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LXMG1621-02

P1-P3P4-P6P7-P9P10-P10
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 2007
Rev. 1.2, 2010-08-20
WWW.Microsemi .COM
RangeMAX
™
LXMG1621-xx
DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE
P
RODUCTION
D
ATA
S
HEET
TM
®
DESCRIPTION
The LXMG1621 Direct Drive™ CCFL
(Cold Cathode Fluorescent Lamp)
Inverter Modules are specifically
designed for driving two lamp LCD
backlight displays.
Similar to the LXMG1620, the
LXMG1621 excels in applications where
critical parameters include very wide
range dimmability, high efficiency, and
reliable fail-safe design in a small form
factor. These 12 volt modules are
specifically designed with desktop and
industrial applications in mind.
Unlike the LXMG1620 or any
traditional dimming CCFL inverters, the
LXMG1621 provides the designer a
vastly superior display brightness range.
100:1+ brightness range is achievable
with a standard LCD display (see Product
Highlight). Our wide range dimming
provides exceptional display readability at
less than 1% of full brightness, allowing
both power savings and low ambient light
operating capability(i.e. “night readable”).
Digital dimming provides flicker-free
brightness control in any wide-range
dimming application.
Incorporation of a video synch-
ronization feature allows wide ratio
dimming without the display disturbances
and interference seen with competitive
products.
The modules are equipped with a
dimming input that permits brightness
control from an external potentiometer or
DC voltage source. The resultant “burst
drive” that energizes the lamp was
designed specifically to ensure that no
premature lamp degradation occurs (see
the “How RangeMAX works” section).
The module design is based on a new
Direct Drive topology, which provides a
number of cost and performance
advantages.
Microsemi’s multiple lamp inverters
include a built in connector array for the
most common LCD lamp configurations.
Other benefits of this new topology are
fixed-frequency operation and secondary-
side strike-voltage regulation.
The LXMG1621 is fully customizable
(electronically and mechanically) to
specific customer requirements.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected By U.S. Patents: 5,923,129; 5,930,121; Patents Pending
KEY FEATURES
RangeMAX Wide Range Dimming
8V to 16V Input Voltage Range
Small Form Factor
Easy To Use Brightness Control
MicroAmp SLEEP Mode
Output Short-Circuit Protection
And Automatic Strike-Voltage
Regulation
Fixed Frequency Operation
Universal Connector
Configuration
RoHS Compliant
UL 60950 E17590
APPLICATIONS
Hi-Brite Displays
Desktop Displays
Low Ambient Light Conditions
(i.e. Aircraft Cabins, Automobile)
Industrial Applications
BENEFITS
High Efficiency Reduces Heating
Problems
Smooth, Flicker Free 0-100% Full-
Range Brightness Control Gives
Your Product A High Quality
Image
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For Long Life And High
Reliability
Power Efficient, “Low Brightness”
Capability Allows For Advanced
Power Management
PRODUCT HIGHLIGHT
UNIVERSAL DIMMING INPUT
V
DC
OR POTENTIOMETER
1
2
3
W
1
2
3
W
BRITE
DC Voltage
Source
Potentiometer
MODULE ORDER INFO
PART NUMBER
L
AMP
CURRENT
L
AMP RUN VOLTAGE (RMS)
LXMG1621-01 7mA 500-750
LXMG1621-02 6mA 350-550
LXMG1621-04 6mA 470-640
L
L
X
X
M
M
G
G
1
1
6
6
2
2
1
1
-
-
X
X
X
X
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright © 2007
Rev. 1.2, 2010-08-20
WWW.Microsemi .COM
RangeMAX
™
LXMG1621-xx
DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE
P
RODUCTION
D
ATA
S
HEET
TM
®
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Input Supply Voltage (V
IN
) ................................................................................................................................ -0.3V to 18V
Output Voltage, no load ....................................................................................................... Internally Limited to 1800V
RMS
Output Current ........................................................................................................................ 10mA
RMS
(Internally Limited)
Output Power (per lamp) .................................................................................................................................................. 6W
Input Signal Voltage (BRITE Input) ................................................................................................................. -0.3V to 6.5V
Input Signal Voltage (
