A 2.15W 120V/230Vac to 5-to-12Vdc Offline Power Converter with Full-Duty-Cycle Input-Series Dual-Branch Converter Achieving 1088mW/cm3 and 87.2% Peak Efficiency
Gang Liu (Southern University of Science and Technology , The Chinese University of Hong Kong, Shenzhen)
Junmin Jiang (Southern University of Science and Technology )
Sijun Du (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Xun Liu (The Chinese University of Hong Kong, Shenzhen)
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Abstract
This paper presents a 120V/230Vac to 5-to-12Vdc offline power converter consisting of a capacitor-drop AC-DC rectifier and a full-duty-cycle input-series dual-branch DC-DC converter for IoT devices. The proposed converter operates at full-duty-cycle with VCR of D/2 and reduces both the CREC volume and the voltage stress on components, while achieving high efficiency across a broad input and output voltage range. 87.2% peak efficiency, 2.15W output power, and 1088mW/cm3 power density are achieved.
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