Semtech Introduces Industry's Only Secondary Side Synchronous Regulator to Generate Multiple Outputs from a Single Secondary WindingController IC is based on Semtech's patent-pending Combi-Sync™ technology that integrates synchronous rectification and synchronous post-regulation in a single chip Camarillo, California - February 26, 2004 Semtech Corp. (NASDAQ: SMTC), a leading supplier of analog and mixed-signal semiconductors for communications, portable devices, computers, and industrial equipment, today announced the SC4901, a secondary side synchronous regulator that can convert a transformer secondary voltage into multiple regulated DC outputs. The SC4901 is based on Semtech’s breakthrough Combi-Sync™ technology, which enables this secondary side controller to combine synchronous rectification and synchronous post-regulation for isolated outputs.
“The industry has always seen post-regulation and synchronous rectification as separate problems to be addressed with separate solutions, but the SC4901 changes that paradigm and opens up new possibilities for smaller, more efficient and cost effective power supplies,” said Scott Deuty, Semtech’s Marketing Manager of Networking and Industrial Power Management. “The ability of Semtech’s Combi-Sync technology to provide independently regulated multiple outputs has dramatically simplified post-regulation for power systems in high-performance applications like network routers and servers.” The SC4901 is self-biased from the transformer winding and also uses the transformer signal to create all of the timing functions necessary for regulation. No external bias synchronizing or drive signals are required. The SC4901 drives a back-to-back MOSFET combination that increases power conversion efficiency by eliminating the in-series rectifier diode that is the industry norm. The SC4901 can operate from a simple square wave input thus eliminating the need for a primary side regulator and the supporting circuitry across the isolation boundary. In addition, it can generate multiple regulated output voltages from a single transformer winding thus simplifying the design. The SC4901 device operates over an input voltage range of 4.5V to 18V and can operate at speeds up to 1 MHz. The device is available in a low profile, 16-pin TSSOP package. Other benefits offered by the SC4901 include:
Pricing and AvailabilityThe SC4901 is available immediately in production quantities and is priced at $1.32 each in 1,000-piece lots. Semtech offers comprehensive design assistance, including field- and factory-based support. Data sheets, volume pricing, and delivery quotes, as well as evaluation kits and samples, are available by contacting salesinfo@semtech.com. About SemtechSemtech Corporation is a leading supplier of high-quality analog and mixed-signal semiconductor products. The company is dedicated to providing customers with proprietary solutions and breakthrough technology in power management, protection, advanced communications, human interface, and test & measurement products. Publicly traded since 1967, Semtech is listed on the NASDAQ National Market under the symbol SMTC. For more information, contact Semtech Corp. at 200 Flynn Road, Camarillo, CA 93012-8790; phone (805) 498-2111; email to info@semtech.com; or visit its web site at www.semtech.com. Press ContactTerry Sears, Marketing Communications Manager, Telephone: 805.498.2111 |
The SC4901 is a single-chip solution that eliminates the need for point-of-load regulators and primary side controllers in isolated power conversion applications such as voltage regulator modules, power converter bricks, and power supplies for telecommunications and networking applications.
