Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title High Frequency Dual Mode Control LLC Resonant Converter with Wide Input Voltage Range
Authors Hyung-Ik Joo ; Jung-Woo Yang ; Kang-Ta Jo ; Sang-Kyoo Han ; Suk-Chin Sakong
DOI 10.6113/TKPE/2016.21.2.102
Page pp.102-110
ISSN 1229-2214
Keywords LLC Resonant converter; High frequency; PWM; ZVS; Dual mode control
Abstract In this paper, a high-frequency dual mode control LLC resonant converter with wide input voltage range is proposed through zero voltage switching (ZVS) under the universal line input voltage and every load conditions. Conventional small power adapter driving should be satisfied with universal line input voltage because it has no power factor correction circuit regulation. The conventional LLC resonant converter for an adapter can reduce the size of transformer in terms of high-frequency driving and ZVS. However, this converter has a disadvantage in terms of design of resonant tank under various input voltages because the frequency modulation range is very wide to satisfy voltage conversion gain. Compared with the conventional one, the proposed LLC converter can be adapted to universal line input voltage and high-frequency driving because it is controlled by pulse width modulation and pulse frequency modulation with control voltage. The validity of the proposed LLC converter is proved through the 60 W prototype.