NX2423

更新时间： 2024-11-02 06:00:35

品牌	Logo	应用领域
美高森美 - MICROSEMI		驱动器稳压器控制器
页数	文件大小	规格书
20页	654K
描述
TWO PHASE SYNCHRONOUS PWM CONTROLLER WITH INTEGRATED FET DRIVER, DIFFERENTIAL CURRENT SENSE & 5V BIAS REGULATOR

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中文翻译

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NX2423 数据手册

NX2423

TWO PHASE SYNCHRONOUS PWM CONTROLLER WITH

INTEGRATED FET DRIVER, DIFFERENTIAL CURRENT SENSE

& 5V BIAS REGULATOR

Pb Free Product

PRELIMINARY DATA SHEET

FEATURES

DESCRIPTION

n Differential inductor DCR sensing eliminates the

problem with layout parasitic

n 5V bias regulator available

The NX2423 is a two-phase PWM controller with inte-

grated FET driver designed for low voltage high current

application. The two phase synchronous buck converter

offers ripple cancelation for both input and output. The

NX2423 uses differential remote sensing using either cur-

rent sense resistor or inductor DCR sensing to achieve

accurate current matching between the two channels.

Differential sensing eliminates the error caused by PCB

board trace resistance that otherwise presents when us-

ing a single ended voltage sensing.

n Low Impedance On-board Drivers

n Hiccup current limit and IOUT indication

n Power Good for power sequencing

n EN2_B pin allows the slave channel on and off while

the master channel is working

n Programmable frequency

n Prebias start up

n OVP without negative spike at output

n Selectable between internal and external reference

n Internal Schottky diode from PVCC to BST

In addition the NX2423 offers high drive current capabil-

ity especially for keeping the synchronous MOSFET off

during SW node transition, can provide regulated 5V to

IC biasing and drivers via 5V bias regulator, allows the

slave channel on and off via EN2_B pin while the main

channel is working. Other features: PGOOD output, pro-

grammable switching frequency and hiccup current lim-

iting circuitry.

n Pb-free and RoHS compliant

APPLICATIONS

Graphic card High Current Vcore Supply

n High Current on board DC to DC converter

applications

TYPICAL APPLICATION

12V BUS

C11

C12

R10

C10

2N3904

VCCDRV

BST1

2N3904

R13

HDRV1

SW1

R14

VOUT

C13

C14

PVCC

R29

C15

C31

LDRV1

R11

C29

C30

5VCC

R28

CS+1

CS-1

REFIN

AGND

R15

R18

CSCOMP

C17 C18

C28

BST2

HDRV2

SW2

R16

R17

C19

IOUT/IMAX

C27

C26

C20

C21

VCOMP

R27

C22

LDRV2

R19

C25

R26

R20

CS+2

CS-2

EN2_B

VOUT

R24

C24

Ref for external circuitry

INREFOUT/POK

PGND(PAD)

Figure1 - Typical application of NX2423

ORDERING INFORMATION

Device

NX2423CMTR

Temperature

0 to 70^oC

Package

MLPQ 4x4 - 24L

Frequency

Pb-Free

Yes

50kHz to 1MHz

Rev. 2.1

12/01/08

12 3 4 5 6 7...20

中文翻译

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与NX2423相关器件

型号	品牌	获取价格	描述	数据表
NX2423CMTR	MICROSEMI	获取价格	TWO PHASE SYNCHRONOUS PWM CONTROLLER WITH INTEGRATED FET DRIVER, DIFFERENTIAL CURRENT SENS
NX24SA	DIODES	获取价格	2.5mmx2.0mm HCSL 2-frequency Programmable XO
NX24SB	DIODES	获取价格	2.5mmx2.0mm HCSL 4-frequency Programmable XO
NX251	PERICOM	获取价格	2.5V/3.3V CMOS XO
NX251	DIODES	获取价格	2.5mmx2.0mm CMOS Programmable XO
NX2511A	PERICOM	获取价格	2.5V/3.3V CMOS XO
NX2511B	PERICOM	获取价格	2.5V/3.3V CMOS XO
NX2511C	PERICOM	获取价格	2.5V/3.3V CMOS XO
NX2511D	PERICOM	获取价格	2.5V/3.3V CMOS XO
NX2511E	PERICOM	获取价格	2.5V/3.3V CMOS XO

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