资 源 简 介
OB2203 is a highly integrated Quasi-Resonant (QR)controller opTImized for high performance offlineflyback converter applicaTIons.At normal load condiTIon, it operates in QR modewith minimum drain voltage switching. To meet theCISPR-22 EMI starTIng at 150KHz, the maximumswitching frequency is internally limited to 130KHz.It operates in PFM mode for high power conversionefficiency at light load condition. When the loading isvery small, the IC operates in ‘Extended Burst Mode’to minimize the switching loss. As a result, lowerstandby power consumption and higher conversionefficiency is achieved.A built-in P-channel MOSFET and its control areintegrated to automatically turn on or off PFC stageaccording to the load conditions. When used withOB6563 (On-Bright’s PFC controller), the standbypower consumption of less than 400mW can beachieved in typical 150W SMPS.
