OB2203 Datasheet | On-Bright

DESCRIPTION OB2203 is a highly integrated Quasi-Resonant (QR) controller optimized for high performance offline flyback converter applications. At normal load condition, it operates in QR mode with minimum drain voltage switching. To meet the CISPR-22 EMI starting at 150KHz, the maximum switching frequency is internally limited to 130KHz. It operates in PFM mode for high power conversion efficiency at light load condition. When the loading is very small, the IC operates in ‘Extended Burst Mode’ to minimize the switching loss. As a result, lower standby power consumption and higher conversion efficiency is achieved. A built-in P-channel MOSFET and its control are integrated to automatically turn on or off PFC stage according to the load conditions. When used with OB6563 (On-Bright’s PFC controller), the standby power consumption of less than 400m W can be achieved in typical 150W SMPS. OB2203 offers prehensive protection coverage including Cycle-by-Cycle Current Limiting(OCP), VCC Under...