| Title |
Two Stage High Step-Up Converter for Low Input Voltage and High Current Applications |
| Authors |
Young-Jae Noh ; Han Xu ; Cheol-Ha Kang ; Eun-Soo Kim ; Sang-Ho Jang |
| DOI |
10.6113/TKPE/2012.17.6.507 |
| Keywords |
wide input voltage variable ranges; LLC resonant converter; flyback converter; planar transformer |
| Abstract |
DC-DC converter which composed of LLC resonant converter, operated by fixed switching frequency with fixed duty cycle (50%), and flyback converter to provide constant output voltage(400VDC) with variation of input voltage(30-60VDC) is proposed in this paper. To obtain constant output voltage(400VDC), flyback converter is not operated in case of above the maximum input voltage(60VDC) and operated as the input voltage decreases to below 60VDC. Therefore, flyback converter can be designed to the 50% power rating of the maximum power in the proposed DC-DC converter. Operation modes and voltage gain characteristics were analyzed and a 360W prototype converter was tested to verify the proposed converter. |