LX1990ILM Microsemi Analog Mixed Signal Group, LX1990ILM Datasheet

LX1990ILM

Manufacturer Part Number

LX1990ILM

Description

IC LED DRIVER LINEAR 6-MLP

Manufacturer

Microsemi Analog Mixed Signal Group

Type

Linear (Non-Switching)r

Datasheet

1.LX1990ILM.pdf (11 pages)

Specifications of LX1990ILM

Constant Current

Yes

Topology

PWM

Number Of Outputs

Internal Driver

Yes

Type - Primary

Backlight

Type - Secondary

White LED

Voltage - Supply

2.75 V ~ 5.5 V

Voltage - Output

0.1 V ~ 10 V

Mounting Type

Surface Mount

Package / Case

6-MLP

Operating Temperature

-40°C ~ 85°C

Current - Output / Channel

30mA

Internal Switch(s)

Yes

For Use With

LX1990-03EVAL - BOARD EVAL LED DRIVER 2CHANNELLX1990-02 EVAL - EVAL BOARD FOR LED DRIVER

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Frequency

Efficiency

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LX1990ILM

Manufacturer:

Microsemi Analog Mixed Signal

Quantity:

28 625

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LX1990ILM-TR

Manufacturer:

Quantity:

120

Current page: 1 of 11
Download datasheet (208Kb)

Rev. 1.0d, 2005-03-14

sink optimized for driving light emitting

diodes. This low cost bipolar IC enables

precise current regulation in LED

display

requires far fewer parts than discrete

solutions. The LX1990 is supplied in a

micro-miniature 6 lead MLP package

featuring a 3 x 3 mm footprint, a profile

of less than 1mm, and much improved

thermal performance. Its two output sink

currents are accurately matched and

require only one resistor to program.

Program current is only 1% of the

output currents, and quiescent current is

low, providing a very high efficiency

driver for battery-powered displays.

mirror architecture that transfers a

reference current produced at the I

pin to each of two open-collector current

sinking outputs.

multiply this reference current by 100 to

sink independently regulated currents up

to 30 mA.

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

The LX1990 is a dual output current

The LX1990 is based on a current-

lighting

The output stages

applications,

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

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

D E S C R I P T I O N

-40 to 85

yet

SET

O N/OFF

(°C)

to average current through them; they can

easily produce a brightness range of 500:1.

However, color of emitted light is shifted by

current amplitude. Color shift at low light

levels can be reduced by driving the LED’s

with a constant peak current while dimming

with duty cycle control.

resistor with a PWM signal.

brightness range can be achieved by

choosing 270 Hz as the PWM frequency (to

avoid optical beating with 50/60 Hz room

lights)

milliseconds to 7.4 microseconds.

via the Enable pin.

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.

SET

Light output from LED’s is proportional

This is achieved by driving the I

The LX1990 features a shutdown mode

P R O D U C T H I G H L I G H T

PACKAGE ORDER INFO

and

Integrated Products

Microsemi

ENA

ISET

pulse

RoHS Compliant / Pb-free Transition DC: 0452

LX1990

G ND

VDD

Plastic MLP

6-Pin

width

In this mode the

Dual Programmable LED Current Sink

O U T B

O UT A

LX1990ILM

from

LO AD

A 500:1

3.7

SET

• Programmable Sink Current

• Replaces Discrete Transistor

• 300mV Maximum Current Sink

• 2.7 to 5.5V Power Supply Input

• I

• Enable Input With <1µA Sleep

• Amplitude and PWM Dimming

• Current rise and fall time may

• Cell Phone Display Illumination

• PDA White LED Display

• Automotive Display Illumination

• Digital Still Camera

• Camcorders

• Consumer Electronics Front

0.1 to 30mA x 2 Channels

Circuitry With A Single Package

Dropout Voltage at 20mA

0.1 to 10V

Current

be controlled to reduce EMI

Lighting

Panels

OUT

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

K E Y F E A T U R E S

Compliance Voltage from

LX1990

Page 1

Related parts for LX1990ILM

LX1990ILM Summary of contents

Page 1

... IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com 5V - Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1990ILM-TR) Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® ...

Page 2

Supply Voltage (V ) ....................................................................................... 6V DD ENA Voltage..................................................................................................... 6V I Maximum Current.............................................................. Internally Limited SET I ...

Page 3

Parameter Supply Voltage ( ENA (ENABLE) Input ...

Page 4

Page 5

UNCTIONAL ESCRIPTION The LX1990 is designed to drive LED’s used in display illumination and signaling applications such as cellular telephones and PDA’s. With a 5V supply, the two independently regulated constant current outputs can drive 2 white ...

Page 6

TM VDD = 5V, ENA = 5V Vs. Temperature @ I OUT 20.8 IOUTA @ 5V 20.6 20.4 20.2 20 IOUT A @ 2.7V 1 9.8 1 9.6 -45 - Tem p (° ...

Page 7

TM Figure 2 – Auto Dashboard or Instrument Front Panel LED Array +5V VDD ENA ON/OFF ISET GND 1.25V Figure 3 – Color LCD Display & Keypad Illumination Figure 4 – Variable Current ...

Page 8

TM I VDD OUTB PWM ENA I OUTA ISET GND R SET Figure 5 – PWM on Enabled (Lowest IQ OFF VDD I O UTB ENA I O UTA ISET GND R SET DIV ...

Page 9

TM 3.3V ON/OFF PW M 10K 100K Figure 11 – Using the LX1990 With High Voltage Supplies Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® A ...

Page 10

Page 11

TM PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not ...

Related keywords

lx1995
lx1990ilm
lx1992clm
lx1991ilq
LX1990ILM datasheet
LX1990ILM data sheet
LX1990ILM pdf datasheet
LX1990ILM component
LX1990ILM part
LX1990ILM distributor
LX1990ILM RoHS
LX1990ILM datasheet download