SANTA CLARA, Calif. and AUSTIN, Texas , April 6 /PRNewswire-FirstCall/ — National Semiconductor Corp. (NYSE: NSM) and Silicon Laboratories Inc. (Nasdaq: SLAB) today announced a new quarter-brick isolated DC-DC converter evaluation board and reference design to help power supply designers get higher power density in networking, communications and high-end server applications.
Featuring National Semiconductor's LM5035C pulse-width modulation (PWM) controller and Silicon Labs' Si8420 ISOpro™ digital isolator, the isolated DC-DC converter evaluation board provides power supply designers with a highly efficient 100W reference design in a quarter-brick form factor.  The evaluation board reduces the time required for product characterization and design adaptation to the customer's specific requirements.
“National's LM5035C half-bridge PWM controller enables industry leading power density and performance advantages for small form factor DC-DC converters by integrating the bias regulator, gate drivers and synchronous rectifier controls into a single IC,” said Jim MacDonald , marketing director for National Semiconductor's Infrastructure Power business unit. Â “The reference design with Silicon Labs enables even further power density improvements by combining industry-leading power control and isolation technology.”
The reference design demonstrates a viable 36V to 75V input half-bridge converter for power module or embedded power applications. Â The design survives input transients up to 100V as commonly required in communications equipment and protects the power distribution system with hiccup-mode fault protection.
“Silicon Labs' patented ISOpro digital isolation products provide significant performance advantages including lower power, industry-leading EMI performance and world-class reliability using standard CMOS process technology,” said Mark Thompson , vice president and general manager of Silicon Labs' Embedded Mixed Signal products. Â “The reference design with National Semiconductor validates our industry-leading digital isolation technology and puts our customers on the fast track to developing power modules for their embedded applications.”
National Semiconductor LM5035C PWM Controller
National's LM5035C half-bridge PWM controller delivers power density and performance advantages for small form factor isolated DC-DC converter modules. Â The LM5035C has been optimized for use with digital isolators to provide further power density improvements.
National's LM5035C PWM controller includes integrated 2A half-bridge gate drivers and SyncFET outputs that control the secondary-side synchronous rectifier MOSFETs through the Si8420 digital isolator. Â Dead time between the main and synchronous rectifier on/off transitions is adjustable with a single external resistor. Â For more information about National's LM5035C PWM controller, visit http://www.national.com/pf/LM/LM5035C.html. Â Watch a video of the LM5035C at http://bit.ly/LM5035C.
Silicon Labs Si8420 ISOpro Digital Isolator
Silicon Labs' ISOpro family of digital isolators employs digital RF technology to communicate data across an isolation barrier. Â Using the Silicon Labs Si8420 digital isolator in place of pulse transformers eliminates numerous design issues such as duty cycle limitations and non-monotonic decay of output during shutdown. Â In addition, use of digital isolators improves efficiency and saves board space by eliminating the need for pulse transformers.
For more information about digital isolators from Silicon Labs, visit http://www.silabs.com/pr/isopro.
Availability and Pricing
The quarter-brick reference design is available now at no charge for download from http://www.national.com/rd/RDhtml/RD-183.html. Â The evaluation board is priced at $135 . Â To purchase the evaluation board, visit http://www.national.com/store/view_item/index.html?nsid=LM5035CEVAL.
About National Semiconductor
National Semiconductor is a leader in analog power management technology. Â Its products include easy-to-use integrated circuits, PowerWise products that enable more energy-efficient systems, and SolarMagic products which improve the energy output of solar arrays. Â The company celebrated its 50th anniversary last May. Â Headquartered in Santa Clara, Calif. , National reported sales of $1.46 billion for fiscal 2009. Â Additional information is available at www.national.com.
About Silicon Laboratories
Silicon Laboratories is an industry leader in the innovation of high-performance, analog-intensive, mixed-signal ICs. Developed by a world-class engineering team with unsurpassed expertise in mixed-signal design, Silicon Labs' diverse portfolio of highly-integrated, easy-to-use products offers customers significant advantages in performance, size and power consumption. These patented solutions serve a broad set of markets and applications including consumer, communications, computing, industrial and automotive.
Headquartered in Austin, TX , Silicon Labs is a global enterprise with operations, sales and design activities worldwide. Â The company is committed to contributing to our customers' success by recruiting the highest quality talent to create industry-changing innovations. Â For more information about Silicon Labs, please visit www.silabs.com.
National Semiconductor and PowerWise are registered trademarks of National Semiconductor Corporation. Â All other trademarks are the property of their respective owners.
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SOURCE National Semiconductor Corp.
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