SG5842JA

The highly integrated SG5842A/JA 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. To avoid acoustic-noise problems, the minimum PWM frequency set above 22KHz. This green-mode function enables the power supply to meet international power conservation requirements. To further reduce power consumption, SG5842A/JA is manufactured using the BiCMOS process. This allows a low startup current, around 14µA, and an operating current of only 4mA. As a result, a large startup resistance can be used. The SG5842A/JA built-in synchronized slope compensation achieves stable peak-current-mode control. SG5842JA integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. SG5842A/JA 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. As long as V_DD exceeds about 24V, the internal OVP circuit is triggered. An external NTC thermistor can be applied for over-temperature protection. SG5842A/JA 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 SG5842JA 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
SG5842JASY	Last time buys being accepted	Green as of Dec 2008	N/A	SO-8	8	TAPE REEL		Line 1:$Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2:5842JA Line 3:SYC
SG5842JASZ	Full Production	ROHS Compliant	$0.43	SO-8	8	TAPE REEL		Line 1:SG5842JASZ Line 2:C3&6&3 (3-Digit Date Code) &Z (Asm. Plant Code)