Local-area network access switches provide high-speed connectivity, applications, and communications systems that efficiently and securely manage bandwidth-intensive data, voice, video, and wireless applications. Switches are much more popular than routers inside one intranet due to its faster mechanism of data transferring and exchanging. Fairchild plays a key role in offering the following solutions in the switch system.  

Design Advantages

  • Design circuit simplified with high voltage start-up circuit internal
  • Input Under-Voltage Lockout (UVLO) / Output Over-Voltage Protection (OVP)
  • Thermal Shutdown (TSD) Protection / Short-Circuit Detection
  • Excellent efficiency / small form factor
  • Pulse skipping for frequency limiting operation under light load condition
  • Save board space and reduce manufacturing cost
  • PowerTrench® MOSFET technology enables high-power density for high efficiency solutions providing the lowest RDS ON available, improved FOM and lower power dissipation.
  • TinyBuck® POL regulators with integrated PWM controller, driver and MOSFETs optimize performance and energy savings.
  • High-voltage SuperFET® II super-junction MOSFETs provide robust body diode performance for designs requiring high-power density, system efficiency and reliability.
  • Extensive portfolio of board level Analog and Mixed signal ICs that can facilitate your design work.
Application NoteDescription
AN-4138Design Considerations for Battery Charger Using Green Mode Fairchild Power Switch (FPS™)
AN-4121Design of Power Factor Correction Circuit Using FAN7527B
AN-4129Green Current Mode PWM Controller FAN7601
AN-6073FAN6751 Highly Integrated Green-Mode PWM Controller
AN-4107Design of Power Factor Correction Using FAN7527
AN-6075Compact Green-Mode Adapter Using FSQ500L for Low Cost
AN-8035Design Consideration for Boundary Conduction Mode Power Factor Correction (PFC) Using FAN7930
AN-1025Maximum Power Enhancement Techniques for SuperSOT™-3 Power MOSFETs
AN-9005Driving and Layout Design for Fast Switching Super-Junction MOSFETs
AN-7533A Revised MOSFET Model With Dynamic Temperature Compensation
AN-5054Low Noise Leadless Packages Advance Portable Designs
AN-7012FPF2100/7 Evaluation Board Users Guide
AN-4137Design Guidelines for Offline Flyback Converters using FPS™
AN-6067Design and Application of Primary-Side Regulation (PSR) PWM Controller
AN-8033Design Guideline for Primary Side Regulated (PSR) Flyback Converter Using FAN103 and FSEZ13X7
AN-6093Design Guideline for Flyback Charger Using FAN104WMX
AN-FEBFAN104WMXUser Guide for FEBFAN104WMX-T06U005A Evaluation Board
AN-42036PCB Grounding System and FAN2001/FAN2011 High Performance DC-DC Converters
AN-600Understanding Latch-up in Advanced CMOS Logic
AN-6094AN-6094 Design Guideline for Flyback Charger Using FAN302HL/UL
AN-400ALow-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback
AN-7019Limiting Cross-Conduction Current in Synchronous Buck Converter Designs
AN-6224Applying FAN6224 for Flyback and Forward Freewheeling Rectification
AN-6747Applying FAN6747 to Control a Flyback Power Supply with Peak Current Output
AN-6755Design Guideline to Replace FAN6753 with FAN6755W
AN-6756Applying FAN6756 to Control a Flyback Power Supply with Ultra-Low Standby Power
AN-1029Maximum Power Enhancement Techniques for SO-8 Power MOSFETs
AN-5232New Generation Super-Junction MOSFETs, SuperFET® II and SuperFET® II Easy Drive MOSFETs for High Efficiency and Lower Switching Noise
