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F72815SG Datasheet(PDF) 5 Page - Feature Integration Technology Inc. |
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F72815SG Datasheet(HTML) 5 Page - Feature Integration Technology Inc. |
5 / 18 page F72815 Aug, 2007 V0.14 -2- F72815 3. Pin Configuration 4. Pin Description Pin No Pin Name Description 1 BOOT Bootstrap supply pin for the upper gate driver. Connect the bootstrap capacitor between BOOT pin and the PHASE pin. The bootstrap capacitor provides the charge to turn on the upper MOSFET. 2 UGATE Higher gate drive output. Connect this pin to gate of the high side MOSFET 3 VREF Reference voltage input. The input range is 0.6V~1.8V. 4 LGATE Lower gate drive output. Connect this pin to gate of the low side MOSFET 5 VCC IC supply voltage. This voltage is monitored for power-on-reset purpose. 6 FB Inverting input of the error amplifier used to compensate the feedback loop of the PWM controller. 7 OCSET/SD This is multi-function pin. Connecting a resistor ROCSET from this pin to PHASE, and an internal 40uA current source from VCC. OCSET voltage can sense loading status when low side MOSFET turn on. When OCSET voltage is under 0.15V, shut down (SD) function will be enabled. 8 PHASE Connect this pin to the source of the upper MOSFET and the drain of the lower MOSFET. GND 9 |
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