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  Microsemi Electronic Components Datasheet  

LX6512 Datasheet

High Performance CCFL controller

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TM
LX6512
® High Performance CCFL controller
PRODUCTION DATA SHEET
DESCRIPTION
Microsemi’s LX6512 is a cost effective, The LX6512 contains safety features
Direct Drive CCFL (Cold Cathode that limit the transformer secondary
Fluorescent Lamp) controller. The voltage and protect against fault conditions
integrated controller is optimized to drive which include open lamp, broken lamp
CCFL’s (Cold Cathode Fluorescent and short-circuit faults. The over voltage
Lamps) using either resonant full bridge fault shutdown is disabled during a user
inverter topology or push-pull Direct programmable interval to allow lamp
Drive configurations.
strike.
Resonant full bridge topology provides The controller can accept a brightness
near sinusoidal waveforms over a wide control signal that is either an analog
supply voltage range in order to maximize voltage level, or a direct low frequency
the life of CCFL lamps, control EMI PWM. Utilizing this signal it provides
emissions, and maximize efficiency. This CCFL brightness dimming control using
new architecture is also coupled with a digital dimming, to achieve a wide
wide dimming range capability.
dimming range (> 60 to 1).
For fixed input supply applications the An integrated 4V LDO (Low Dropout
LX6512 uses Direct Drive topology to Regulator) powers all internal control
supply fixed frequency PWM signals circuitry and up to 5mA for external
connected directly to the high voltage circuitry greatly simplifying supply
transformer primary via a single pair of N- voltage requirements.
FET drivers, providing a simple, low cost The LX6512 is available in a 16-Pin
inverter solution.
TSSOP and 3x3 mm 16pin QFN.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected by U.S. Patents: 5,615,093; 5,923,129; 5,930,121; 6,198,234; 7,112,929; Patents Pending
CN1
1
2
3
4
5
6
7
8
CON8
FUSE
F1
R5
115K
VDDA
R1 R7
61.9K 1M
C9
10uF
U2
C14 100pF
C2 100nF
C3 1uF
C5 3.9nF
1 BRITE_D
VIN_SNS 16
2 F_OSC
VDDA 15
3 B_OSC
VDDP 14
4 ENA
U1
LX6512
5 C_TO
AOH 13
BOH 12
6 EA_OUT
GND 11
7 V_SNS
AOL 10
8 ISNS
BOL 9
VDDA
C6
0.1uF
C4 1uF
45
36
27
18
T1
KEY FEATURES
Full Bridge or Direct Drive Push
Pull Configurable
Patented Striking Topology
Low Stress to Transformers
Wide Dimming Range
Programmable Operating
Dimming Frequency
Programmable Time Out
Protection
Fixed Operating Frequency
Open Lamp Voltage Protection,
Short Lamp Protection, Over
Voltage Protection
Compatible with Existing
Transformers
APPLICATIONS
Note Book LCD displays
Transportable Computers
Web Tablet LCD displays
Digital Picture Frame
Monitor / TV
Portable DVD Player
C13 100nF
C11
2pF PCB
C12
2.2nF
CN2
1
2
CON2
R4
374 Ohm
LOW COMPONENT COUNT REQUIREMENT FOR TOTAL SYSTEM SOLUTION
PACKAGE ORDER INFO
THERMAL DATA
LQ
Plastic 3x3 mm QFN 16-pin
TA (°C) PW
Plastic TSSOP 16-pin
RoHS Compliant / Pb-free
-20 to 70
LX6512CLQ or LX6512CPW
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
(i.e. LX6512CLQ-TR)
θJA = 33.3°C/W
θJA = 99 °C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the
device/pc-board system. All of the above assume no ambient airflow.
Copyright © 2007
Rev. 1.0, 2007-12-21
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1


  Microsemi Electronic Components Datasheet  

LX6512 Datasheet

High Performance CCFL controller

No Preview Available !

www.DataSheet4U.com
TM
®
INFORMATION
Thank you for your interest in Microsemi® Analog Mixed Signal products.
The full data sheet for this device contains proprietary information.
To obtain a copy, please contact your local Microsemi sales representative. The
name of your local representative can be obtained at the following link
http://www.microsemi.com/contact/contactfind.asp
or
Contact us directly by sending an email to:
IPGdatasheets@microsemi.com
Be sure to specify the data sheet you are requesting and include your company
name and contact information and or vcard.
We look forward to hearing from you.
Copyright
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570


Part Number LX6512
Description High Performance CCFL controller
Maker Microsemi Corporation
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