SG6859A

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 9uA, and the operating current to 3mA. 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, the SG6859A’s output driver is clamped at 17V. SG6859A controllers can be used to improve the performance and reduce the production cost of power supplies. The best choice for replacing linear and RCC-mode power adapters, The SG6859A is available in 8-pin DIP and 6-pin SOT-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 SG6859A is available. **

Product	Product Status	Eco Status	*Pricing	Package Type	Leads	Packing Method	Package Drawing	**Package Marking Convention	Qualification Support	RoHS IPC1752	RoHS/REACH/ JIG Certificate of Compliance
SG6859ADZ	Full Production	ROHS Compliant	$0.32	MDIP 8L	8	RAIL		Line 1:SG6859ADZ Line 2:F3&6&3 (3-Digit Date Code) &Z (Asm. Plant Code)	ESD (HBM) :  3500  V RTHETA (JA) :  273  °C/W Moisture Sensitivity Level (MSL) :  NA   Show more ... Max Reflow Temp :  999
SG6859ATY	Last time buys being accepted	Green as of Dec 2009	$0.34	SSOT 6L	6	TAPE REEL		Line 1:&E (Space) &E (Space) &Y (Binary Calendar Year Coding) Show more ... Line 2:&O (Plant Code) AAJF&C (Die Run) Line 3:&. (Pin One) &O (Plant Code) &E (Space) &V (Eight Week Binary Datecoding)	ESD (CDM) :  1500  V ESD (HBM) :  3500  V RTHETA (JA) :  273  °C/W Show more ... Moisture Sensitivity Level (MSL) :  1   Max Reflow Temp :  260
SG6859ATZ	Full Production	Green as of Jul 2011	$0.22	SSOT 6L	6	TAPE REEL		Line 1:&E (Space) &E (Space) &Y (Binary Calendar Year Coding) Show more ... Line 2:&O (Plant Code) AAJF&C (Die Run) Line 3:&. (Pin One) &O (Plant Code) &E (Space) &V (Eight Week Binary Datecoding)	ESD (CDM) :  1500  V ESD (HBM) :  3500  V RTHETA (JA) :  273  °C/W Show more ... Moisture Sensitivity Level (MSL) :  1   Max Reflow Temp :  260