SG6858

This highly integrated PWM controller provides several special enhancements designed to meet the low standby power needs of low-power SMPS. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency under light-load conditions. This green-mode function enables the power supply to meet even the strictest power conservation requirements.      The BiCMOS fabrication process enables reducing the start-up current to 10µA and the operating current to 2.5mA. To further improve power conservation, a large start-up resistance can be used. Built-in synchronized slope compensation ensures the stability of peak current mode control. Proprietary internal compensation provides a constant output power limit over a universal AC input range (90V_AC to 264V_AC). Pulse-by-pulse current limiting ensures safe operation even during short-circuits.      To protect the external power MOSFET from being damaged by supply over-voltage events, the SG6858’s output driver is clamped at 17V. SG6858 controllers can be used to improve the performance and reduce the production cost of power supplies and can replace linear and RCC-mode power adapters. It is available in 8-pin DIP and 6-pin SSOT-26 packages.

• 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 SG6858 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
SG6858DZ	Not recommended for new design	ROHS Compliant		DIP	8	RAIL		Line 1:SG6858DZ Line 2:B3&6&3 (3-Digit Date Code) &Z (Asm. Plant Code)
SG6858TZ	Full Production	Green as of Jul 2011	$0.22	SSOT-6	6	TAPE REEL		Line 1:&E (Space) &E (Space) &Y (Binary Calendar Year Coding) Show more ... Line 2:&O (Plant Code) AAIB&C (Die Run) Line 3:&. (Pin One) &O (Plant Code) &E (Space) &V (Eight Week Binary Datecoding)