A Multiphase Series-Capacitor Buck Converter with Reduced Flying Capacitor Volume and Auxiliary Start-Up Circuit
Bibliographic record
Abstract
This paper introduces a modification to the conventional multiphase series-capacitor (SC) buck converter topology that transforms it into a more suitable candidate for emerging high step-down, high current point-of-load (PoL) applications. The introduced topology reduces the total energy storage of the flying capacitors (FC), compared to an equivalently-phase conventional SC topology, as a result of lowering their respective steady-state voltages. This translates into easier procurement of capacitors and greater than 33% smaller FC volume due to lower capacitive derating. The converter also includes an unobtrusive auxiliary switch to facilitate the pre-charging of each FC to near their steady-state voltage such that the critical high current-carrying synchronous rectifiers (SR) never experience a voltage stress equal to the supply voltage. This advantageous property subsequently enables the designer to safely use lower voltage / higher figure-of-merit (FoM) SRs to boost operating efficiency. An interleaved 4-phase discrete prototype was developed for 48-V nominal input and 1.0-1.8-V output at 140-A load to confirm diminished SR voltage stress during start-up that ultimately improves efficiency at heavy-load.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".