New Fixed-Frequency Digital Control to Improve the Light-Load Efficiency of an Isolated Regulated Converter

Round 1

Reviewer 1 Report

The solution seems interesting, but there are known solutions with higher efficiency, exceeding 90% at very low load. In addition, in table 4, it is worth specifying the efficiencies for specific loads, because light load is a relative term.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

I strongly recommend the authors to calculate transient effects, ripple, and regulation mathematically to add and compare with the experimentally measured values. 

Literature needs improvement, as some recent studies are not seen in the literature, making it weak.

Equations have been written improperly. (see equations 17, 19, etc.) 

English improvement is also required. For example, the last sentence of the abstract requires improvement. (in terms of English grammar). 

The colors selection in figures, flow diagrams, results' figures is not good and disturbing the flow of understanding. Please better switch to black, with styles of lines. It will be far better. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

This is an interesting study and the authors proposed a new digital control method to improve the light-load efficiency under fixed-frequency control. However, notable comments to improve the paper's quality.

(1)  Abstract - Line 12 & 13: “On the other, we use the software volt-second balance method to realize the synchronous rectification at discontinuous conduction mode, which reduces the conduction loss.” Avoid using we in the abstract.

(2)  Experimental Results – Lines 376 to 379: “The efficiency curves at 28V input are shown in Figure 14. The prototype is compared with the traditional converter, which has hard-switching and Schottky rectification. At light load (0.2A to 1A), the efficiency is above 81%, which is 5% to 10% higher than the traditional converter.” What is the importance and specific applications of the proposed efficiency focus at low current (0.2A to 1A)?

(3)   A more detailed discussion of the measurement results in comparison to other works which consider light load (load current) is recommended and included in Table 4.

Author Response

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Author Response File: Author Response.pdf