19.9 A 2.15W 120V/230Vac to 5-to-12Vdc Offline Power Converter with Full-Duty-Cycle Input-Series Dual-Branch Converter Achieving 1088mW/${\text{cm}}^{3}$ and 87.2% Peak Efficiency
Abstract
This paper presents a$120 ~\mathrm{V} / 230 \text{Vac}$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$\mathrm{C}_{\text {REC }}$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$1088 ~\text{mW} / \text{cm}^{3}$power density are achieved.
Fields of Study & Subjects
Advanced DC-DC Converters
Wireless Power Transfer Systems
Multilevel Inverters and Converters
Publication details
- Journal / source
- Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
- Pages
- 336–338
- Publication date
- 15 February 2026
- Language
- EN