Abstract:
본 발명은 제품 사용시 AC 전원 입력단을 통해 제품에 서지전압 또는 서지 전류 등이 인가된 경우 이를 효과적으로 방전시켜 서지로부터 제품을 보호하는 서지 보호회로를 구비한 전원장치에 관한 것으로, 입력 전원단의 각 전원 라인 간에 방전 패턴을 구비하여, 상기 입력 전원단의 각 전원 라인으로 입력된 서지 전압을 각각 방전하는 방전부; 및 상기 입력 전원단으로 입력된 전원을 사전에 설정된 전원으로 변환하여 공급하는 전원 공급부를 포함하는 서지 보호 회로를 구비한 전원 장치를 제안한다.
Abstract:
The present invention relates to a power supply apparatus having a lightning protection function, which comprises an AC input connector with a neutral line and a live line; a serial lightning protection unit which is connected between a frame ground and at least one of the neutral line and the live line to bypass surge voltage caused by lightning to the frame ground; and a parallel lightning protection unit which is connected between the neutral line and the live line to decrease the level of the surge voltage caused lightning between the neutral line and the live line.
Abstract:
PURPOSE: A light emitting driving apparatus is provided to eliminate inconvenience to reset an LED driver circuit in the replacement of an LED by adding constant voltage control to a constant current control technique. CONSTITUTION: An LED driving part(100) drives a lighting emitting area(LP) according to the detection value of the lighting emitting area. A current detecting part(200) detects a detection voltage(Vd) which corresponds to the size of the driving current flowing in the lighting emitting area. The current detecting part includes sensing resistance which is connected between the ground and the cathode terminal of the lighting emitting area. A detection part(300) includes a first comparison part(310), a second comparison part(320), a low voltage selecting part(330), and a conveying part(340). The first comparison part compares the detection voltage with a preset detection voltage reference value and outputs a first error voltage.