The highly integrated FAN6300A/H PWM controller provides several features that enhance the performance of flyback converters. FAN6300A is applied in quasi-resonant flyback converter with maximum operating frequency below 100 kHz. FAN6300H is suitable for high frequency operation (up to 190kHz). The built-in HV start-up circuit can provide higher start-up current to reduce the start-up time of the controller. Once V