Datasheet > NX2147

NX2147

更新时间： 2024-11-02 10:30:03

品牌	Logo	应用领域
美高森美 - MICROSEMI		控制器手机
页数	文件大小	规格书
11页	492K
描述
SINGLE CHANNEL MOBILE PWM CONTROLLER WITH DYNAMIC VOLTAGE ADJUSTMENT

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中文翻译

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NX2147 数据手册

NX2147

SINGLE CHANNEL MOBILE PWM CONTROLLER WITH

DYNAMIC VOLTAGE ADJUSTMENT

PRODUCTION DATA SHEET

Pb Free Product

FEATURES

DESCRIPTION

Output voltage can be dynamically changed

Internal Boost Schottky Diode

The NX2147 controller IC is a step down switching con-

troller with ability to dynamically adjust the output volt-

age designed for applications such as Graphic Proces-

sor Core voltage in Notebook PC products. It allows

this by adjusting the reference input of the PWM

comprator as oppose to the traditional method of feed-

back adjustment. This device has three mode of opera-

tions; a) Constant ON Time Synchronous Mode, b) Non

Synchronous PFM mode or c) Ultrasonic PFM mode of

operation. When selected in Non Synchronous mode,

the device automatically disables the synchronous

MOSFET in order to improve efficiency at light load.

This device provides excellent dynamic response and

nearly constant frequency for operation from 4.5V to

24V of input voltage operation. Other features of the

device are; internal logic level signal MOSFETs for out-

put dynamic voltage adjustment, internal boost schotcky

diode, less than 1uA VIN shutdown current, adjustable

current limiting using lower MOSFET Rds-On and feed-

back UVLO followed by latchdown, overvoltage protec-

tion , internal digital soft start and soft stop shutdown

using and internal 20 ohm MOSFET pull down.

Ultrasonic mode operation available

Bus voltage operation from 4.5V to 24V

Less than 1uA VIN shutdown current with Enable

low

Excellent dynamic response with constant on time

control

Selectable between Synchronous CCM mode and

diode emulation mode to improve efficiency at

light load

Programmable switching frequency

Current limit and FB UVLO with latch off

Over voltage protection with latch off

Pb-free and RoHS compliant

APPLICATIONS

Notebook PCs and Desknotes

Tablet PCs/Slates

On board DC to DC such as

12V to 3.3V, 2.5V or 1.8V

Hand-held portable instruments

TYPICAL APPLICATION

PVCC

VCC

1MEG

TON

VIN 7V~22V

2x10uF

G P I O 0 G P IO1 V O U T ( V )

1.17

1.09

0.95

0.9

HDRV

BST

FDS6294

1uH

2.2

ENSW

/MODE

Vout (see table above) /12A

GPIO0

GPIO1

2R5TPE330MC

330uF

FDS6676AS

LDRV

PGND

LOAD

VREF_OC

100k

200k

0.1u

88.7k

10n

VOUT

634k

AGND

Figure1 - Typical application of NX2147

ORDERING INFORMATION

Device

Temperature

Package

Pb-Free

Yes

NX2147CMTR -10^oC to 100^oC 3X3 MLPQ-16L

Rev. 1.6

Rev. 1.8

03/09/09

12/28/09

12 3 4 5 6 7...11

中文翻译

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与NX2147相关器件

型号	品牌	获取价格	描述	数据表
NX2147CMTR	MICROSEMI	获取价格	SINGLE CHANNEL MOBILE PWM CONTROLLER WITH DYNAMIC VOLTAGE ADJUSTMENT
NX2154	MICROSEMI	获取价格	300kHz SYNCHRONOUS PWM CONTROLLER
NX2154A	MICROSEMI	获取价格	300kHz SYNCHRONOUS PWM CONTROLLER
NX2154ACSTR	MICROSEMI	获取价格	300kHz SYNCHRONOUS PWM CONTROLLER
NX2154CSTR	MICROSEMI	获取价格	300kHz SYNCHRONOUS PWM CONTROLLER
NX2155H	MICROSEMI	获取价格	SINGLE POWER SUPPLY SYNCHRONOUS PWM CONTROLLER
NX2155HCUPTR	MICROSEMI	获取价格	SINGLE POWER SUPPLY SYNCHRONOUS PWM CONTROLLER
NX2158	MICROSEMI	获取价格	PWM BOOST CONTROLLER
NX2158CMTR	MICROSEMI	获取价格	PWM BOOST CONTROLLER
NX21SA	DIODES	获取价格	2.5mmx2.0mm CMOS 2-frequency Programmable XO

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