LXMG1930-28-0X Datasheet, PDF (1/8 Pages) Microsemi Corporation – 3-String 5W LED Backlight Boost Driver Module

LXMG1930-28-0x
®
3-String 5W LED Backlight Boost Driver Module
TM
PRODUCTION DATASHEET
DESCRIPTION
KEY FEATURES
LXMG1930-28-0x module is a boost Precision current mirror circuitry
white LED driver for medium size LCD typically provides for 1% percent string to
LED backlight panels. It is designed to string matching at the rated output current.
drive up to three strings of LEDs to a The magnitude of the string current is
maximum of 35V at up to 50mA per string. easily programmed, in 5mA steps through
The module consists of a boost an on board DIP switch.
converter and three programmable 15 to 50 The LXMG1930-28-0x includes over
mA precision current sinks. It is designed voltage protection (OVP), and short and
to work over a wide input voltage range open LED protection. If one string opens,
(4.75V to 28V) providing maximum its current sink will be disabled and the
flexibility. However the converter is a other strings will continue to operate
boost only design requiring the input normally. Likewise if one or several LEDs
supply voltage to not exceed the output in a string short it will continue to function
LED string voltage.
with no adverse affect on the other strings.
The module provides a dimming input: With the use of an external thermistor the
BRITE_A which adjusts the LED display module can provide LED current fold back
brightness by controlling the amplitude of in an over temperature situation.
the LED string current.
The module comes in a small form
The BRITE_A input is very flexible factor PCB and uses an 8 pin input and one
and can be controlled by a PWM signal, of three output connectors.
the application of a DC control voltage or
use of a potentiometer tied as a rheostat.
• Drives Up To 3 String LED Panels
• Strings Can Be Combined For
Higher Current
• Wide Input Voltage 4.75V-28V
• String Voltage Up To 35V
• LED String Current Programmable
in 5mA Steps from 15mA to 50mA
For Matching Various Panel
Requirements
• 1% Typical String-to-String
Current Matching
• Analog Dimming Provides For a
10:1 Ratio
• Supports Multiple Methods Of
Dimming Such As DC Voltage,
PWM Signal and Potentiometer
• Output Over Voltage Protection
• LED Over Temperature Protection
Input
APPLICATIONS
• Medium Size White LED Backlight
LCD Displays
• Portable Instrumentation Displays
• Medical Instrument Displays
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Patents Pending
PRODUCT HIGHLIGHT
Wide Input
Voltage Range
4.75V to 28V
LXMG1930-28-01
CN4
CN1
X
DIMMING INPUT:
SW1
Analog – Current Amplitude
SW2
Dimming
SW3
SW4
Drives Up To Three
String LED Panels. LED
String Voltage up to 35V
Precision
String-to-String Current
Matching
Part Number
LXMG1930-28-01
LXMG1930-28-03
LXMG1930-28-04
DC Voltage
Source
Potentiometer
PWM Signal
Supports Multi-Method
Analog Dimming
Externally
Programmable LED
String Current From
15mA to 50mA in
5mA Steps
ORDER INFORMATION
Input Connector
Output Connector
Molex 53261-0871 or equivalent
Molex 53261-0471 or equivalent
Hirose DF19G-8P-1H or equivalent
Kyocera 04-6298-006-000-883+ or equivalent
Copyright © 2009
Rev. 1.1, 2009-11-25
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 800-877-6458, 714-898-8121, Fax: [phone]
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