transient immunity ± 50 V/ns in full temperature range
  • Integrated bootstrap diode
  • Dedicated high- and low-side driving inputs
  • Compact and simplified layout
  • Gate drivers in the kit features different functionalities and characteristics
    • UVLO on both - high-side and low-side
    • Internal deadtime, or no deadtime
    • Interlocking for anti cross-conduction protection
    • Ability to drive asymmetrical half-bridges and switched reluctance motors
    • Active high or active low LIN for single input gate driving

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Product Details Download databrief

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-MKI185V1 IIS2MDC adapter board for a standard DIL24 socket Quick view

Key Features

  • Complete IIS2MDC pinout for a standard DIL24 socket
  • Fully compatible with the STEVAL-MKI109V3 motherboard
  • RoHS compliant

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Product Details Download databrief

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FEATURED RESOURCES

Schematics BOM Gerber
EVAL6491HB Demonstration board for L6491 gate driver with smart shut down feature Quick view

Key Features

  • High voltage rail up to 600 V
  • dV/dt immunity: 50 V/ns in full temperature range
  • Driver current capability: 4 A source/sink
  • Comparator for fault protections
  • Smart shutdown function
  • Integrated bootstrap diode
  • Adjustable deadtime
  • Interlocking function
  • Switching times 15 ns rise/fall with 1 nF load
  • 3.3 V, 5 V TTL/CMOS inputs with hysteresis
  • Compact and simplified layout
  • Bill of material reduction
  • Effective fault protection
  • Flexible, easy and fast design

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Product Details Download databrief

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FEATURED RESOURCES

Schematics BOM Gerber
Part Number
STEVAL-ISA095V1

Up to 3 A step-down switching regulator based on the ST1S14

Quick view

Key Features

  • 3 A DC output current
  • Operating input voltage from 5.5 V to 48 V
  • 850 kHz internally fixed switching frequency
  • Internal soft-start
  • Internal current limiting
  • Inhibit for zero current consumption
  • 2 mA maximum quiescent current over-temperature range
  • Thermal shutdown
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-ISA099V1

3 A step-down switching demonstration board based on the L7986 in DFN10 package

Quick view

Key Features

  • 3 A DC output current
  • From 4.5 V to 38 V range input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-MKI137V1

LIS3MDL adapter board for standard DIL24 socket

Quick view

Key Features

  • Complete LIS3MDL pinout for a standard DIL 24 socket
  • Fully compatible with the STEVAL-MKI109V2 and STEVAL-MKI109V3 motherboards
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-ISA152V1

3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987

Quick view

Key Features

  • 3.3 V output voltage
  • 3 A DC output current
  • 4.5 V to 60 V input voltage
  • 500 kHz switching frequency
  • 3.5 ms programmed soft-start
  • VBIAS switch-over for improved efficiency at light load
  • 180° out of phase synchronization available
  • Open drain PGOOD available
  • Auto recovery overcurrent and thermal protection
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-ISA158V1

38 V - 2 A synchronous step-down switching regulator evaluation board based on the A6986

Quick view

Key Features

  • 4 V to 38 V operating input voltage
  • Low consumption mode or low noise mode
  • 30 µA IQ at light load (LCM VOUT = 3.3 V)
  • 5 µA IQ-SHTDWN
  • Adjustable fSW (250 kHz - 2 MHz)
  • Output voltage adjustable from 0.85 V to VIN
  • Embedded output voltage supervisor
  • Synchronization
  • Adjustable soft-start time
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Peak current mode architecture
  • RDS(on)HS = 180 mΩ; RDS(on)LS = 150 mΩ
  • Thermal shutdown
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-ISA172V2

2 kW fully digital AC-DC power supply (D-SMPS) evaluation board

Quick view

Key Features

  • Input AC voltage: 90 V to 264 V
  • Output voltage: 48 V or 52 V, Max output current: 42 A
  • Input AC frequency: 45 Hz to 65 Hz
  • Nominal output power: 2 kW
  • Interleaved PFC stage
  • PFC switching frequency: 60 kHz
  • PFC Average current mode control
  • Cycle by cycle PFC current control
  • Maximum power factor: 0.99
  • DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
  • DC-DC switching frequency: 100 kHz
  • Overall efficiency: 80 PLUS Platinum level
  • HF transformer isolation voltage: 4 kV
  • Forced cooling with air flow speed modulation according to the output power
  • Over-temperature protection
  • Output short-circuit protection
  • PFC control & DC-DC control: managed by STM32F334C8
  • PFC power stage based on MDmesh M2 Power MOSFETs and SiC Diodes
  • DC-DC power stage based on MDmesh DM2 Power MOSFETs
  • Synchronous rectification based on STripFET Power MOSFETs
  • Active clamp circuit based on MDmesh DM2 Power MOSFETs
  • EMC filter for noise reduction
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
EVALSTDRV600HB8

