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PDF LX1695 Data sheet ( Hoja de datos )
| Número de pieza | LX1695 | |
| Descripción | Switched Royer CCFL Inverter Monitor IC | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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TM
LX1695
® Switched Royer CCFL Inverter Monitor IC
PRODUCTION DATA SHEET
DESCRIPTION
The LX1695 is a general purpose The DIM_FREQ pin can also accept
DC to PWM generator with an external clock signal to program
supervisory functions for switched and/or synchronize the Royer output
Royer CCFL inverter modules used in frequency.
single or multiple lamp desktop This low cost eight pin IC includes
monitors and LCD TV sets. It under-voltage lockout and a logical
integrates a PWM that generates ENABLE input that permits shutting
digital (burst mode) dimming from a down the Royer inverter(s) remotely
DC brightness control input, and a without removing their power. A single
protection circuit that shuts off the output pin can be expanded with
Royer oscillator if lamp ignition does external transistors to drive any number
not occur in a timely manner, or in the of Royer circuits, giving a single device
event of one or more open lamps. the ability to control very large displays
Strike and initial open lamp timeout is for LCD TV applications or single lamp
user programmable with an external panels in notebooks and web tablets.
RC, and PWM frequency is The device is available in either an 8
programmable with a single external pin plastic DIP or SOIC package.
resistor.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
PRODUCT HIGHLIGHT
KEY FEATURES
Single Resistor Programs
Output Frequency
Allows External Synchronized
PWM
Open Lamp Sense Protection
Programmable Fault Delay
Enable and UV Lockout
Preset 3.125% Minimum
Output Duty Cycle
APPLICATIONS/BENEFITS
DC to PWM Generator
Single or Multi Lamp Designs
Desktop Monitors
LCD TV
Industrial Displays
External CLK Override
allows Syncronization
30 to 600 Hertz x 512
OPTIONAL
ENABLE
Logic High Enable
BRITE_IN
Duty Cycle Control
0 to 2V = 3% to 100%
Wide Range Dimming For a Fixed Royer Inverter
Single Resistor sets
Programmable Clock Frequency
DIM_FREQ OLSNS
ENABLE
GND
LX1695
FLT_DLY ROYER
BRITE_IN
VDD
Open Lamp Detection Input
Gated for Royer High
Royer Bias Drive 30 to 600 Hertz
Royer Inverter
VDD
Fixed Input
Supply 4.5 to 5.5V
Programmable lamp
strike interval at
power on or enable
Copyright © 2004
Rev. 1.0a, 2006-01-06
TJ (°C)
-40 to 85
PACKAGE ORDER INFO
Plastic DIP
M 8-Pin
RoHS / Pb-free
Plastic SOIC
DM 8-Pin
RoHS / Pb-free
LX1695IM
LX1695IDM
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e.
LX1695IDM-TR)
RoHS compliant.
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page  
LX1695
TM ® Switched Royer CCFL Inverter Monitor IC
PRODUCTION DATA SHEET
CN1
VIN
GND
+5V
ENABLE
BRITE_IN
APPLICATION CIRCUIT
F1
C1
L1
LX1695 Circuit
+5V VINS
Approximate
DIM FREQ =
6300
[Hz], R [KΩ]
R2
R2 24.9K 1%
Enable
+5V
R5 2.2M
C5
1µF
R1 510
1
DIM_FREQ
2
ENA
3
FLT_DLY
4
BRITE_IN
LX1695
8
OLSNS
7
GND
ROYER
VDD
6
+5V
5
C6
1µF
D1
BAV70
N.C.
C4
R3 0.22µF R4
56K 470
VINS
Q3 DTA114
R6 10K
Q4
BC847A
T1
ROYER TX
C2
C3
Q1
Q2
VIN
Royer Input Voltage (Buck Output)
+5V
5VDC for LX1695
5V ±5%
100mA
ENABLE
CIRCUIT On / Off Signal
5V Logic Level > 2.4V : On | <0.8V : Off
BRITE_IN
Burst Duty Control Voltage
0V ~ 2V = 3.125% ~ 100%
CN2
Q5 DTC144
Option: If system can not
provide 5V, use this circuit.
D2
5.6V
Figure 2 – Typical Application
Copyright © 2004
Rev. 1.0a, 2006-01-06
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LX1695.PDF ] | |
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