NX2422 Ver la hoja de datos (PDF) - Microsemi Corporation

Número de pieza

componentes Descripción

Fabricante

NX2422

TWO PHASE SYNCHRONOUS PWM CONTROLLER WITH INTEGRATED FET DRIVER, DIFFERENTIAL CURRENT SENSE

Microsemi Corporation 

SYMBOL

BST2

HDRV2

SW2

LDRV2

PVCC

LDRV1

SW1

PGND

VCCDRV

NX2422

PIN DESCRIPTION

Bootstrap supply for Channel 2.

High side gate driver for Channel 2.

Switch node for Channel2.

Low side gate driver for Channel 2.

This pin provide the supply voltage for the lower MOSFET drivers. This pin provide

the supply voltage for the lower MOSFET drivers. A high frequency ceramic 1uF

must be placed close to this pin and tied to PGND to provide peak current

needed for low side MOSFETs.

Low side gate driver for Channel 1.

Switch node for Channel 1.

This is the ground connection for the power stage of the controller.

The output of the 5V regulator controller that drives a low current low cost exter-

nal BIPOLAR transistor or an external MOSFET to regulate the voltage at Vcc pin

derived from BUS voltage. A resistor with value from 1k to 10k is used to connect

VCCDRV and VBUS. Pulling down VCCDRV is used to disable chip in NX2422

application .

Rev.2.1

6

12/01/08

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