An isolated DC-DC converter operating at 80MHz was presented. Very high frequency isolation was provided by a coreless printed circuit board transformer. The cross coupled tank and coreless PCB transformer formed a sustaining oscillation. The Schottky diodes were used as rectification devices. The voltage feedback loop was used to stabilize the output voltage. The design of coreless PCB transformer and the simulation of overall circuit were implemented by the FEM tool and EDA software. Experimental results showed that the output voltage was 3.3 V , the power was 0.3W, and the converter efficiency was about 43%.
; 赵婷; 屈操; 马春宇
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