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CONFIDENTIAL
RangeMAX
T
HE
TM
LXM1614-12-01
ATA
12V HIGHLY-INTEGRATED, DIGITAL DIMMING CCFL INVERTER MODULE
I
NFINITE
P
OWER
OF
I
N N O VAT I O N
PRODUCT PREVIEW D
S
HEET
DESCRIPTION
Dual Drive, RangeMAX Wide Range Dimming, Single Output Inverter. The LXM1614 series of Direct DriveTM CCFL (Cold Cathode Fluorescent Lamp) Inverter Modules is specifically designed for driving LCD backlight lamps. Although similar to the RangeMAX LXM1612 wide range dimming inverters, the LXM1614 family offers two separate brightness controls for lamp current amplitude and duty cycle. This innovation of dual brightness controls with extended dimming, combined with Linfinity's high efficiency Direct Drive topology provides the industry's most feature rich, small form factor inverter available. The wide range dimming provides exceptional display readability at less than 1% of full brightness, allowing both power savings and low ambient light operating capability. Dual Drive Dimming Control. The inverters provide brightness adjustments utilizing standard lamp current amplitude control as well as supporting Linfinity's RangeMAX wide range dimming technique. Combining both brightness controls into a single inverter supports the "self heating" lamp technology by using a "boost" current feature and still offers duty cycle control for low brightness operation. This controlled overdrive capability eliminates the need for traditional resistive heater wire methods to ensure light output at extremely low temperatures. The LXM1614 brightness controls support temperature monitoring with look-up table applications by accepting either a PWM input or DC voltage. Large panel lamps with greater thermal inertia can also utilize this "instant-bright" feature and minimize warm up time. RangeMAX Digital Dimming Technique. Digital dimming provides flicker-free brightness control in any wide range dimming application. Dimming ratios greater than 100:1 can be achieved. A video synchronization feature allows wide ratio dimming without the display disturbances and interference seen with competitive products. The resultant "burst drive" that energizes the lamp was designed specifically to ensure that no premature lamp degradation occurs. Even in overdrive boost mode, the waveform is carefully controlled to minimize the effects detrimental to lamp life. Individual panel specifications should be referenced for specific thermal and electrical parameters. Direct Drive Technology. The module design is based on the Direct Drive topology, which provides a number of cost, performance, and form factor advantages. The LXM1614 series inverters eliminate the classic resonant inductor/capacitors, and integrate the wide range dimming logic into the controller. Additional Features. Other benefits of this new topology are fixed-frequency operation and secondary-side strike-voltage regulation. Strike-voltage regulation minimizes corona discharge in the output transformer and related circuitry, providing longer life and higher reliability. All LXM1614 modules feature both open and shorted lamp protection. The dual drive LXM1614 is fully customizable (electronically and mechanically) to specific customer requirements.
