内容提示: AND8242/D19 V, 3.0 A Universal Input AC-DC Adaptor Using NCP1271Prepared by: Jon Kraft and Kahou WongON Semiconductorhttp://onsemi.comAPPLICATION NOTEINTRODUCTIONThe N CP1271 is one of the latest fixed-frequencycurrent-mode PWM switching controllers with(1) adjustable Soft-Skipt ...