National Semiconductor Adds Low EMI, 10A Power Modules to SIMPLE SWITCHER Family

By DE Editors

National Semiconductor Corp. has introduced 12 new SIMPLE SWITCHER power modules, which drive up to 10A of output current and comply with the CISPR 22 (Class B) radiated and conducted electromagnetic interference (EMI) standard in industrial and communications infrastructure applications. 

National’s modules include new features for current sharing and frequency synchronization. For high-current intermediate rail and FPGA applications, multiple SIMPLE SWITCHER modules can be placed in parallel to achieve output currents from up to 60A. A synchronization pin enables the modules to operate at the same frequency, controlling switching noise in sensitive systems. 

“The very low EMI of National Semiconductor’s LMZ23605 solved the switching interference problem we were experiencing with a competitive product,” says Peter Algert, hardware engineering manager at LeCroy Corp., a provider of oscilloscopes, protocol analyzers and related test and measurement solutions.  “The LMZ23605 module not only eliminated the noise problem, but the package with a single die-attach pad was much easier to solder and cool.”

The new SIMPLE SWITCHER power modules are pin-to-pin compatible with other family members.  With an integrated shielded inductor, National’s 10A power modules operate up to an ambient temperature of 70°C with zero air flow.  Compliance with the CISPR 22 (Class B) radiated and conducted emissions standard ensures easy PCB design.

For more information, visit National Semiconductor and watch a video on the products     

Sources: Press materials received from the company and additional information gleaned from the company's website.