LX1686EIPW MICROSEMI, LX1686EIPW Datasheet

LX1686EIPW

Manufacturer Part Number
LX1686EIPW
Description
Manufacturer
MICROSEMI
Datasheet

Specifications of LX1686EIPW

Driver Type
CCFL
Operating Supply Voltage (typ)
3.3/5V
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Package Type
TSSOP
Pin Count
24
Mounting
Surface Mount
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LX1686EIPW
Manufacturer:
MSC
Quantity:
20 000
Part Number:
LX1686EIPW/TR
Manufacturer:
MICROSEM
Quantity:
20 000
Copyright © 2004
Rev. 1.1, 2006-02-27
IMPORTANT: For the most current data, consult MICROSEMI’s website:
Protected by U.S. Patents 5,615,093; 5,923,129; 5,930,121; 6,198,234; Patents Pending
IC provides all the control functions
needed to implement Microsemi’s
direct drive inverters used to operate
cold
(CCFL’s).
control
configurations. CCFL’s are used for
back or edge lighting of liquid crystal
flat panel displays (LCD’s) and
typically find application in notebook
computers, web browsers, automotive
and industrial instrumentation, and
entertainment systems.
controlled lamp current burst circuit
that can provide a > 100:1 dimming
range from a simple zero to 2.5V
potentiometer input.
dimming
synchronized to the LCD panel’s frame
rate to prevent interference from
optical beat frequencies.
The LX1686E Backlight Controller
The LX1686E
5
4
3
2
1
0
0
TM
cathode
single
burst
This IC can be used to
30
fluorescent
or
includes a PWM
rate
-40 to 85
45
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Standard Analog
Dimming Inverter
T
0 to 85
P R O D U C T H I G H L I G H T
Light Output (Nits)
A
multiple-lamp
(°C)
The PWM
is
D E S C R I P T I O N
60
lamps
easily
PW
75
Microsemi's
RangeMAX
a new dual feedback control loop that
permits regulation of maximum lamp
strike voltage as well as lamp current.
Regulating maximum lamp voltage
permits the designer to provide for
ample worst case lamp strike voltage
while at the same time conservatively
limit maximum open circuit voltage.
generation
module designer to optimize high
voltage
maximum operating efficiency with no
power dissipating overhead to guarantee
strike capability
resonant, oscillator-controlled PWM
regulation method.
allows a wide choice of fixed operating
frequencies to match lamp current
frequency to the lamp’s most efficient
operating point, and to minimize high
frequency interference.
RoHS compliant / Pb-free
Safety and reliability features include
An innovative new strike voltage
Direct drive topology is a non-
Plastic TSSOP
24-PIN
P A C K A G E O R D E R I N F O
LX1686ECPW
90
LX1686EIPW
Integrated Products
®
Microsemi
http://www.microsemi.com
transformer
technique
105
Light emitted by a CCFL is proportional to the current flowing through it.
There are two ways to control the current: by adjusting the amplitude of a
continuous AC current; or, as with RangeMAX technology, by varying the
amount of time a burst of full current is present. RangeMAX technology
frees the backlight inverter module designer to operate in a lower
brightness and lower power consumption mode than is possible with
conventional amplitude control methods.
The LX1686E
Digital Dimming CCFL Controller IC
enables
design
Note: Available in Tape & Reel. Append the
letters “TR” to the part number. (i.e.
LX1686ECPW-TR)
P
RODUCTION
the
for
RangeMAX™ Wide Range
Dimming (>100:1)
Synchronizable to Display Video
Frequency
High Voltage Feedback Loop
Directly Controls Maximum Open
Lamp
Micro-Amp Sleep Mode
User Programmable Fixed
Frequency Operation
Under-Voltage Lockout Feature
With Power-Up Reset
Built-In Soft-Start Feature
Operates With 3.3V or 5V power
Supplies
100mA Output Drive Capability
Notebooks
Instrumentation Display
Desktop Computer Monitors
Low Ambient Light Displays
(used in Aircraft, Automobiles,
and Hand-Held Equipment)
Extremely High Efficiency From
3.3V to 5V Power Supplies
Lower Cost Than Conventional
Buck / Royer Inverter Topologies
Improved Lamp Strike Capability
Improved Over-Voltage Control
D
ATA SHEET
K E Y F E A T U R E S
A P P L I C A T I O N S
B E N E F I T S
LX1686E
Page 1

Related parts for LX1686EIPW

LX1686EIPW Summary of contents

Page 1

... Plastic TSSOP PW 24-PIN Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. RoHS compliant / Pb-free LX1686ECPW-TR) LX1686ECPW LX1686EIPW Microsemi Integrated Products LX1686E D RODUCTION ATA SHEET RangeMAX™ Wide Range Dimming (>100:1) Synchronizable to Display Video Frequency ...

Page 2

... All of the above assume no ambient airflow. Copyright © 2004 Rev. 1.1, 2006-02-27 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Digital Dimming CCFL Controller IC , θ 100°C θ Microsemi Integrated Products LX1686E P D RODUCTION ATA SHEET OUT VSS_P 2 23 VSS ...

Page 3

... Forcing to ground or VDD will make the VCO oscillate at approximately AFD for setting Direct Drive PWM operating frequency. RAMP for setting Direct Drive PWM operating frequency. RAMP VCO for setting strike Frequency ramp slope. TRI Microsemi Integrated Products LX1686E D RODUCTION ATA SHEET . ICOMP . Controls soft- VCOMP ...

Page 4

... FVERT Frequency is 200Hz, VDD = 3V D_AFD V R_BRITE VDD or float; BRITE = 2.5V BRITE_FULL BRT_POS VBRT_POS = 0V, BRITE = 0.5V V VBRT_POS = VDD or float, BRITE = 0.5V BRITE_DARK VBRT_POS = 0V, BRITE = 2.5V Microsemi Integrated Products LX1686E P D RODUCTION ATA SHEET ≤ ≤ T 85°C for the LX1686E A = 0.22µ 0.047µ 110kΩ ...

Page 5

... AOUT, BOUT = 0V, VDD = 3V I SOUT_BUF AOUT, BOUT = 2V, VDD = Design Reference Only MAX_IR V VDD = 3V EN3V V VDD = 5.5V EN5.5 V H_EN3 V H_EN5.5 Microsemi Integrated Products LX1686E P D RODUCTION ATA SHEET ≤ ≤ T 85°C for the LX1686E A = 0.22µ 0.047µ 110kΩ PD PDB PD LX1686E ...

Page 6

... IAMP ICOMP - - + Current + Current Comparator Error Amp 2. Burst Comparator Triangle VDD VDD Wave Gen. RAMP_R RAMP_C C R RAMP RAMP2 Microsemi Integrated Products LX1686E P D RODUCTION ATA SHEET C ICOMP Output ICOMP Drivers PWM Controllers Output Steering VDD_P Logic BOUT B VSS_P CLK OUT ...

Page 7

... L 0. 6.25 *LC * Lead Coplanarity Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. Microsemi Integrated Products LX1686E D ATA SHEET M I ILLIMETERS NCHES MIN MAX MIN MAX 0.95 ...

Page 8

... 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 necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © ...

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