P1011AP10 DIP7 original

P1011AP10 DIP7

 original

plied MonolithicSwitcher for Low Standby-Power Offline SMPSNCP1010, NCP1011,NCP1012, NCP1013,NCP1014The  NCP101X  series  integrates  a  fixed−frequency  current−modecontroller and a 700 V MOSFET. Housed in a PDIP−7 or SOT−223package, the NCP101X offers everything needed to build a rugged andlow−cost power  supply,  including  soft−start,  frequency  jittering,short−circuit protection, skip−cycle, a maximum peak current setpointand a Dynamic Self−Supply (no need for an auxiliary winding).Unlike other monolithic solutions, the NCP101X is quiet by nature:during nominal load operation, the part switches at one of the availablefrequencies  (65  −  100  −  130  kHz).  When  the  current  setpoint  fallsbelow a given value, e.g. the output power demand diminishes, the ICautomatically  enters  the  so−called  skip−cycle  mode  and  providesexcellent efficiency at light loads. Because this occurs at typically 1/4of the maximum peak value, no acoustic noise takes place. As a result,standby  power  is  reduced  to  the  minimum  without  acoustic  noisegeneration.Short−circuit detection takes place when the feedback signal fadesaway,  e.g.  in  true  short−circuit  conditions  or  in  broken  Optocouplercases.  External  disabling  is  easily  done  either  simply  by  pulling  thefeedback  pin  down  or  latching  it  to  ground  through  an  inexpensiveSCR  for  complete  latched−off.  Finally  soft−start  and  frequencyjittering further ease the designer task to quickly develop low−cost androbust offline power supplies.For improved standby performance, the connection of an auxiliarywinding  stops  the  DSS  operation  and  helps  to  consume  less  than100  mW  at  high  line.  In  this  mode,  a  built−in  latched  overvoltageprotection   prevents   from   lethal   voltage   runaways   in   case   theOptocoupler  would  brake.  These  devices  are