Abstract: An integrated circuit for driving high-voltage LED lamps is applied to a rectified alternative current (AC) power and a plurality of LED stacks. The integrated circuit includes a control unit, a plurality of current-clamping units which electrically connect to the control unit and the LED stacks respectively, and a plurality of current-sensing units which electrically connect to the current-clamping units and the control unit. When the rectified power is switched on, the current-sensing unit constantly monitors the electrical current flowing through the respective current-clamping unit and feeds back the monitored data to the control unit. The control unit sequentially switches on or off the current-clamping units according to the combinatorial logic state of the monitored data.

Abstract: An integrated circuit for driving high-voltage LED lamps is applied to a rectified alternative current (AC) power and a plurality of LED stacks. The integrated circuit includes a control unit, a plurality of current-clamping units which electrically connect to the control unit and the LED stacks respectively, and a plurality of current-sensing units which electrically connect to the current-clamping units and the control unit. When the rectified power is switched on, the current-sensing unit constantly monitors the electrical current flowing through the respective current-clamping unit and feeds back the monitored data to the control unit. The control unit sequentially switches on or off the current-clamping units according to the combinatorial logic state of the monitored data.

Abstract: A heat exchanger includes a number of plate sets disposed one above the other or superposed with each other, and each plate sets includes an upper plate and a lower plate for forming one or more conduits between the upper and the lower plates, and for forming one or more ducts between the lower and the upper plates of different plates, the plates include an opening communicating and coupled to the conduits for receiving one heat medium, and an orifice communicating and coupled to the ducts for receiving a different heat medium and for separating the heat media from each other, and for allowing the heat media to have different flowing quantity from each other.

Abstract: A heat exchanger includes three plates disposed one above the other or superposed with each other, for forming one or more conduits between the upper and the middle plates and for forming one or more ducts between the middle and the lower plates, and for forming one or more channels below the lower plate, the plates include an opening communicating and coupled to the conduits and the ducts for receiving a medium, and the include an orifice communicating and coupled to the channel formed below the lower plate for receiving another medium and for separating the media from each other, and for allowing the media to have different flowing quantity.