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Benefits of multiphasing buck converters - Part 1

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darrien
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re: Benefits of multiphasing buck converters - Part 1
darrien   5/5/2013 6:20:26 PM
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Dear author Tim Hegarty and editors of EETimes. I would like to bring Your attention on the plagiarism found in the paper Pikulins D., Tjukovs S. Investigation of EMI Reduction and Output Voltage Ripple Minimization Using Interleaved Buck Converters // Scientific Journal of RTU. 7. series., Telekomunikacijas un elektronika. - 8. vol. (2008), pp 27-30. Mr. Pikulins D. and Mr. Tjukovs S. copied significant portions of text and formulas from Your article without citing the source. The paper can be found at https://ortus.rtu.lv/science/en/publications/4023/fulltext or https://ortus.rtu.lv/science/en/publications/4023

Harley Charley
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re: Benefits of multiphasing buck converters - Part 1
Harley Charley   1/25/2011 7:48:54 PM
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MAKE THAT SYNCHRONOUS RECTIFICATION. YATAHAY

Harley Charley
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re: Benefits of multiphasing buck converters - Part 1
Harley Charley   1/25/2011 7:46:37 PM
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Tim: Very interesting article. Is it reasonable to implement a multiphase buck with ZVC quasi-resonate mode and with syncronous rectification? YATAHAY

darrien
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re: Benefits of multiphasing buck converters - Part 1
darrien   8/15/2010 6:04:30 PM
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Dear author, Tim Hegarty, I have found out that your paper has been definitely plagiarized by other “authors”. To make sure please follow the links: https://ortus.rtu.lv/science/en/publications/4023/fulltext or https://ortus.rtu.lv/science/en/publications/4023

darrien
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re: Benefits of multiphasing buck converters - Part 1
darrien   4/6/2010 7:03:41 PM
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Hello, Dear Author, Browsing the Internet and finding useful information on interleaved buck converters I have revealed that your paper was definitely plagiarized by other ?authors?. To make sure, please follow the following links: https://ortus.rtu.lv/science/lv/publications/4023-Investigation+of+EMI+reduction+and+ output+voltage+ripple+minimization+using+interleaved+buck+converters or https://ortus.rtu.lv/science/lv/publications/4023/fulltext In my opinion there is one page (the second one) copied from you without citation.

vbiancomano
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re: Benefits of multiphasing buck converters - Part 1
vbiancomano   3/3/2008 8:19:31 PM
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Thank you for bringing this issue to my attention. Equation 7 actually includes the inductor ripple current term and I will delete "neglecting inductor ripple current" from the text preceding equation 7. An earlier version of the text had the simplified version of the equation, which neglected the DiL term. In any case, the ripple current has very little impact on the final result. With respect to your design problem, the calculations as provided by author Hegarty are as follows : D = 1.8/12 = 0.15 m = floor(N x D) = floor(8 x 0.15) = floor(1.2) = 1 Icin,rms = Io sqrt ( (D ? m/N) ((m+1)/N ? D) ) = Io sqrt ( (0.15-1/8) (2/8-0.15) ) = Io sqrt (0.025 x 0.1) = 0.05 Io Thus, the input capacitor RMS current is approximately 8 amps. Regards, Vince Biancomano

Otto9876
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re: Benefits of multiphasing buck converters - Part 1
Otto9876   2/29/2008 7:56:04 PM
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Should m = floor (N * D)? floor (N D) doesn't make much sense. The statement above equation 7 states that it neglects inductor ripple current. But equation 7 has a (delta IL) variable. Does a design example exist using equation 7, I'm designing and 8 phase buck converter, 1.8V@160A out , 12Vin, . I'm assuming m = 1 this results in an imaginary number for ICin,rms. Any help would be appreciated in calculating the proper amount of input ripple current. Using some very basic equations I'm coming up with 57A of input ripple that seems way to high.

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