Welding Machine

Fairchild is committed to being a technology and business partner for you during a long product life cycle. We're focused on high-end technology development, quality and reliability. Our portfolio of power solutions is broad and deep, and offers crucial cost- and energy-saving products that address the demanding requirements of a diverse range of low, medium and high power welding machine design requirements—high efficiency, high switching frequency while decreasing size and weight. 

Design Advantages

  • High-end IGBT technology offers optimum performance where low conduction and switching losses are essential—even at high current levels
  • Rectifier provides low voltage drop as well as fast reverse recovery time and softness factor
  • Integrated FPS™ series enables the auxiliary (aux) power design to achieve lower standby power losses with compact size and reliability
  • Optically isolated gate drivers offer wide operating voltage range and high common-mode transient immunity
  • High-voltage gate drivers have excellent noise immunity and low power consumption

Welding Machine Block Diagram

Our family of building blocks for Welding Machine systems includes:

Application NoteDescription
AN-6206Primary-Side Synchronous Rectifier (SR) Trigger Solution for Dual-Forward Converter
AN-4150Design Guidelines for Flyback Converters Using FSQ-Series Fairchild Power Switch (FPS™)
AN-4146Design Guidelines for Quasi-Resonant Converters Using FSCQ-Series Fairchild Power Switch (FPS™)
AN-6069Application Review and Comparative Evaluation of Low-Side Gate Driver
AN-400ALow-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback
AN-6032FAN4800 Combo Controller Applications
AN-8027FAN480X PFC+PWM Combination Controller Application
AN-6083Highly Integrated, Dual-PWM Combination Controller
AN-6076Design and Application Guide of Bootstrap Circuit for High-Voltage Gate-Drive IC
AN-42047Power Factor Correction (PFC) Basics
AN-6086Design Consideration for Interleaved Boundary Conduction Mode PFC Using FAN9611 / FAN9612
AN-4151Half-Bridge LLC Resonant Converter Design Using FSFR-Series Fairchild Power Switch (FPS™)
AN-FEBFAN9673_B01H2500AUser Guide for FEBFAN9673_B01H2500A Evaluation Board
AN-4165Design Guideline for 3-Channel Interleaved CCM PFC Using the FAN9673 5 kW CCM PFC Controller
AN-4164Design Guideline for 3-Channel Interleaved CCM PFC Using the FAN9673 2.5 kW CCM PFC Controller
AN-9725Robust Body Diode Characteristics of the Latest Power MOSFETs, UniFET™ II for Resonant Converters
AN-7536FCS Fast Body Diode MOSFET for Phase-Shifted ZVS PWM Full Bridge DC/DC Converter
AN-9056Using Fairchild Semiconductor Dual Cool™ MOSFETs
AN-7017Reducing Power Losses in MOSFETs by Controlling Gate Parameters
AN-8024Applying Fairchild Power Switch (FPS™) FSBH-series to Standby Auxiliary Power Supply
AN-4153Designing Asymmetric PWM Half-Bridge Converters with a Current Doubler and Synchronous Rectifier using FSFA-Series Fairchild Power Switches (FPS™)
AN-4140Transformer Design Consideration for Offline Flyback Converters Using Fairchild Power Switch (FPS™)
AN-4141Troubleshooting and Design Tips for Fairchild Power Switch (FPS™) Flyback Applications
AN-4159Green Mode Fairchild Buck Switch FSL336LR
AN-7520Numerical Method for Evaluating IGBT Losses
AN-7517Practical Aspects of Using PowerMOS Transistors to Drive Inductive Loads
AN-9020IGBT Basic II
AN-7531Implementing A Primary Side Peak-Current-Mode Half-Bridge Converter
AN-7505Improved IGBTs with Fast Switching Speed And High-Current Capability
AN-7512Parallel Operation Of Insulated Gate Transistors
AN-6753Highly Integrated Green-Mode PWM Controller
AN-FEBFSL306LRN-CS03User Guide for FEBFSL306LRN_CS03U01A Evaluation Board
AN-9016IGBT Basics 1
AN-5844Green Mode Fairchild Buck Switch FSL306LR
AN-9742Devices selection guide for Half-Bridge Welding Machine [IGBT & Diode]
ApplicationDocument NumberFeatured
Power (W)
Input Voltage
Range (VAC)
Power Supply LCD MonitorPDFRD-203
49.2 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-330
25.4 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-331
29.6 W85-265VACFlyback Converter
Home AppliancePDFRD-L044
0.5 W85-265VACBuck-Boost Converter
Home AppliancePDFRD-L043
7.08 W85-265VACBuck
18.1 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-334
40 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-204
60 W85-265VACFlyback Converter
Power Supply LED PDP TVPDFRD-267
4.16 W85-265VACFlyback Converter