SD7530 is a high power factor flyback PWM controller special for LED lighting applications. SD7530 features a high performance analog multiplier for power factor correction (PFC), zero current detector (ZCD) to ensure TM operation. It integrates a current sensing comparator with built-in leading-edge blanking, and a totem-pole output stage capable of -600mA /800mA current suited for big MOSFET. SD7530 has a built-in soft-start circuit to avoid the over voltage output under light load start, reduce MOSFET’s voltage stress, and improve circuit’s reliability. SD7530 has a built-in output short-circuit protection circuit, in this way the current of the system is considerably reduced to avoid the damage to IC. SD7530 includes VCC under voltage lockout, VCC over voltage protection, over temperature protection, and AC input undervoltage and over-voltage protection, etc. SD7530A has the same function and parameters with SD7530, except AC input undervoltage/overvoltage protection. (Unless otherwise stated, this document is only for SD7530)