Demonstration board kit for L638xE and L639x high-voltage gate drivers

Quick view

Key Features

  • Half-bridge configuration
  • High voltage rail up to 600 V
  • Includes samples of each compatible gate driver in SO8 package
    • L6385E, L6387E, L6388E, L6389E,
    • L6395, L6398, L6399
  • Compatible with MOSFETs/IGBTs in
    • DPAK, D2PAK, TO-220, TO-220FP
  • dV/dt transient immunity ± 50 V/ns in full temperature range
  • Integrated bootstrap diode
  • Dedicated high- and low-side driving inputs
  • Compact and simplified layout
  • Gate drivers in the kit features different functionalities and characteristics
    • UVLO on both - high-side and low-side
    • Internal deadtime, or no deadtime
    • Interlocking for anti cross-conduction protection
    • Ability to drive asymmetrical half-bridges and switched reluctance motors
    • Active high or active low LIN for single input gate driving

Show More

Product Details Download databrief

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-MKI185V1

IIS2MDC adapter board for a standard DIL24 socket

Quick view

Key Features

  • Complete IIS2MDC pinout for a standard DIL24 socket
  • Fully compatible with the STEVAL-MKI109V3 motherboard
  • RoHS compliant

Show More

Product Details Download databrief

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
EVAL6491HB

Demonstration board for L6491 gate driver with smart shut down feature

Quick view

Key Features

  • High voltage rail up to 600 V
  • dV/dt immunity: 50 V/ns in full temperature range
  • Driver current capability: 4 A source/sink
  • Comparator for fault protections
  • Smart shutdown function
  • Integrated bootstrap diode
  • Adjustable deadtime
  • Interlocking function
  • Switching times 15 ns rise/fall with 1 nF load
  • 3.3 V, 5 V TTL/CMOS inputs with hysteresis
  • Compact and simplified layout
  • Bill of material reduction
  • Effective fault protection
  • Flexible, easy and fast design

Show More

Product Details Download databrief

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Image
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FEATURED RESOURCES

Schematics BOM Gerber
00 Files selected for download

Technical Documentation

    • Description Version Size Action
      		AN4929
      H series 1200 V IGBTs on 3-phase full-bridge DC-DC power converter welding machine       		1.1
      1.35 MB
      		PDF
      		AN4720
      Half bridge resonant LLC converters and primary side MOSFET selection       		1.0
      1.4 MB
      		PDF
      		AN4544
      IGBT datasheet tutorial       		1.1
      2.4 MB
      		PDF
      		AN5080
      IIS2MDC: high-accuracy, ultra-low-power, 3-axis digital output magnetometer       		2.0
      415.48 KB
      		PDF
      		AN5277
      Introduction to the new fast 650 V HB2 IGBT series on a two‑switch forward welding equipment       		1.0
      1.08 MB
      		PDF
      		AN4602
      LIS3MDL: three-axis digital output magnetometer       		1.0
      584.14 KB
      		PDF
      		AN4406
      MDmeshâ„¢ M2: the new ST super-junction technology ideal for resonant topologies       		1.0
      652.78 KB
      		PDF
      		AN4638
      Welding machines: V and HB series IGBTs on two-switch forward converters       		1.0
      724.64 KB
      		PDF
      AN4929

      H series 1200 V IGBTs on 3-phase full-bridge DC-DC power converter welding machine

      PDF
      AN4720

      Half bridge resonant LLC converters and primary side MOSFET selection

      PDF
      AN4544

      IGBT datasheet tutorial

      PDF
      AN5080

      IIS2MDC: high-accuracy, ultra-low-power, 3-axis digital output magnetometer

      PDF
      AN5277

      Introduction to the new fast 650 V HB2 IGBT series on a two‑switch forward welding equipment

      PDF
      AN4602

      LIS3MDL: three-axis digital output magnetometer

      PDF
      AN4406

      MDmeshâ„¢ M2: the new ST super-junction technology ideal for resonant topologies

      PDF
      AN4638

      Welding machines: V and HB series IGBTs on two-switch forward converters

      PDF
    • Description Version Size Action
      		TA0350
      New trench gate field-stop V series: the real tail-less IGBT       		1.0
      471.47 KB
      		PDF
      		TN0018
      Surface mounting guidelines for MEMS sensors in an LGA package       		6.0
      214.31 KB
      		PDF
      TA0350

      New trench gate field-stop V series: the real tail-less IGBT

      PDF
      TN0018

      Surface mounting guidelines for MEMS sensors in an LGA package

      PDF

Presentations & Training Material

    • Description Version Size Action
      		Power Factor Corrector controllers portfolio
      1.22 MB
      		PDF
      		SLLIMMâ„¢- nano Series 1.0
      2.81 MB
      		PDF

