The chip provides a very comprehensive and excellent intelligent protection function, including periodic over-current protection (external adjustable), overload protection, soft start function. Through the hybrid technology of hi mode, eco mode and burst mode and the low power structure technology of special devices, the ultra-low standby power consumption and the best efficiency in the full voltage range are achieved. Good EMI performance is fully guaranteed by frequency modulation technology and softdriver technology. The chip also has a built-in intelligent high voltage start module. Cxac8580 provides an advanced implementation platform for flyback switching power supply system with high cost performance and ultra-low standby power consumption, which is very suitable for the application of five level energy efficiency lever5, eur2.0 and energy star