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FSCQ0965RTYDTU Datasheet(PDF) 3 Page - Fairchild Semiconductor |
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FSCQ0965RTYDTU Datasheet(HTML) 3 Page - Fairchild Semiconductor |
3 / 45 page 3 www.fairchildsemi.com FSCQ-Series Rev. 1.1.2 Internal Block Diagram Figure 2. Functional Block Diagram of FSCQ-Series 9V/15V 3 1 2 4 Auxiliary Vref Main Bias S Q Q R OSC VCC Vref Vref Idelay IFB VSD TSD Vovp Sync Vocp S Q Q R R 2.5R VCC good VCC good (VCC = 9V) Vcc Drain VFB GND AOCP Gate Driver LEB 600ns PWM Soft Start Internal Bias VBurst IB Vref IBFB Burst Mode Controller Normal Operation Normal Operation Burst Switching 5 Sync Quasi-Resonant (QR) Switching Controller + - + - S Q Q R Power Off Reset (VCC = 6V) 4.6V/2.6V: Normal QR 3.0V/1.8V: Extended QR fs Threshold |
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