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전류세기 조정이 가능한 대전력 발광다이오드 광원 회로용 정전류 다이오드 제작
박화진,유순재,이용곤,김진형,한태수,Park, Hwa-Jin,Yu, S.J.,Anil, K.,Yi, Yong-Gon,Kim, J.H.,Han, T.S. 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.9
A current intensity convertible CLD chip was fabricated using small and large FET cell configuration. Pinch-off current of 8.82 mA and 11.56 mA were obtained for small and large cell in the CLD chip, respectively. Constant current was fairly maintained until the breakdown voltage of 60 V. Measured knee voltage, $V_k$ were 3.8 V and 4.5 V for small and large cell, respectively. We configured current amplifying chip with parallel connection of each cells, by connecting 8 individual large cells in parallel network, 92.0 mA of current was obtained. The pinch-off constant current of CLD chip was varied very linearly with respect to the number of parallel connected cell.
정전류다이오드를 이용한 COB 타입 LED 광원 및 조명기기 회로
박화진,유순재,박종민,김윤제,Park, Hwa Jin,Yu, S.J.,Park, Jong Min,Kim, Y.J. 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.6
Current limiting diode (CLD) was fabricated using junction field effect transistor (JFET) structured two small cells and eight large cells. Two small cells and eight large cells were connected in parallel and the obtained constant current was 110 mA. The application of CLD in each of the parallel circuits on chip on board (COB) type LED lighting source, could significantly reduce the current deviation within the parallel circuits. The applications of CLD on AC power small lighting source, battery power low voltage parallel lighting source and AC flat lighting source were investigated.