A study on low-profile DC-DC converter module by applying electromagnetic induction type wireless power transmission and bluetooth feedback controller

We proposed slim type DC to DC converter modules based on wireless power transmission technology, and 500W class prototype was produced with applying the technology on Switching power supply converter designing. The wireless power transmission technology is actively studied in these days to increase isolated voltage of transformer. The power transmitting transformer was fixed on ceramic centered multi-layer PCB to increase efficiency and to lower height of the prototype. Also, winding wire of the transformer was designed with PCB patterns to minimize the height. And wireless power transmission technology is important for the output compensation circuit, so we applied for Bluetooth technology. The Specification of the prototype was 400V of input voltage; 1 Mhz of switching frequency; output voltage control through Bluetooth system. Even though wireless power transmission structured transformer was used, the power transmission efficiency was relatively high.