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SG6932 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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SG6932 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 20 page  May 2008 © 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com SG6932 • Rev. 1.1.3 SG6932 PFC / Forward PWM Controller Features Interleaved PFC/PWM Switching Low Operating Current Innovative Switching-Charge Multiplier-divider Multi-vector Control for Improved PFC Output Transient Response Average Current Mode for Input-current Shaping PFC Over-voltage and Under-voltage Protections PFC and PWM Feedback Open-loop Protection Cycle-by-cycle Current Limiting for PFC/PWM Slope Compensation for PWM Selectable PWM Maximum Duty Cycle: 50%, 65% Brownout Protection Power-on Sequence Control and Soft-start Applications Switch-mode Power Supplies with Active PFC Servo-system Power Supplies PC-ATX Power Supplies Description The highly integrated SG6932 is designed for power supplies with boost PFC and forward PWM. It requires very few external components to achieve versatile protections and compensation. It is available in 16-pin DIP and SOP packages. The proprietary interleave-switching feature synchronizes the PFC and PWM stages and reduces switching noise. At light load, the switching frequency is continuously decreased to reduce power consumption. For PFC stage, the proprietary multi-vector control scheme provides a fast transient response in a low- bandwidth PFC loop; in which the overshoot and undershoot of the PFC voltage are clamped. If the feedback loop is broken, SG6932 shuts off to prevent extra-high voltage on output. For the forward PWM stage, the synchronized slope compensation ensures the stability of the current loop under continuous-conduction-mode (CCM) operation. Hiccup operation during output overloading is guaranteed. The soft-start and programmable maximum duty cycle ensure safe operation. SG6932 provides complete protection functions, such as brownout protection and RI open/short latch off. Ordering Information Part Number Operating Temperature Range Package Eco Status Packing Method SG6932DZ -40°C to +85°C 16-pin Dual In-Line Package (DIP) RoHS Tube SG6932SZ -40°C to +85°C 16-pin Small Outline Package (SOP) RoHS Tape & Reel For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. |
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