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SG6860TZ Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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SG6860TZ Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 11 page  March 2008 © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com SG6860 • Rev. 1.0.1 SG6860 Low-Cost, Green-Mode PWM Controller for Flyback Converters Features Green-Mode PWM Supports the “Blue Angel” Eco Standard Low Start-up Current: 9µA Low Operating Current: 3mA Leading-Edge Blanking Constant Output Power Limit Universal Input Built-in Synchronized Slope Compensation Current Mode Operation Cycle-by-cycle Current Limiting Under-Voltage Lockout (UVLO) Programmable PWM Frequency with Frequency Hopping VDD Over-Voltage Protection (Latch off) Gate Output Voltage Clamped at 17V Low Cost Few External Components Required Small SOT-26 Package Applications Power Adaptors Open-Frame SMPS Description This highly integrated PWM controller provides several enhancements designed to meet the low standby-power needs of low-power SMPS. To minimize standby power consumption, a 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 strict power conservation requirements. The BiCMOS fabrication process enables reducing the start-up current to 9µA 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 (90VAC to 264VAC). 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 SG6860’s output driver is clamped at 17V. SG6860 controllers can improve the performance and reduce the production cost of power supplies. The SG6860 can replace linear and RCC-mode power adapters. It is available in 8-pin DIP and 6-pin SOT-26 packages. Ordering Information Part Number Operating Temperature Range Package Packing Method SG6860TZ -40°C to +85°C Small SOT-26 Package Tape & Reel SG6860DZ -40°C to +85°C 8-pin Dual in-line Package (DIP) Rail All packages are lead free per JEDEC: J-STD-020B standard. |
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