NJW4600V [NJRC]

White LED Driver for Backlight; 白光LED驱动器，用于背光


型号：	NJW4600V
厂家：	NEW JAPAN RADIO
描述：	White LED Driver for Backlight 白光LED驱动器，用于背光驱动器
文件：	总2页 (文件大小：185K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

White LED Driver for Backlight

NJW4600

■ GENERAL DESCRIPTION

■ PACKAGE OUTLINE

The NJW4600 is a high efficiency multiple strings white

LED driver for back light.This device is composed with

4channel constant current drivers and step up switching

regulator, and can drive up to 32pcs. LED.

Each constant current driver is able to supply maximum

of 120mA per channel, and the driver interval is

performed by highly precise current control of ±2% typ.

The NJW4600 can control luminance up to 100 : 4 by

PWM signal input, and also features selectable switching

frequency of 800kHz or 1MHz.

NJW4600V

NJW4600KT1

■ FEATURE

▪ Constant Current Driver : 10mA ~ 120mA

When abnormal LED lighting occurs, the FAULT

terminal sends out signals notifying the abnormality to the

control departments, such as CPU.

▪ LED Current Control

▪ Operating Voltage

▪ Switching Frequency

: ±2% ( typ. )

: 6V ~ 35V

: 800kHz / 1MHz

The NJW4600 operates over a wide supply voltage

range from 6V to 35V, and operating temperature is up to

105ºC. This very wide operating temperature range

makes the IC ideal for medium sized LCD backlights,

such as car navigations, note PC, and applications for

amusement device.

▪ LED Open / Short Protection

▪ FAULT Signal Output

▪ Luminance Control with PWM

▪ Internal Soft Start

▪ Under Voltage Lock Out Circuit ( UVLO )

▪ Built in Over Voltage Protection

▪ Built in Over Current Protection

▪ Built in Thermal Shutdown Protection

▪ Package

: NJW4600V

SSOP-32

NJW4600KT1 QFN-24

Ver.2010/09/03ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ ꢀꢀꢀꢀꢀꢀꢀꢀꢀ1

Application

NJW4600

Thermal Shut Down

Over Current Protection

Over Voltage Protection

Power Supply

6V～35V

C_IN

C_OUT

VDD

Regulator

UVLO

TSD

Select Oscillation

Frequency

C_REG

REG

EXT

Low: 800kHz

High:1MHz

Logic

FSEL

OSC

OCP

OVP

R_CS

PWM Input

Luminance control

PWM

FLT

OVP

LED Open/Short

Protection

LED1

LED2

LED3

LED4

C_SS

Feedback

Control

Current

Sink

FAULT

(Error Flag)

Current

Setting

C_NF1

R_NF1

AGND

FBO FBI

ISET

IGND

Constant Current with

Open/Short

Protection

R_NF3

R_FBI

R_ISET

Set up for LED Current

10mA to120mA

Ver.2010/09/03ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ ꢀꢀꢀꢀꢀꢀꢀꢀꢀ2

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