Global Sources
EE Times-India
Stay in touch with EE Times India
 
EE Times-India > Power/Alternative Energy
 
 
Power/Alternative Energy  

3.3V/20A post-regulator driven by the NCP4331

Posted: 03 Sep 2008     Print Version  Bookmark and Share

Keywords:NCP4331-driven  post-regulators  magnetic amplifier  conduction losses 

As of today, magnetic amplifier post-regulators (mag amp) are very popular for ATX application. However, they are the seat of important conduction losses that limit their interest in the raging struggle for energy savings.

NCP4331-driven post-regulators represent a major leap towards efficiency. Like mag amp, they can be viewed as buck converters with the ability to operate from a pulsed input voltage. However, NCP4331 driven post-regulators dramatically improves the efficiency of the power processing since:

  • They significantly reduce the conduction losses as the mag amp saturable coil is removed and the diodes are replaced by low RDS(on) N-MOSFETs (synchronous rectification)

  • The switching losses are minimised since a smart sequencing softens three out of the four switching transitions of the MOSFETs.

    This application note proposes a systematic process to design NCP4331 driven post-regulators. As an example, a 3.3V/20A board has been built and has been coupled to a 2-switch forward converter for testing.

    View the PDF document for more information.





  • Comment on "3.3V/20A post-regulator driven by th..."
    Comments:  
    *  You can enter [0] more charecters.
    *Verify code:
     
     
    Webinars

    Seminars

    Visit Asia Webinars to learn about the latest in technology and get practical design tips.

     

    Go to top             Connect on Facebook      Follow us on Twitter      Follow us on Orkut
    
     
    Back to Top