K E Y F E AT U R E S
s Independent Dual Brightness Controls For Lamp Current Amplitude And Duty Cycle s RangeMAX 1-100% Wide Range Dimming With Controlled Overdrive Boost s Available In +5V, +12V, and 10V-16V Input Voltage Versions s High Efficiency, Single Stage Direct Drive Topology s -30C to +85C Ambient Temperature Operation s Output Open/Short Circuit Protection s Automatic Strike-Voltage Regulation s Up to 1800V Output Voltage Capability s Supports A Wide Variety of Lamp Connectors s Single Sided PCB Component Layout
A P P L I C AT I O N S
s s s s s Self Heating Lamp Technology Extended Cold Temperature Operation Automotive And Aircraft Cabin Displays Navigation/GPS Systems/Auto PC CCFL Panels With Reduced Lamp Current Specifications s Low Ambient Light Conditions Requiring Wide Range Dimming s "Instant On" To Full Brightness For Large LCD Backlight Panels
BENEFITS
s High Efficiency And Sleep Mode Feature Extends Computer Battery Life s Lamp Current Amplitude Control Allows "Boost" And Accelerated Warm Up For Cold Temperature Operation s "Instant On" Minimizes Warm Up Time In Standard CCFL Applications s Optimized To Support Applications Utilizing Lamp Temperature Detection and Microprocessor Control Techniques s Power Efficient, "Low Brightness" Capability Allows For Advanced Power Management And Extends Battery Life In Portable Applications s Fixed Frequency Operation Reduces EMI and Display Interference Problems s Transformer Designed To Minimize Corona Discharge For Long Life And High Reliability s Controlled "Strike" Waveform Minimizes Damaging Overshoots
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
BACKLIGHT INVERTER COMBINES CURRENT AMPLITUDE AND DIGITAL TECHNIQUES
9mA 6mA
M O D U L E O R D E R I N F O R M AT I O N
LXM1614-12-01
Copyright (c) 1999 Rev. 0.1a 5/99
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
P AT E N T P E N D I N G
PRODUCT DATABOOK 1996/1997
LXM1614-12-01
12V HIGHLY-INTEGRATED, DIGITAL DIMMING CCFL INVERTER MODULE
PRODUCT PREVIEW D
ATA
RangeMAX
S
HEET
(Note 1)
TM
A B S O L U T E M A X I M U M R AT I N G S
Input Supply Voltage (VIN1) ..................................................................................................................................................... -0.3V to 16V Output Voltage, no load .............................................................................................................................. Internally Limited to 1800VRMS Output Current ............................................................................................................................................... 10mARMS (Internally Limited) Output Power ........................................................................................................................................................................................ 7.5W Input Signal Voltage (BRITE Input) ............................................................................................................................... -0.3V to VIN1+0.3V Input Signal Voltage (SLEEP, VSYNC Inputs) ................................................................................................................... -0.3V to VIN1+0.3V Ambient Operating Temperature, zero airflow .................................................................................................................... -30C to 85C Storage Temperature Range ................................................................................................................................................... -40C to 85C
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 the specified terminal.
R E C O M M E N D E D O P E R A T I N G C O N D I T I O N S (R.C.) 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
Input Supply Voltage Range Output Power Brightness Control Input Voltage Range Lamp Operating Voltage Lamp Current (Full Brightness) Operating Ambient Temperature Range
Symbol
VIN1 PO VBRT ADJ VLAMP IOLAMP TA