AN-FEBFDMQ8203-13WUser Guide for FEBFDMQ8203_13 W GreenBridge™ Evaluation Kit for Power Over Ethernet 13 W Flyback DC-DC
AN-4154MOSFETs for 60 W High-Power PoE Applications
AN-FEBFDMQ8203-25WUser Guide for FEBFDMQ8203_25 W GreenBridge™ Evaluation Kit for Power Over Ethernet 25 W Flyback DC-DC
AN-7534A New PSPICE Electro-Thermal Subcircuit For Power MOSFETs
AN-1028Maximum Power Enhancement Techniques for SOT-223 Power MOSFETs
AN-1026Maximum Power Enhancement Techniques for SuperSOT™-6 Power MOSFETs
AN-9760PCB Design Guidance for SPM®
AN-7017Reducing Power Losses in MOSFETs by Controlling Gate Parameters
AN-5064TCLow Icct Analog Switches for Ultra-Portable Designs (Traditional Chinese)
AN-9073High-Speed USB Switch Layout Considerations
AN-9752Design Guidelines for New-Generation FPS™ FSB-Series
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-5007An Introduction to Fairchild Switch Products
AN-996Using the Fairchild Switch as a 5V to 3V Translator
AN-5008FSTU - Undershoot Protected Fairchild Switch Family
AN-6018Fairchild USB Switch Advantage
AN-6019Fairchild Analog Switch Products ESD Test Methodology Overview
AN-6022TCUsing the FSUSB30/31 to Comply with USB 2.0 Fault Condition Requirements Traditional Chinese
AN-6022Using the FSUSB30 to Comply with USB 2.0 Fault Condition Requirements
AN-3001Optocoupler Input Drive Circuits
AN-6861Applying FAN6861 to Control a Flyback Power Supply with Surge Current Output
AN-88CMOS Linear Applications
AN-376Logic-System Design Techniques Reduce Switching-CMOS Power
AN-6846Applying SG6846 to Control a Flyback Power Supply with Surge Current Output
AN-6902Applying SG6902 to Control a CCM PFC and Flyback/PWM Power Supply
AN-6005Synchronous Buck MOSFET Loss Calculations with Excel Model
AN-7500Understanding Power MOSFETs
AN-6932Applying SG6932 to Control a PFC and Forward/PWM Power Supply
AN-42007Safety, EMI and RFI Considerations
AN-3005Design Fundamentals for Phototransistor Circuits
AN-6753Highly Integrated Green-Mode PWM Controller
AN-393Transmission-Line Effects Influence High-Speed CMOS
AN-4145Electromagnetic Compatibility for Power Converters
AN-9074C Family Characteristics
AN-389Follow PC-Board Design Guidelines For Lowest CMOS EMI Radiation
AN-680Dynamic Threshold for Advanced CMOS Logic
AN-77CMOS, The Ideal Logic Family
AN-6741Flyback Power Supply Control with the SG6741
AN-377DC Noise Immunity of CMOS Logic Gates
AN-4147Design Guidelines for RCD Snubber of Flyback Converters
ApplicationDocument NumberFeatured
Power (W)
Input Voltage
Range (VAC)
Cell Phone ChargerPDFRD-336
3.9 W90-265VACPrimary-Side Regulated Flyback Converter
Cell Phone ChargerPDFRD-315
5 W90-265VACPrimary-Side Regulated Flyback Converter
Smart Phone ChargerPDFRD-FAN104WMD-T06U005A
5 W90-264VACPrimary-Side Regulated Flyback
10 W90-264VACPrimary-Side Regulated Flyback
Notebook AdapterPDFRD-311
65 W90-264VACFlyback Converter
Netbook AdapterPDFRD-337
40 W90-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-203
49.2 W85-265VACFlyback Converter
PC Standby PowerPDFRD-304
20 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-330
25.4 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-331
29.6 W85-265VACFlyback Converter
18.1 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-334
40 W85-265VACFlyback Converter
Power Supply LCD MonitorPDFRD-204
60 W85-265VACFlyback Converter
Cell Phone ChargerPDFRD-350
5 W90-264VACPrimary-Side Regulated Flyback