Product Summary

The SG6841DZ is a high-integrated green-mode PWM controller. It provides several features to enhance the performance of low power flyback converters. To minimize standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease the switching frequency under light-load conditions. The SG6841DZ also provides many protection functions. Pulse by pulse current limit ensures a constant output current under short circuit. If a short circuit failure or over load happens, the SG6841DZ will shut off after a continuous high voltage detection on FB pin. The applications of it are General-purpose switching mode power supplies and flyback power converters, power adapter, open-frame SMPS, battery charger adapter.

Parametrics

SG6841DZ absolute maximum ratings: (1)DC supply voltage:30V; (2)Zener clamp:32V; (3)Zener current:10mA; (4)Gate output current:500mA; (5)Input voltage to FB pin:-0.3V to 7V; (6)Input voltage to SENSE pin:-0.3V to 7V; (7)Input voltage to RT pin:-0.3V to 7V; (8)Input voltage to Ri pin:-0.3V to 7V; (9)Power dissipation:1W; (10)Thermal resistance junction-air: DIP:82.5℃/W, SOP:141℃/W; (11)Operating junction temperature:150℃; (12)Operating ambient temperature:-30℃ to 85℃; (13)Storage temperature range:-55℃ to +150℃ ; (14)ESD capability, HBM model:3.0kV; (15)ESD capability, machine model:250V.

Features

SG6841DZ features: (1)Green-mode PWM to support “Blue Angel” Norm ; (2)Low start up current 30uA ; (3)Low operation current 3mA ; (4)Leading-edge blanking ; (5)Built-in synchronized slope compensation Constant output power limit for universal AC input ; (6)Current mode operation ; (7)Cycle-by-cycle current limiting ; (8)Under voltage lockout (UVLO) ; (9)Programmable PWM frequency ; (10)GATE output maximum voltage clamped at 18V ; (11)Totem pole output includes soft driving for better EMI ; (12)Build-in limited-power-control to meet safety requirement ; (13)Programmable over-temperature protection ; (14)Few external components, low cost solution.

Diagrams

SG6841DZ pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
SG6841DZ
SG6841DZ

Fairchild Semiconductor

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Data Sheet

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Data Sheet

0-2550: $0.27
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