lx1692 Microsemi Corporation, lx1692 Datasheet

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lx1692

Manufacturer Part Number
lx1692
Description
Ccfl Backlight Controller Ic
Manufacturer
Microsemi Corporation
Datasheet

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Copyright © 2004
Rev. 1.2, 12/20/2006
1
Arc protection is provided if the arcing level is enough to be trigged.
reduced, third generation Direct Drive
CCFL (Cold Cathode Fluorescent
Lamp)
controller is
CCFL’s using resonant full bridge
inverter topology.
provides near sinusoidal waveforms
over a wide supply voltage range in
order to maximize the life of CCFL
lamps, control EMI emissions, and
maximize efficiency. This new archi-
tecture also provides a wide dimming
range.
features that limit the transformer
secondary voltage and protect against
fault conditions which include open
lamp, broken lamp and short-circuit
faults.
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; 7,112,929; Patents Pending
Microsemi’s LX1692 is a cost
Resonant
The
TM
controller.
LX1692
LX1692
C_R
I_R
C_BST
C_TO
BRITE_IN
EA_OUT
full
optimized
Part
bridge
includes
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
ISNS
The
-20 to +85
P R O D U C T H I G H L I G H T
T
C
D
A
B
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1692IPW-TR)
A
(°C)
integrated
to drive
D E S C R I P T I O N
topology
V
SUPPLY
safety
DUAL
DUAL
FET
FET
PW
brightness
dimming, digital dimming, or combined
analog and digital dimming methods
simultaneously to achieve the widest
dimming range (> 60 to 1).
control signal that is either an analog
voltage or a direct low frequency PWM.
gate drivers for the four external power
MOSFETs.
internal control circuitry which greatly
simplifies supply voltage requirements.
TSSOP and SOIC.
RoHS Compliant / Pb-free
The LX1692 regulates the CCFL
The LX1692 can accept a brightness
The LX1692 also features integrated
An integrated 4V LDO powers all
The LX1692 is available in a 20-Pin
P A C K A G E O R D E R I N F O
Plastic TSSOP
20-Pin
LX1692IPW
Integrated Products Division
®
Microsemi
http://www.microsemi.com
in
three
Full Bridge Resonant CCFL Controller
ways:
DW
analog
P
RoHS Compliant / Pb-free
RODUCTION
Plastic SOIC
20-Pin
LX1692IDW
For Wide Voltage Range Inverter
Application (7V to 22V)
Patent Resonant Strike for
Unsurpassed Striking Power
Combined with Best Efficiency
Low Stress to Transformers
Excellent Open Circuit Voltage
Regulation Reduces Transformer
Breakdown Voltage
Requirements While Striking
Higher Voltage Lamps
One Inverter for Multiple Panel
Types
Wide Dimming Range
Fool-Proof Striking
Programmable Burst Dimming
Frequency
Programmable Time Out
Protection
Fixed Operating Frequency
Open Lamp Voltage Protection,
Short Lamp Protection, Arc
Protection
Even Display Light Distribution
Longer Lamp Life with Optimized
Lamp Current Amplitude
Reduced Operating Voltage
Lowers Corona Discharge and
Prolongs Module Life
High “Nits / Watt” Efficiency
Makes Less Heat and Brighter
Displays
LCD TV
LCD Monitor
D
Analog Dimming: >3 to 1
Digital Dimming : >20 to 1
Combined: >60 to 1
ATA
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
S
HEET
1
LX1692
Page 1

Related parts for lx1692

lx1692 Summary of contents

Page 1

... ISNS T (°C) A -20 to +85 Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1692IPW-TR) 1 Arc protection is provided if the arcing level is enough to be trigged. Copyright © 2004 Rev. 1.2, 12/20/2006 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® ...

Page 2

... MBIENT JA x θ Description Ω Freq is in KHz). Microsemi Integrated Products Division LX1692 RODUCTION ATA HEET VDDA 1 20 C_R C_BST C_TO ...

Page 3

... Full Bridge Resonant CCFL Controller P Description Ω and nF, F I_R C_BST DIM Ω where and µF I_R C_TO = ⋅ 005 Microsemi Integrated Products Division LX1692 D S RODUCTION ATA HEET Page 3 ...

Page 4

... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Full Bridge Resonant CCFL Controller P RODUCTION Description Ω ON nominal = 30 DS Ω ON nominal = 30 DS Ω ON nominal = 30 DS Ω ON nominal = The output driver stages are powered directly from DC Microsemi Integrated Products Division LX1692 D S ATA HEET are PEAK . An abnormal DC Page 4 ...

