Datasheet > LX1990_05

LX1990_05

更新时间： 2024-11-21 11:40:51

品牌	Logo	应用领域
美高森美 - MICROSEMI		/
页数	文件大小	规格书
11页	209K
描述
Dual Programmable LED Current Sink

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中文翻译

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数据手册

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LX1990_05 数据手册

LX1990

Dual Programmable LED Current Sink

DESCRIPTION

KEY FEATURES

The LX1990 is a dual output current

Light output from LED’s is proportional

• Programmable Sink Current

0.1 to 30mA x 2 Channels

• Replaces Discrete Transistor

Circuitry With A Single Package

• 300mV Maximum Current Sink

Dropout Voltage at 20mA

• 2.7 to 5.5V Power Supply Input

• I_OUTCompliance Voltage from

0.1 to 10V_DC

• Enable Input With <1µA Sleep

Current

• Amplitude and PWM Dimming

• Current rise and fall time may

be controlled to reduce EMI

sink optimized for driving light emitting to average current through them; they can

diodes. This low cost bipolar IC enables easily produce a brightness range of 500:1.

precise current regulation in LED However, color of emitted light is shifted by

display lighting applications, yet current amplitude. Color shift at low light

requires far fewer parts than discrete levels can be reduced by driving the LED’s

solutions. The LX1990 is supplied in a with a constant peak current while dimming

micro-miniature 6 lead MLP package with duty cycle control.

featuring a 3 x 3 mm footprint, a profile

This is achieved by driving the I_SET

of less than 1mm, and much improved resistor with a PWM signal. A 500:1

thermal performance. Its two output sink brightness range can be achieved by

currents are accurately matched and choosing 270 Hz as the PWM frequency (to

require only one resistor to program. avoid optical beating with 50/60 Hz room

Program current is only 1% of the lights) and pulse width from 3.7

output currents, and quiescent current is milliseconds to 7.4 microseconds.

low, providing a very high efficiency

driver for battery-powered displays.

The LX1990 is based on a current-

The LX1990 features a shutdown mode

via the Enable pin. In this mode the

LX1990 consumes less than 1µA and holds

the two open collector output stages off.

This pin may also be used to pulse width

modulate output current. See applications

section for dimming details.

A P P L I C A T I O N S

mirror architecture that transfers

• Cell Phone Display Illumination

• PDA White LED Display

Lighting

• Automotive Display Illumination

• Digital Still Camera

• Camcorders

reference current produced at the I_SET

pin to each of two open-collector current

sinking outputs. The output stages

multiply this reference current by 100 to

sink independently regulated currents up

to 30 mA.

• Consumer Electronics Front

Panels

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

PRODUCT HIGHLIGHT

V_LOAD

VDD

ENA

I_OUTB

LX1990

ISET I_OUTA

ON/OFF

GND

R_SET

PACKAGE ORDER INFO

Plastic MLP

6-Pin

T_A(°C)

RoHS Compliant / Pb-free Transition DC: 0452

-40 to 85

LX1990ILM

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1990ILM-TR)

Rev. 1.0d, 2005-03-14

Microsemi

Integrated Products

Page 1

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

12 3 4 5 6 7...11

中文翻译

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与LX1990_05相关器件

型号	品牌	获取价格	描述	数据表
LX1990-02EVAL	ETC	获取价格	LED Driver
LX1990EVAL	ETC	获取价格	LED Driver
LX1990ILM	MICROSEMI	获取价格	Dual Programmable LED Current Sink
LX1990ILM-T	MICROSEMI	获取价格	LED Driver, 2-Segment, BIPolar, PDSO6, MICRO, PLASTIC, MLP-6
LX1990ILM-TR	MICROSEMI	获取价格	Dual Programmable LED Current Sink
LX1991	MICROSEMI	获取价格	Six Output Programmable LED Current Sink
LX1991-01EVALKIT	ETC	获取价格	LED Driver
LX1991-03EVALKIT	ETC	获取价格	LED Driver
LX1991ILQ	MICROSEMI	获取价格	Six Output Programmable LED Current Sink
LX1991ILQ-TR	MICROSEMI	获取价格	LED Driver, 6-Segment, PQCC16, 4 X 4 MM, ROHS COMPLIANT, EXPOSED PAD, PLASTIC, MLPQ-16

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