SLEEP
, V
SYNC
) ............................................................................................................... -0.3V to V
IN
Ambient Operating Temperature, zero airflow ................................................................................................... 0°C to 70°C
Storage Temperature Range ............................................................................................................................. -40°C to 85°C
Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of
specified terminal
RECOMMENDED OPERATING CONDITIONS
This module has been designed to operate over a wide range of input and output conditions. However, best efficiency and performance will be obtained if
the module is operated under the condition listed in the ‘R.C.’ Column. Min. and Max. columns indicate values beyond which the inverter, although
operational, will not function optimally.
Parameter Symbol
Recommended Operating Conditions
Units
Min R.C. Max
Input Supply Voltage Range (Functional) V
IN
8 12 16 V
Input Supply Voltage (Fully Regulated Lamp Current) 10.2 12 13.8 V
Output Power (Per Lamp) LXMG1621-01
LXMG1621-02
LXMG1621-04
P
O
4 5 W
2.5 3 W
2.75 3.5 W
Brightness Control Input Voltage Range V
BRT
_
ADJ
0.0 2.5 V
Lamp Operating Voltage LXMG1621-01
LXMG1621-02
LXMG1621-04
V
LAMP
500 625 750 V
RMS
350 425 500 V
RMS
470 550 640 V
RMS
Lamp Current LXMG1621-01
(Full Brightness – Per Lamp) LXMG1621-02
LXMG1621-04
I
OLAMP
7.0 mA
RMS
6.0 mA
RMS
6.0 mA
RMS
Operating Ambient Temperature Range T
A
0 70 °C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LXMG1621-xx.
Parameter Symbol Test Conditions
LXMG1621-xx
Units
Min Typ Max
`
OUTPUT PIN CHARACTERISTICS
Full Brightness Current LXMG1621-01
I
L(MAX)
V
BRT_ADJ
= 2.5V
DC
,
SLEEP
= HIGH,
Burst Duty = 100%, V
IN
= 12V
DC
6.3 7.0 7.7 mA
RMS
LXMG1621-02
V
BRT_ADJ
= 2.5V
DC
,
SLEEP
= HIGH,
Burst Duty = 100%, V
IN
= 12V
DC
5.5 6.0 6.5 mA
RMS
LXMG1621-04
V
BRT_ADJ
= 2.5V
DC
,
SLEEP
= HIGH,
Burst Duty = 100%, V
IN
= 12V
DC
5.5 6.0 6.5 mA
RMS
Minimum Lamp Current (Per Lamp)
(Notes 2 & 3)
I
L(MIN)
V
BRT_ADJ
= 0V
DC
,
SLEEP
= HIGH,
Burst Duty = 2%, V
IN
= 9V
DC
0.14 mA
RMS
V
BRT_ADJ
= -50mV
DC
,
SLEEP
= HIGH,
Burst Duty =0.5%, V
IN
= 9V
DC
0.035 mA
RMS
Lamp Start Voltage V
LS
0°C < T
A
< 40°C, V
IN
> 10.8V
DC
1500 1800 V
RMS
Operating Frequency f
O
V
BRT_ADJ
= 2.5V
DC
,
SLEEP
= HIGH,
V
IN
= 12V
DC
52 57 62 kHz
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright © 2007
Rev. 1.2, 2010-08-20
WWW.Microsemi .COM
RangeMAX
™
LXMG1621-xx
DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE
P
RODUCTION
D
ATA
S
HEET
TM
®
ELECTRICAL CHARACTERISTICS (CONTINUED)
Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LXMG1621-xx.
Parameter Symbol Test Conditions
LXMG1621-xx
Units
Min Typ Max
`
BRITE INPUT
Input Current I
BRT
V
BRT_ADJ
= 0V -6 -8 -10 µA
DC
Input Voltage For Max. Lamp Current V
C
I
O(LAMP)
= 100% Duty Cycle 2.5 2.6 V
DC
Input Voltage For Min. Lamp Current
(Note 3)
V
C
I
O(LAMP)
= 2% Duty Cycle 0 0 V
DC
I
O(LAMP)
= 0.5% Duty Cycle -50 mV
DC
`
SLEEP
INPUT
RUN Mode
(HI)SLEEP
V
2.2 V
IN
V
DC
SLEEP Mode
(LO)SLEEP
V
-0.3 0.8 V
DC
Input Current
SLEEP
I
SLEEP
= 5.0V
70 75 100 µA
DC
` V
SYNC
CHARACTERISTICS
Logic High Level V
SYNC(HI)
4.0 6.5 V
DC
Logic Low Level V
SYNC(LO)
-0.3 1.0 V
DC
Input Impedance Z
IN
60 66 75
K
Ω
Pulse Width (Note 4) t
PW
25 250 µs
Input Frequency f
SYNC
49 150 Hz
` POWER CHARACTERISTICS
Sleep Current I
IN(MIN)
V
IN
= 12V
DC
,
SLEEP
<
0.8V
5 50 µA
DC
Note 2: Minimum lamp current required to maintain even light output may vary with display panel.
Note 3: See 200:1 Dimming Application section for details.
Note 4: The module will be functional with pulse widths much larger than 250µs.
FUNCTIONAL PIN DESCRIPTION
Conn. Pin Description
CN1
CN1-1
V
IN
Input Power Supply (8V < V
IN
< 16V)
CN1-2
CN1-3
GND Power Supply Return
CN1-4
CN1-5
SLEEP
ON / OFF Control. (2.2V <
SLEEP
< VIN = ON, -0.3V <
SLEEP
< 0.8V = OFF)
CN1-6 BRITE Brightness Control (-0.3V to 2.5V
DC
). 2.5V
DC
gives maximum lamp current.
CN1-7, 8 VSYNC Vertical synchronization input 49Hz < f
SYNC
< 150Hz
CN2 thru CN5:
Refer to Connection Schematic Section
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
P1-P3P4-P6P7-P9P10-P10

LXMG1621-02

Mfr. #:
Buy LXMG1621-02
Manufacturer:
Microchip / Microsemi
Description:
EL/CCFL Inverters & Accessories CCFL Inverter Module - Dual Lamp
Lifecycle:
New from this manufacturer.
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