* Power on Soft Start Reducing MOSFET VDS Stress * Frequency shuffling for EMI * Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design * Ul.

PWM switching frequency at normal operation is internally fixed and is trimmed to tight range. At no load or light load.

UTC UC3883 is a highly integrated current mode PWM control IC optimized for high performance, low standby power and cost effective offline flyback converter applications. PWM switching frequency at normal operation is internally fixed and is trimmed .

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