SG5841J

The highly integrated SG5841/J series of PWM controllers provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency at light-load conditions. This green-mode function enables the power supply to meet international power conservation requirements. To further reduce power consumption, SG5841/J is manufactured using the BiCMOS process. This allows a low start-up current, around 14µA, and an operating current of only 4mA. As a result, a large start-up resistance can be used. The SG5841/J built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary internal sawtooth power-limiter ensures constant output power limit over a wide range of AC input voltages, from 90V_AC to 264V_AC. SG5841/J provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety should an open-loop or output-short-circuit failure occur. PWM output is disabled until V_DD drops below the UVLO lower limit, then the controller starts again. An external NTC thermistor can be applied for over-temperature protection. SG5841/J is available in an 8-pin DIP or SOP package.

• Fairchild 1,000 piece Budgetary Pricing. *
• If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
• Top mark packaging information for product SG5841J is available. **

Product	Product Status	Eco Status	*Pricing	Package Type	Leads	Packing Method	Package Drawing	**Package Marking Convention	RoHS IPC1752	RoHS/REACH/JIG Certificate of Compliance
SG5841JSZ	Not recommended for new design	Green as of May 2009		SO-8	8	TAPE REEL		Line 1:$Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2:5841J Line 3:SZD