900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  Microsemi Electronic Components Datasheet  

LX1692B Datasheet

Full Bridge Resonant CCFL Controller

No Preview Available !

www.DataSheet4U.com
TM
LX1692B
® Full Bridge Resonant CCFL Controller
PRODUCTION DATA SHEET
DESCRIPTION
Microsemi’s LX1692B is a cost The LX1692B regulates the CCFL
reduced, third generation CCFL (Cold brightness in three ways: analog
Cathode Fluorescent Lamp) controller. dimming, digital dimming, or combined
The integrated controller is optimized analog and digital dimming methods
to drive CCFL’s using resonant full simultaneously to achieve the widest
bridge inverter topology.
dimming range (> 60 to 1).
Resonant full bridge topology The LX1692B can accept a
provides near sinusoidal waveforms brightness control signal that is either
over a wide supply voltage range in an analog voltage or a low frequency
order to maximize the life of CCFL PWM.
lamps, control EMI emissions, and The LX1692B also features
maximize efficiency. This new archi- integrated gate drivers for the four
tecture also provides a wide dimming external power MOSFETs.
range.
An integrated 4V LDO powers all
The LX1692B includes safety internal control circuitry greatly
features that limit the transformer simplifying supply voltage require-
secondary voltage and protect against ments.
fault conditions which include open The LX1692B is available in a 20-
lamp, broken lamp, and short-circuit Pin TSSOP and SOIC.
faults.
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
PRODUCT HIGHLIGHT
LX1692B
C_R
A
I_R B
CC__BTOSPT art
C
D
BRITE_IN
EA_OUT ISNS
VSUPPLY
DUAL
FET
DUAL
FET
KEY FEATURES
ƒ For Wide Voltage Range Inverter
Application (7V to 22V)
ƒ Low Stress to Transformers
ƒ Wide Dimming Range
Analog Dimming: >3 to 1
Digital Dimming : >20 to 1
Combined: >60 to 1
ƒ Programmable Burst Dimming
Frequency
ƒ Programmable Time Out
Protection
ƒ Fixed Operating Frequency
ƒ Open Lamp Voltage Protection,
Short Lamp Protection, Arc
Protection1
BENEFITS
ƒ Even Display Light Distribution
ƒ Longer Lamp Life with Optimized
Lamp Current Amplitude
ƒ Reduced Operating Voltage
Lowers Corona Discharge and
Prolongs Module Life
ƒ High “Nits / Watt” Efficiency
Makes Less Heat and Brighter
Displays
APPLICATIONS
ƒ LCD TV
ƒ LCD Monitor
TA (°C)
-20 to +85
PACKAGE ORDER INFO
Plastic TSSOP
PW 20-Pin
Plastic SOIC
DW 20-Pin
RoHS Compliant / Pb-free
RoHS Compliant / Pb-free
LX1692BIPW
LX1692BIDW
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1692BIPW-TR)
1 Arc protection is provided if the arcing level is enough to be trigged.
Copyright © 2005
Rev. 1.1, 12/20/2006
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1


  Microsemi Electronic Components Datasheet  

LX1692B Datasheet

Full Bridge Resonant CCFL Controller

No Preview Available !

www.DataSheet4U.com
TM
LX1692B
® Full Bridge Resonant CCFL Controller
PRODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS
Supply Input Voltage(VDDP)........................................................................................ 6V
VIN_SNS ..................................................................................... -0.3V to VDDP+0.5V
Digital Input (ENABLE)................................................................. -0.3V to VDDP+0.5V
Analog Inputs (ISNS, OV_SNS, OC_SNS)clamped to ±14V Max Peak Current ±100mA
Analog Inputs (BRITE_A, BRITE_D)........................................... -0.3V to VDDP +0.5V
Digital Outputs (AOUT, BOUT, COUT, DOUT).......................... -0.3V to VDDP +0.5V
Analog Outputs (I_R, ICOMP, VCOMP) ..................................... -0.3V to VDDP + 0.5V
Maximum Operating Junction Temperature .............................................................150°C
Storage Temperature Range........................................................................... -65 to 150°C
Peak Package Solder Reflow Temp. (40 seconds maximum exposure)........260°C(+0, -5)
Note: 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.
THERMAL DATA
DW Plastic SOIC 20-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
85°C/W
PW Plastic TSSOP 20-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
99°C/W
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.
PACKAGE PIN OUT
VDDA
C_R
C_BST
C_TO
I_R
ENABLE
BRITE_A
VIN_SNS
BRITE_D
VCOMP
1 20
10 11
PW PACKAGE
(Top View)
VDDP
AOUT
BOUT
GND
COUT
DOUT
ISNS
OV_SNS
ICOMP
OC_SNS
VDDA
C_R
C_BST
C_TO
I_R
ENABLE
BRITE_A
VIN_SNS
BRITE_D
VCOMP
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
DW PACKAGE
(Top View)
VDDP
AOUT
BOUT
GND
COUT
DOUT
ISNS
OV_SNS
ICOMP
OC_SNS
RoHS / Pb-free 100% Matte Tin Lead Finish
Name
C_R
I_R
FUNCTIONAL PIN DESCRIPTION
Description
Lamp Frequency Programming Capacitor Pin – lamp running frequency is set by the combination of C_R and
I_R. The internal lamp current oscillator frequency can be forced to follow an external clock signal at this pin. In
this case, the programmed frequency must be lower than the external frequency. Minimum pulse width for
external synch signal is 1µsec. Maximum duty is 50%
Current Reference Resistor Input. Connects to an external resistor that determines the magnitude of the
internal bias currents. The I_R pin is a DC reference voltage of 1V. This voltage should only be used for its
intended function. The reference current established at this pin, by connecting an external resistor, is used to
charge a capacitor at the C_R pin. The nominal lamp frequency can be adjusted by varying this resistor value in
the range of 20K to 100K Ohms. (Note: C is in pF, R is in KΩ , Freq is in kHz).
FLAMP
=
242 × 103
CC _ R RI _ R
Other reference currents derived from I_R are used for the digital dimming burst oscillator and the strike time
out function.
Copyright © 2005
Rev. 1.1, 12/20/2006
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2


Part Number LX1692B
Description Full Bridge Resonant CCFL Controller
Maker Microsemi Corporation
PDF Download

LX1692B Datasheet PDF






Similar Datasheet

1 LX1692 Full Bridge Resonant CCFL Controller
Microsemi Corporation
2 LX1692A Full Bridge Resonant CCFL Controller
Microsemi Corporation
3 LX1692B Full Bridge Resonant CCFL Controller
Microsemi Corporation





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy