APW7062BKC-TRG Ver la hoja de datos (PDF) - Anpec Electronics

Número de pieza

componentes Descripción

Fabricante

APW7062BKC-TRG

Synchronous Buck PWM Controller

Anpec Electronics 

APW7062B

Function Pin Description (Cont.)

COMP (Pin4)

This pin is the output of the error amplifier. Add an exter-

nal resistor and capacitor network to provide the loop com-

pensation for the PWM converter (see Application

Information).

BOOT (Pin 10)

This pin provides the supply voltage to the high side

MOSFET driver. For driving logic level N-channel MOSEFT,

a bootstrap circuit can be used to create a suitable driver’s

supply.

FB (Pin5)

FB pin is the inverter input of the error amplifier and it

receives the feedback voltage from an external resis-tive

divider across the output (VOUT). The output voltage is

determined by:

VOUT

=

0.8V

×

1+

ROUT

RGND



Where ROUT is the resistor connected from the VOUT to the

FB and RGND is the resistor connected from the FB to the

GND.

If the FB voltage is under 50% VREF because of the short

circuit or other influence , it will cause the under-voltage

protection, and the device is shutdowned. Remove the

error condition and restart the VCC voltage or pull the EN

from low to high once, the device can be enabled again.

EN (Pin6)

Pull the pin higher than 2V to enable the device, and pull

the pin lower than 0.8V to shutdown the device. In

shutdown, the SS is discharged and the UGATE and

LGATE pins are held low. The EN pin is the open-collector,

and it will not be floating.

PGND (Pin11)

Power ground for the gate diver. Connect the lower

MOSFET source to this pin.

LGATE (Pin 12)

Connect the pin to the external MOSFET, and provides

the gate drive signal for the lower MOSFET.

PVCC (Pin13)

This pin provides a supply voltage for the lower gate

drive, connect it to the VCC pin in common use.

VCC (Pin14)

This pin provides a supply voltage for the device. When

the VCC is above the rising threshold 10.4V, the device is

turned on; conversely, when the VCC is below the falling

threshold, the device is turned off.

GND (Pin7)

Signal ground for the IC.

PHASE (Pin8)

This pin is connected to the source of the high-side

MOSFET and is used to monitor the voltage drop across

the high-side MOSFET for over-current protection.

UGATE (Pin9)

Connect the pin to external MOSFET, and provides the

gate drive for the upper MOSFET.

Copyright © ANPEC Electronics Corp.

10

Rev. A.4 - Oct., 2008

www.anpec.com.tw

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