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APW7067NME-TUL Datasheet(PDF) 7 Page - Anpec Electronics Coropration |
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APW7067NME-TUL Datasheet(HTML) 7 Page - Anpec Electronics Coropration |
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7 / 27 page  Copyright © ANPEC Electronics Corp. Rev. A.1 - Jun., 2006 APW7067N www.anpec.com.tw 7 Function Pin Descriptions VCC12 Power supply input pin. Connect a nominal 12V power supply to this pin. The power-on reset function monitors the input voltage at this pin. It is recommended that a decoupling capacitor (1 to 10 µF) be connected to GND for noise decoupling. BOOT This pin provides the bootstrap voltage to the upper gate driver for driving the N-channel MOSFET. An external capacitor from PHASE to BOOT, an internal diode, and the power supply valtage VCC12, generates the bootstrap voltage for the upper gate diver (UGATE). PHASE This pin is the return path for the upper gate driver. Connect this pin to the upper MOSFET source, and connect a capacitor to BOOT for the bootstrap voltage. This pin is also used to monitor the voltage drop across the lower MOSFET for over-current protection. GND This pin is the signal ground pin. Connect the GND pin to a good ground plane. PGND This pin is the power ground pin for the lower gate driver. It should be tied to GND pin on the board. COMP This pin is the output of PWM error amplifier. It is used to set the compensation components. FB This pin is the inverting input of the PWM error amplifier. It is used to set the output voltage and the compensation components. This pin is also monitored for under- voltage protection, when the FB voltage is under 50% of reference voltage (0.4V), both outputs will be shut - downed immediately. UGATE This pin is the gate driver for the upper MOSFET of PWM output. LGATE This pin is the gate driver for the lower MOSFET of PWM output. DRIVE This pin drives the gate of an external N-channel MOSFET for linear regulator. It is also used to set the compensation for some specific applications, for example, with low values of output capacitance and ESR. FBL This pin is the inverting input of the linear regulator error amplifier. It is used to set the output voltage. This pin is also monitored for under-voltage protection, when the FBL voltage is under 50% of reference voltage (0.4V), both outputs will be shutdown immediately. FS_DIS This pin be allowed to adjust the switching frequency. Connect a resistor from FS_DIS pin to the ground to increase the switching frequency. This pin also provides shutdown function, use an open drain logic signal to pull this pin low to disable both outputs, leave open to enable both outputs. |
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