April 2008

Welcome to Fairchild's monthly newsletter. In this issue we highlight our latest products, articles and new information.

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Table of Contents

• New Products
• Energy Efficiency
• Application Notes
• Awards
• Events
• Fairchild in the News

Enable Highly Efficient Two-Phase SRM Motors with Fairchild's SRM-SPMTM Module

Fairchild's SRM-SPM products are the industry’s first SRM-SPM power modules for driving two-phase switched reluctance motors (SRM) in small motor applications such as vacuum cleaners.  Each SRM-SPM module, FCAS20DN60BB and FCAS30DN60BB, integrates two HVICs, one LVIC, four NPT IGBTs, four fast recovery diodes (FRDs), two bootstrap diodes, a thermistor and various protection functions in a single package. By integrating 14 fully tested power components in a compact 45mm x 28mm SIP package, these products offer 40 percent space savings. This space conservation allows designers to incorporate the controller into the SRM assembly, and improves design productivity and manufacturability. System reliability is further enhanced by incorporating protection features such as under-voltage lock-out and short circuit protection into this thermally efficient package.

Increase Efficiency in Dynamic Voltage Scaling (DVS) Applications with Fairchild's Digitally Programmable Buck Regulator

The FAN5355, an 800mA/1000mA 3MHz Buck converter, has been designed with a proprietary ultra-fast architecture that consumes very low quiescent current and yet delivers ultra-fast transient response. Typical quiescent current in PFM mode is 37µA and even with this low standby current the FAN5355 is able to provide best-in-class transient response, making the application more resilient to unexpected fluctuations in load. In addition, this architecture creates lower ripple during PFM mode, reducing system noise and drastically improving light load efficiency to 85 percent even at loads of only 1mA. For more moderate to heavy loads, careful optimization of the power train contributes to a conversion efficiency of more than 90 percent during PWM mode.

Increase Efficiency in Electronic Ballast, Power Supply and Industrial Designs with Fairchild's High Power Bipolar Junction Transistors

These 3A and 5A bipolar transistors, the FJD5553 and FJD5555, save power in electronic ballast, power supply and industrial designs due to their ultra-fast switching speeds and low saturation voltage. The FJD5555’s saturation voltage is as low as 0.5V and the FJD5553 is as low as 0.23V, which is 50 percent lower than industry alternatives. The combination of low saturation voltage and high switching speed positively contributes to overall efficiency. Both the FJD5555 and the FJD5553 feature a high breakdown voltage (1050V), which is particularly important for lighting applications that need a wide safe operating area. These transistors are packaged in ultra-compact DPAK packaging (64mm²) to conserve space in electronic ballast and power supply designs.
 

Increase Efficiency in Smart Phones, PDAs and Other Applications with Fairchild's LDO Regulator

The FAN2560 is a linear low-dropout (LDO) regulator with a split-supply architecture. Separate bias and supply inputs allow the bias to be taken directly from the battery, while the input is taken from a lower pre-regulated source. This feature allows a smaller differential voltage between the input and the output, which provides greater efficiency over a wider range. The FAN2560 is available in a fixed-voltage output, 5-bump, WLCSP package.

Maximize Power Conversion Efficiency in DC-DC Power Supplies with Fairchild's 30V MOSFETs
        
These products integrate a MOSFET with a Schottky diode using Fairchild's monolithic SyncFET^TM technology.  These MOSFETs provide low R_DS(ON) and low gate charge to maximize power conversion efficiency.  These devices are ideal as synchronous rectifiers for DC-DC converters, notebook V_CORE low side switches and Point of Load (POL) switches.

Fairchild Semiconductor is a leading global provider of semiconductor technology that powers electronic products and allows them to become more energy efficient.

The need to reduce energy consumption continues to drive the adoption of energy-saving technologies.  Nowhere is this more apparent than in power supplies.  The average household has between five and twelve appliances that use a power supply.  Many of these power supplies are plugged in, but not in active use.  In this standby mode, these appliances consume nearly five percent of residential energy per year - over $3.5 billion. By increasing the efficiency of these power supplies and implementing techniques that reduce standby power, this wasted energy can be reduced.

See how Fairchild's products maximize energy savings in power supplies and other power-sensitive applications:

Fairchild's Power Page  

AN-4105 Design Considerations for Switched Mode Power Supplies Using a Fairchild Power Switch (FPS(TM)) in a Flyback Converter     

Join Fairchild at PCIM Europe!

PCIM Europe will take place in Nuremberg, Germany from May 27-29.  In Hall 12, Booth 601, Fairchild Semiconductor will highlight its AC-DC, DC-DC and lighting solutions that lower standby power, increase efficiency, increase power factor and conserve space.

Fairchild Paper Presentation:
"An Asymmetric Half-Bridge Converter with Current Doubler using a New Self-Driven Synchronous Rectifier."
Thursday, May 29, 2008, 2:30 pm - 3:00 pm
Room: London

Fairchild Forum Presentations:

Designing a Greener World: Synchronous Rectification and Resonant Converter Solutions from Fairchild Semiconductor
Wednesday, May 28, 2008, 11:20 am - 11:40 am
Hall 12, Booth 366

Lighting a Greener World: LED Lighting Solutions from Fairchild Semiconductor
Thursday, May 29, 2008, 10:40 am - 11:00 am
Hall 12, Booth 366

Click here for more information

Fairchild µSerDes™ Serializer/Deserializer Receives Best Product Award from Portable Design China

The FIN324C received Best Product Award from the readers of Portable Design China (PDC), a key industry publication, in its Portable Power Management Devices Readers Survey 2008. This serializer/deserializer reduces flex cable size, power consumption and electromagnetic interference (EMI) in cellular phones and small display applications.

Visit Fairchild's Awards Page for More Information

Fairchild Semiconductor Joins Alliance to Save Energy

Fairchild became a member of the Alliance to Save Energy. The Alliance promotes energy efficiency worldwide to achieve a healthier economy, a cleaner environment and greater energy security. As a member of the Alliance, Fairchild will work together with other member companies and nonprofit organizations to promote and invest in energy efficiency as a primary means of achieving environmental goals.

For more information

Published in www.semiapps.com

Power Stage Integration: Welcome Friend or Elusive Foe?

Published in Electronic Products

Design Interleaving PFC Boost Power Stages

Published in Elektronik Informationen

A Power Supply for High Power LEDs