National Semiconductor introduces Industry’s First Full-bridge PWM Controllers

15 APRIL 2011

National Semiconductor Corp. introduced the industry’s first full-bridge pulse width modulation (PWM) controllers to integrate all four primary-side bridge MOSFET gate drivers. The LM5045 and LM5046 are well-suited for delivering higher efficiency and higher power density in quarter-brick and eighth-brick power modules used in a variety of high input voltage communications infrastructure applications. National is showcasing the LM5045 and LM5046 at the Applied Power Electronics Conference and Expo (APEC) in Fort Worth, Texas, March 6-10. APEC is one of the industry’s leading conferences for practicing power electronics professionals. Members of National’s Power Wise® energy-efficient product family, the LM5045 and LM5046 PWM controllers ease the design of full-bridge topology-based power converters into small form factor power supplies by reducing the number of external power components needed with existing full-bridge solutions. The LM5045 PWM controller contains all of the features necessary to implement a conventional full-bridge topology power converter using either current mode or voltage mode control. For applications requiring zero-voltage switching (ZVS) to minimize electro-magnetic interference (EMI) due to switching noise, the LM5046 PWM controller contains all the features necessary to implement a phase-shifted full-bridge topology.

National Semiconductor
www.national.com

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