品牌on semi型号ncp1230d65r2g 封装soic-8批号1025 类型其他ic

the ncp1230 represents a major leap towards achieving lowstandby power in medium−to−high power switched−mode poweupplies such as notebook adapte, off−line battery charge andcoumer electronics equipment. housed in a compact 8−pin package(soic−8, soic−7, or pdip−7), the ncp1230 contai all neededcontrol functionality to build a rugged and efficient power supply. thencp1230 is a current mode controller with internal rampcompeation. among the unique features offered by the ncp1230 isan event management scheme that can disable the front−end pfccircuit during standby, thus reducing the no load power coumption.the ncp1230 itself goes into cycle skipping at light loads whilelimiting peak current (to 25% of nominal peak) so that no acousticnoise is generated. the ncp1230 has a high−voltage startup circuitthat eliminates external components and reduces power coumption.the ncp1230 also features an internal latching function that can beused for ovp protection. this latch is triggered by pulling the cs pinabove 3.0 v and can only be reset by pulling vcc to ground. trueoverload protection, internal 2.5 ms soft−start, internal leading edgeblanking, internal frequency dithering for low emi are some of theother important features offered by the ncp1230.features• current−mode operation with internal ramp compeation• internal high−voltage startup current source for loss−less startup• extremely low no−load standby power• skip−cycle capability at low peak currents• direct connection to pfc controller for improved no−load standbypower• internal 2.5 ms soft−start• internal leading edge blanking• latched primary overcurrent and overvoltage protection• short−circuit protection independent of auxiliary level• internal frequency jittering for improved emi signature• +500 ma/−800 ma peak current drive capability• available in three frequency optio: 65 khz, 100 khz, and 133 khz• direct optocoupler connection• spice models available for traient and ac analysis• this is a pb−free device