Power Supply

Why Choose Our Solutions

Fairchild's portfolio of products provides a complete AC/DC switch mode power supply solution for high, medium, and low power applications. These solutions help you as a designer increase efficiency by up to 96%, reduce standby power, and meet the worldwide 1W initiative—all with unequaled design simplicity. Our solutions include: SuperFET® II which have robust body-diodes and provide higher system reliability and power density, thereby reducing heat sink size, Green Fairchild Power Switches (FPS™) that offer state-of-the-art standby power to support the industry's 1W initiative, and Power Factor Correction ICs that increase system efficiency. Fairchild is the only semiconductor supplier that provides a complete portfolio for AC/DC switch mode power supplies.

Fairchild Product

mWSaver® Technology

mWSaver Technology combines our most energy efficient process and circuit technologies for power adapter design into this unique

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Fairchild Product

Flyback Converter

Find the controller that offers the optimum combination of standby power and operating efficiency for popular power levels with this reference chart.

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Fairchild Product

Interleaved PFC Controllers

Intelligent Interleaved Control that enables Unparalleled Performance, Converter Protection and Design Benefits

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Fairchild Product


Fairchild brings designers of power supplies, lighting, display and industrial applications a new generation of 600V Super-Junction MOSFETs — SupreMOS®.

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Fairchild Product

Low-Side Gate Drivers

The FAN31xx and FAN32xx series of high-speed, low-side gate drivers offers flexibility for power supply designs, providing a wide selection of performance and packaging combinations to create compact, highly efficient and reliable power supplies.

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Fairchild Product

TinyBuck® DC-DC Regulator

Fairchild's next-generation TinyBuck synchronous buck regulator family provides higher system efficiency, which helps system designers meet tough energy standards and improve battery life while reducing total cost of ownership.

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Fairchild recently added the SuperFET II MOSFET family using the latest Super Junction Technology to the high-voltage power MOSFET portfolio.

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Motion SPM® Smart Power Modules

Motion SPM® modules integrate drive and protection circuitry into a single package. Simplify and accelerate your design as you optimize efficiency.

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Fairchild Product

Dual Cool™ Packaging Technology

Fairchild Semiconductor developed the Dual Cool™ packaging for MOSFETs to meet the needs for better thermal characteristics, high current capability, high efficiency, and smaller form factors.

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Fairchild Product

Power Stage MOSFETs

Reduce Power Supply Area, Increase Power Density

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Application NoteDescription
AN-558Introduction to Power MOSFETs and their Applications
AN-8021Building Variable Output Voltage Boost PFC Converters with the FAN9612 Interleaved BCM PFC Controller
AN-4137Design Guidelines for Offline Flyback Converters using FPS™
AN-8027FAN480X PFC+PWM Combination Controller Application
AN-6083Highly Integrated, Dual-PWM Combination Controller
AN-6086Design Consideration for Interleaved Boundary Conduction Mode PFC Using FAN9611 / FAN9612
AN-FEBFAN9673_B01H2500AUser Guide for FEBFAN9673_B01H2500A Evaluation Board
AN-9067Analysis of MOSFET Failure Modes in LLC Resonant Converter
AN-5232New Generation Super-Junction MOSFETs, SuperFET® II and SuperFET® II Easy Drive MOSFETs for High Efficiency and Lower Switching Noise
AN-4178New High-Voltage SMD Package, Power88 for High-Efficiency, and Low-Profile Power Systems
AN-6099New PowerTrench® MOSFET with Shielded Gate Technology Increases System Efficiency and Power Density in Synchronous Rectification Applications
AN-4179High Voltage D2pak Package, PCB Layout Guide
AN-1031Considerations in Designing the Printed Circuit Boards of Embedded Switching Power Supplies
AN-8024Applying Fairchild Power Switch (FPS™) FSBH-series to Standby Auxiliary Power Supply
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-4148Audible Noise Reduction Techniques for FPS™ Applications
AN-4159Green Mode Fairchild Buck Switch FSL336LR
AN-41761 kV SenseFET Integrated Power Switch
AN-303HC-MOS Power Dissipation
AN-6753Highly Integrated Green-Mode PWM Controller
AN-5844Green Mode Fairchild Buck Switch FSL306LR
AN-4147Design Guidelines for RCD Snubber of Flyback Converters
ApplicationDocument NumberFeatured
Power (W)
Input Voltage
Range (VAC)
Netbook AdapterPDFRD-337
40 W90-265VACFlyback Converter
Power Supply LCD TVPDFRD-212
192 W340-400V/DCLLC Resonant Half-Bridge Converter
Power Supply LCD MonitorPDFRD-334
40 W85-265VACFlyback Converter