Page 5

... LAMP_REG VDDP = 5.5V VL RVV VL RPV LFJ VIN = 8V, C_P = C_R = 100pF, R_P = TBD, V RPCV VDDP = 5V I VRVV Microsemi Integrated Products Division LX1692 RODUCTION ATA HEET ≤ ≤ T 70°C except where A LX1692 Min Typ Max 4.5 5.5 3.8 4.0 4 1.6 1.85 2.0 500 2.4 VDDP 0 0 100 3.8 4.2 200 0 VDDP 1 ...

Page 6

... I_R = 40K T VOC_SNS >2.0V, Lamp Freq = 60Khz OC T VOV_SNS < 0.5V, VISNS < 1V SL_STK T VOV_SNS < 0.5V, VISNS > 0.3V SL_RUN T VOV_SNS > 3.2V, pulsed input OSL Microsemi Integrated Products Division LX1692 RODUCTION ATA HEET ≤ ≤ T 70°C except where A LX1692 Min Typ Max 1.0 75 0.9 1.0 1.1 0.27 0.3 0.33 1.8 2 2.2 128 8 3.6 0.3 0.843 -0.443 2.13 -1.73 3.5 3.0 3.2 3.4 1 ...

Page 7

... VOL =2000pF AOUT BOUT COUT DOUT t OFF Microsemi Integrated Products Division LX1692 D S RODUCTION ATA HEET ≤ ≤ T 70°C except where A LX1692 Units Min Typ Max - +4.0 -4 +4.0 -0.3 VDDP 100 220 410 µmho 100 100 0 VDDA -100 0 100 10 ...

Page 8

... Detection & VDDA Timer Logic + LDET - 2V 0 SEL 1 OUT Resonant Timing Detection & Control Logic DIM Figure 1 – Block Diagram Microsemi Integrated Products Division LX1692 RODUCTION ATA HEET VDDP VDDP AOUT BOUT PWM Output GND Block Driver COUT DOUT VDDP 1.0V/0.3V ...

Page 9

... COUT_P DOUT_P AOUT T1 DOUT_P BOUT 0 BOUT QB VIN T1-T2 VIN T4-T5 VIN T7-T8 Figure 2 – State Diagram Microsemi Integrated Products Division LX1692 RODUCTION ATA HEET VIN T1 C1 T2-T3 VIN T1 C1 T5-T6 Page 9 ...

Page 10

... C2 5.1V GND 16 COUT Part C16 0.1µF DOUT 14 ISNS 13 OVSNS 12 C6 15nF ICOMP 11 OC_SNS Figure 3 – Schematic Microsemi Integrated Products Division LX1692 D S ATA HEET C10 10µF CN2 C11 2.2µF CON2 G2P D2P C14 100nF T1 1:N S2P S1N C12 18pF 3KV G1N D1N U2 ...

Page 11

... M PERATING ODES Two operating modes, Strike and Run, are employed by the LX1692. Upon power up or ENABLE going true, strike mode is entered. After a successful strike, e.g., lamp is ignited, run mode is entered. If ignition is unsuccessful the lamp extinguishes while running, a fault is declared and the controller automatically shuts down. ...

Page 12

... Separate input pins are available for digital and analog dimming modes for maximum flexibility. truth table below. Digital dimming rise and fall times can be controlled by the ICOMP capacitor (See Dimming Modes Table). Microsemi Integrated Products Division LX1692 D S ATA HEET at DC ...

Page 13

... Full Bridge Resonant CCFL Controller P RODUCTION BRITE A BRITE D ISNS 0 – 2V VDDA VDDA VDDA 0–2V VDDA PWM VDDA 0.5-2.5V 0 -2V 0.5-2.5V Microsemi Integrated Products Division LX1692 D S ATA HEET CBST I Range cap 3:1 cap 1:3 cap 60:1 Cap 30:1 Cap 60:1 Page 3 ...

Page 14

... 10.26 *LC *Lead Coplanarity Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. dimension shall not include solder coverage. Microsemi Integrated Products Division LX1692 D S RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN ...

Page 15

... Copyright © 2004 Rev. 1.2, 12/20/2006 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Full Bridge Resonant CCFL Controller P RODUCTION Microsemi Integrated Products Division LX1692 D S ATA HEET Page 5 ...

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