WIDE INPUT RANGE FULL-BRIDGE RESONANT CONVERTER
Publication Date: 2016-Nov-30
The IP.com Prior Art Database
LLC resonant converter is getting more popular because of its simple structure and soft switching characteristics for both switch and rectifier. Particularly, in high power high voltage application, the resonant converter concept becomes essential because of a large leakage inductance of the transformer caused by high insulation voltage requirement. However, as the input voltage range gets wider, the switching frequency, fsw, variation range also gets wider, which increases the passive component size. In order to relieve this drawback, this disclosure presents a wide input range LLC resonant converter based on full-bridge inverter. By suitably changing the switching pattern of the full-bridge inverter, the LLC resonant converter can operate over a wide input voltage range with a narrow fsw variation.