This highly integrated PWM controllers, SG6841 series,provides several features to enhance the performance ofow power flyback converters. To minimize standbypower consumption, the proprietary green-modefunction provides off-time modulation to linearlydecrease the switching frequency under light-loadconditions. This green-mode function assists the power
supply to easily meet the power conservationrequirement. Due to BiCMOS process, the start-upcurrent and operation current is reduced to 30uA and3mA, respectively, to improve power conversionefficiency. Large start-up resistance can be used forfurther power saving. Built-in synchronized slopecompensation ensures the stability of peak current modecontrol. A proprietary internal compensation ensuresconstant output power limit for universal AC input
voltage from 90VAC to 264VAC.