DAP018D Datasheet | onsemi

features , the device takes advantage of the auxiliary winding negative swing to let the user adjust the maximum power the converter can deliver in high line conditions (OPP). When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically freezes the peak current and reduces its switching frequency down to 25 k Hz. At this point, if further output power reduction occurs, the controller enters skip- cycle. The DAP018X features an efficient protective circuitry which, in presence of an overcurrent condition, disables the output pulses while the device enters a safe burst mode, trying to re- start. Once the fault has gone, the device auto- recovers. By implementing a timer to acknowledge a fault condition, independently from the auxiliary supply, the designer’s task is eased when stringent fault mode conditions need to be met. A dedicated input helps triggering a latch- off circuitry which permanently disables output pulses, for instance to implement an over voltage protection (OVP). A separate input accepts a direct NTC connection to ground for a simple and efficient over temperature protection (OTP). Features Typical Applications - High Power ac- dc Converters for TVs, Set- top Boxes etc. - Offline Adapters for Notebooks 14 1 x A WL Y WW G SOIC- 14 D SUFFIX CASE 751A = Device Version = Assembly Location = Wafer Lot = Year = Work Week = Pb- Free Package 14 DAP018x AWLYWWG 1 MARKING DIAGRAM PIN CONNECTIONS OPP OVP CTimer Jittering Fold FB CS 1 2 3 4 5 6 7 14 13 12 11 10 9 8 HV NC OTP BO(B&D) VCC DRV GND - Fixed- frequency 65 k Hz (A and B versions) or 100 k Hz - - - - - - - (C and D versions) Current- mode Control Operation Internal and Adjustable Over Power Protection (OPP) Circuit Frequency Foldback down to 25 k Hz and Skip- cycle in Light Load Conditions Reduced Internal...