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FAN7530 데이터시트(PDF) 21 Page - Fairchild Semiconductor |
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FAN7530 데이터시트(HTML) 21 Page - Fairchild Semiconductor |
21 / 37 page © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN9611 / FAN9612 • Rev. 1.1.3 21 Gate Drive The gate drive pattern should be wide enough to handle 1A peak current. Keep the controller as close to the MOSFETs as possible. This minimizes the length and the loop area (series inductance) of the high-current gate drive traces. The gate drive pattern should be as short as possible to minimize interference. Current Sensing Current sensing should be as short as possible. To minimize switching noise, current sensing should not make a loop. Input Voltage Sensing (VIN) Since the impedance of voltage divider is large and FAN9611/12 detects the peak of the line voltage, the VIN pin can be sensitive to the switching noise. The trace connected to this pin should not cross traces with high di/dt to minimize the interference. The noise bypass capacitor for VIN should be connected as close to the pin as possible. |
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