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FAN6961SY Datasheet(PDF) 3 Page - Fairchild Semiconductor |
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FAN6961SY Datasheet(HTML) 3 Page - Fairchild Semiconductor |
3 / 13 page © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6961 • Rev. 1.0.2 3 Marking Information Figure 3. Marking Information Pin Configuration 14 3 2 8765 VCC GATE MOT ZCD INV COMP CS GND Figure 4. DIP and SOP Pin Configuration (Top View) Pin Definitions Pin # Name Description 1 INV Inverting input of the error amplifier . INV is connected to the converter output via a resistive divider. This pin is also used for over-voltage clamping and open-loop feedback protection. 2 COMP The output of the error amplifier . To create a precise clamping protection, a compensation network between this pin and GND is suggested. 3 MOT Maximum On Time A resistor from MOT to GND is used to determine the maximum on-time of the external power MOSFET. The maximum output power of the converter is a function of the maximum on time. 4 CS Current Sense . Input to the over-current protection comparator. When the sensed voltage across the sense resistor reaches the internal threshold (0.8V), the switch is turned off to activate cycle-by-cycle current limiting. 5 ZCD Zero Current Detection . This pin is connected to an auxiliary winding via a resistor to detect the zero crossing of the switch current. When the zero crossing is detected, a new switching cycle is started. If it is connected to GND, the device is disabled. 6 GND Ground . The power ground and signal ground. Placing a 0.1µF decoupling capacitor between VCC and GND is recommended. 7 GATE Driver output . Totem-pole driver output to drive the external power MOSFET. The clamped gate output voltage is 16.5V. 8 VCC Power supply . Driver and control circuit supply voltage. F - Fairchild Logo Z- Plant Code X- Year Code Y- Week Code TT: Die Run Code T: Package type (S=SOP, D=DIP) P: Z: Pb Free Y: Green Compound M: Manufacture Flow Code FAN6961 TPM |
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