| Autor: |
Michael Hanhart, Leon Weihs, Leo Rolff, Jonas Zoche, Jan Grobe, Ralf Wunderlich, Stefan Heinen |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
IEEE Open Journal of Power Electronics, Vol 4, Pp 221-236 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2644-1314 |
| DOI: |
10.1109/OJPEL.2023.3250762 |
| Popis: |
This work introduces an integrated maximum power point tracking boost controller for photovoltaic submodule applications. The IC offers a wide input voltage range from 7 V to 24 V, whereas the output voltage is actively limited to 50 V. The presented design utilizes discrete, low-ohmic MOSFETs for the output stage and thus supports input power levels up to 144 W. The converter operates with peak-current-mode control at 300 kHz switching frequency in continuous conduction mode. During light load operation, the control transitions to direct input voltage sensing pulse-frequency-modulation (PFM) with input and output voltage dependent peak inductor current. Moreover, the low-side resistive current sense is explained in detail together with an inductor current replication circuit for precise high-side turn-off. The maximum power point tracker (MPPT) is based on an adjustable resistive sense element and a delta modulator and achieves 99.9% tracking efficiency, omitting any need for a high resolution analog-to-digital converter (ADC). In addition, the series connection of multiple DC/DC converters is examined. The peak system efficiency measures 98.4%. The application-specific integrated circuit (ASIC) is manufactured in an 0.18 µm HV-BCD process and occupies 6.25 mm2 of silicon area. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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