      Power Factor Corrector controllers portfolio

      PDF

      SLLIMMâ„¢- nano Series

      PDF

Publications and Collaterals

    • Description Version Size Action
      		1200V SiC diodes, 2 to 40 A in surface-mount and through-hole packages 1.0
      748.77 KB
      		PDF
      		650V HB series IGBTs; Innovative 4-lead package 1.0
      1.67 MB
      		PDF
      		800-1050V MDmesh™ K5 ST’s first super-junction VHV MOSFET Series 1.0
      516.44 KB
      		PDF
      		800-1700 V MDmesh K5: Very high voltage super-junction Power MOSFET series 1.0
      477.67 KB
      		PDF
      		DC-DC converters
      557.92 KB
      		PDF
      		HB series 650 V IGBTs; Trench Gate Field-stop High-speed technologies 1.0
      290.2 KB
      		PDF
      		Industrial-grade SiC diodes - 650V and low VF - to boost the performance of power converters 2.0
      958.23 KB
      		PDF
      		L6984, L6986 Energy saving synchronous DC-DC converters for industrial
      1.24 MB
      		PDF
      		ST Diodes Finder : the new app for Android and iOS 2.0
      1.46 MB
      		PDF
      		STEVAL-IPFC01V1 3 kW three-channel interleaved PFC 1.0
      693.89 KB
      		PDF

      1200V SiC diodes, 2 to 40 A in surface-mount and through-hole packages

      PDF

      650V HB series IGBTs; Innovative 4-lead package

      PDF

      800-1050V MDmesh™ K5 ST’s first super-junction VHV MOSFET Series

      PDF

      800-1700 V MDmesh K5: Very high voltage super-junction Power MOSFET series

      PDF

      DC-DC converters

      PDF

      HB series 650 V IGBTs; Trench Gate Field-stop High-speed technologies

      PDF

      Industrial-grade SiC diodes - 650V and low VF - to boost the performance of power converters

      PDF

      L6984, L6986 Energy saving synchronous DC-DC converters for industrial

      PDF

      ST Diodes Finder : the new app for Android and iOS

      PDF

      STEVAL-IPFC01V1 3 kW three-channel interleaved PFC

      PDF
    • Description Version Size Action
      		Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      		PDF

      Linear and Switching Voltage Regulators Selection Guide

      PDF
    • Description Version Size Action
      		Products and solutions for Smart industry 3.0
      2.99 MB
      		PDF
      		STM32F3 series - Mainstream 32-bit MCUs 17.09
      2.18 MB
      		PDF

      Products and solutions for Smart industry

      PDF

      STM32F3 series - Mainstream 32-bit MCUs

      PDF

Development Tools

    • Part Number
      ST MCU FINDER

      STM32 and STM8 product finder for mobile devices and desktops

      ST MOSFET Finder

      MOSFET product finder application for Android and iOS

      ST-DIODE-FINDER

      Diode product finder application for Android and iOS

      ST-IGBT-FINDER

      IGBT product finder application for Android and iOS

Embedded Software

    • Part Number
      C-Driver-MEMS

      Standard C platform-independent drivers for MEMS motion and environmental sensors

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

MEMS and Sensors

Part number Description
IIS2MDC High accuracy, ultra-low-power ,3-axis digital output magnetometer
LIS3MDL 3-axis MEMS magnetic field sensor, digital output, I2C, SPI, low power mode, high performance
Part number
IIS2MDC
High accuracy, ultra-low-power ,3-axis digital output magnetometer
LIS3MDL
3-axis MEMS magnetic field sensor, digital output, I2C, SPI, low power mode, high performance

Power Management

Part number Description
A7985A 2 A step-down switching regulator for automotive applications
A7986A 3 A step-down switching regulator for automotive applications
L6399 High voltage high and low-side driver
L6491 High voltage high and low-side 4 A gate driver
L6985F 38 V 500 mA synchronous step-down switching regulator with 30 uA quiescent current
L6986 38 V 2 A synchronous step-down switching regulator with 30 uA quiescent current
L6986F 38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent current
L7987 61 V 3 A asynchronous step-down switching regulator with adjustable current limitation
L7987L 61 V 2 A asynchronous step-down switching regulator with adjustable current limitation
ST1S14 Up to 3 A step down switching regulator
STGAP1AS Automotive galvanically isolated single gate driver
STGAP2S Galvanically isolated 4 A single gate driver
Part number
A7985A
2 A step-down switching regulator for automotive applications
A7986A
3 A step-down switching regulator for automotive applications
L6399
High voltage high and low-side driver
L6491
High voltage high and low-side 4 A gate driver
L6985F
38 V 500 mA synchronous step-down switching regulator with 30 uA quiescent current
L6986
38 V 2 A synchronous step-down switching regulator with 30 uA quiescent current
L6986F
38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent current
L7987
61 V 3 A asynchronous step-down switching regulator with adjustable current limitation
L7987L
61 V 2 A asynchronous step-down switching regulator with adjustable current limitation
ST1S14
Up to 3 A step down switching regulator
STGAP1AS
Automotive galvanically isolated single gate driver
STGAP2S
Galvanically isolated 4 A single gate driver