A Low-Cost Cell-Level Differential Power Processing CMOS IC for Single Junction Photovoltaic Cells

Amoorezaei, Afshin; Khajehoddin, S. Ali; Rezaei, Nasrin; Moez, Kambiz

doi:10.1109/tpel.2021.3089551

Cited by 4 publications

(2 citation statements)

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“…Table . 2 provides a performance comparison to similar state-of-the art converter topologies. The ratio of output to input voltage plays an immanent role for all DC/DC converter architectures which are directly connected to a PVpanel in terms of shading tolerance, in contrast to the DPP approach of [12], [21] and [22]. Thus, in DPP architectures, the operable current range determines the overall system performance for nonuniform insolation.…”

Section: Comparisonmentioning

confidence: 99%

“…The MPPT implementation of [24] maximizes the duty cycle of all converters and thus their output voltage, but this approach requires an additional global MPPT for the whole system. Simpler implementations, such as [22] equalize the voltage of all PV-cells, which is no true MPP-tracking and less accurate. Reference [14] reaches 99.9 % tracking efficiency only for input power levels larger than 46 % of P max .…”

Section: Comparisonmentioning

confidence: 99%

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An Integrated 50 V Boost Controller With Digitally-Assisted MPPT for Submodule PV Applications

Hanhart

Rolff

Zoche

et al. 2023

IEEE Open J. Power Electron.

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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 peakcurrent-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 mm 2 of silicon area.

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Section: Comparisonmentioning

confidence: 99%

Section: Comparisonmentioning

confidence: 99%