Continuous Input Current Isolated Resonant LED Driver With Wide Input Voltage Range
Bibliographic record
Abstract
In this article, an isolated resonant light-emitting diode (LED) driver featuring inherent constant output current characteristic at fixed frequency operation is presented. The LED current is regulated using the main switches operating duty cycle within a wide input voltage range variation while the integrated step-up structure brings continuous input current with low current ripple suitable for battery operation. The proposed isolated CLLC resonant network incorporates the transformer magnetizing and leakage inductances as the main resonant components leading to a lower number of magnetic components while improving the power density. Also, the zero-voltage-switching operation for the main switches and zero-current switching of the rectifier diodes are realized in the entire input voltage range. A detailed theoretical analysis of the proposed LED driver is presented. To verify the analysis and effectiveness of the proposed topology, a 100-W laboratory prototype with input voltage range of 35–60 V dc is designed and implemented for 48-V dc automotive applications which delivers 1 A current to a high brightness light emitting diode string including 30 series LEDs.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".