Recommended Operating Conditions Min. R.C. Max.
10 0.0 500 -30 12 3.5 2.5 700 6.5 16 4.0 VIN 1000 85
Units
V W V VRMS mARMS C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the recommended operating conditions and 25C ambient temperature for the LXM1614-12-01.
Parameter Output Pin Characteristics
Symbol
Test Conditions
LXM1614-12-01 Min. Typ. Max.
5.7 8.2 1500 63 6.5 9 0.12 1650 68 -700 -270 2.4 0 -700 -270 2.4 0 2.1 1.9 400 0 7.3 9.8 1800 73
Units
Full Bright Lamp Current IL (MAX) Maximum Lamp Boost Current ILBOOST (MAX) Min. Average Lamp Current (Note 2) IL (MIN) Lamp Start Voltage VLS Operating Frequency fO
VBRT ADJ = 2.5VDC, SLEEP = HIGH, Burst Duty=100%, VIN1 =12V VBRTADJ =2.5V, VBOOST =2.5V, SLEEP = HIGH, TA 0C, VIN1 =12V VBRT ADJ = 0VDC, SLEEP = HIGH, Burst Duty= 2%, VIN1 =12V -30C < TA < 85C, VIN1 5.0VDC VBRT ADJ = 2.5VDC, SLEEP = HIGH, VIN1 = 5VDC VBRT ADJ = 0VDC VBRT ADJ = 2.5VDC IO (LAMP) = 100% Duty Cycle IO (LAMP) = Minimum Duty Cycle VBST ADJ = 0VDC VBST ADJ = 2.5VDC IO (LAMP) = Maximum Boost IO (LAMP) = Minimum Boost VIN1 = 10V VIN1 = 16V SLEEP = 5.0V SLEEP = 0V
mA RMS mARMS mA RMS VRMS KHz ADC ADC VDC VDC ADC ADC VDC VDC VDC VDC ADC ADC
BRITE Input
Input Current Input Voltage for Max. Lamp Current Input Voltage for Min. Lamp Current IBRT VBRT ADJ VBRT ADJ IBST VBST ADJ VBST ADJ VSLEEP (HI) VSLEEP (LO) ISLEEP
BOOST Input
Input Current Input Voltage for Max. Lamp Current Input Voltage for Min. Lamp Current
SLEEP Input
RUN Mode SLEEP Mode Input Current
Note 2. Minimum lamp current required to maintain even light output may vary with display panel. Average RMS current = (burst duty cycle) x (burst amplitude of 6.5mARMS)
2
Copyright (c) 1999 Rev. 0.1a 5/99
PRODUCT DATABOOK 1996/1997
PATENT PENDING
RangeMAX
TM
LXM1614-12-01
12V HIGHLY-INTEGRATED, DIGITAL DIMMING CCFL INVERTER MODULE
PRODUCT PREVIEW D
ATA
S
HEET
E L E C T R I C A L C H A R A C T E R I S T I C S (continued)
Unless otherwise specified, these specifications apply over the recommended operating conditions and 25C ambient temperature for the LXM1614-12-01.
Parameter VSYNC Characteristics
Logic High Level Logic Low Level Input Impedance Input Frequency
Symbol
Test Conditions
LXM1614-12-01 Min. Typ. Max.
1.5 -0.3 20 2.5 0.8 27 5 1.2 200 0.5 10
Units
VSYNCH (HI) VSYNCH (LO) ZIN fSYNC IIN (MIN)
VIN1 = 10V VIN1 = 16V
VDC VDC k Hz ADC
Power Characteristics
Sleep Current VIN1 = 16VDC , SLEEP = 0.0V 0.0
FUNCTIONAL PIN DESCRIPTION
Conn. CN1
CN1-1 CN1-2 CN1-3 CN1-4 CN1-5 CN1-6 CN1-7 CN1-8
Pin
VIN1 GND SLEEP BRITE BOOST VSYNC VHI VLO
Description
Main Input Power Supply. (10V VIN1 16V) Power Supply Return. ON/OFF Control. (2.1V < SLEEP < VIN2 = ON, 0V < SLEEP < 0.8V = OFF, SLEEP Floating = OFF) Duty Cycle Brightness Control (0 to 2.5V). 2.5V gives 100% Duty Cycle. Current Amplitude Control (0 to 2.5V) 0V = Nominal Current, 2.5V = Maximum Boost Current. Vertical Synchronization Input. 2.5 to 5V Logic High Level (20Hz < fSYNC < 200Hz) High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length. DO NOT connect to Ground. Connection to low side of lamp. Connect to lamp terminal with longer lead length. DO NOT connect to Ground.
CN2
CN2-1 CN2-2
CONNECTORS
Connectors: CN-1 = JST 06FMS-1.0SP-TF
Recommended Mate: FFC and FPC: Lead pitch / 1.0mm(.039") Lead width / 0.7mm(.028") Mating part thickness / 0.30 0.05mm(.012" 0.002) Pins: SBHS-002T-P0.5, Housing: BHSR-02VS-1
CN-2 = JST SM02B-BHSS-1-TB
RangeMAX andDirect Drive are trademarks of Linfinity Microelectronics, Inc.
PRODUCT PREVIEW DATA - Information contained in this document is CONFIDENTIAL pre-production data, and is proprietary to LinFinity. It may not be distributed, copied or published without the express written consent of LinFinity. Product referred to herein is not guaranteed to achieve preliminary or production status, and product specifictions, configuration, and availability may change at any time.
Copyright (c) 1999 Rev. 0.1a 5/99
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