Quasi-Resonant Flyback PWM Controller

Quasi-Resonant Flyback PWM Controller OB2202 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 CAN be achieved. By On-Bright Electronics, Inc.