AN9961DB9 无PFC80W电源方案

　　General Description The AN9961DB2_v2 demo board is the offline isolated LED driver， using AN9961 IC. The AN9961 provides control of a flyback conversion and power factor correction in a single stage. This is the cost competitive solution due to low-cost IC approach and low part count on primary and secondary side. The isolated concept ensures easy and safe installation and maintenance for street lights and Indoor lighting fixtures. Using average current feedback via optocoupler， provides a good line and load regulation （typically 《1% over line and load）。 Design is for a fixed output current and a string of about 10 LEDs in series， features protection from an output short circuit condition， load overvoltage and open circuit This demo board intended for evaluation and testing purposes only， not for high volume and/or end product usage.

　　Warning！ Working with this board can cause serious bodily harm or death. Connecting the board to a source of line voltage will result in the presence of hazardous voltage throughout the primary side of system. The board should only be handled by persons well aware of the dangers involved with working on live electrical equipment. Extreme care should be taken to protect against electric shock. Disconnect the board before attempting to make any changes to the system configuration. Always work with another person nearby who can offer assistance in case of an emergency. Wear safety glasses for eye protection. The electrolytic capacitor carries a hazardous voltage for an extended time after the board is disconnected. Check the capacitor voltage before handling the board.