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參數(shù)資料
| 型號(hào)： | LXM1621-02 |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, XMA |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大小： | 206K |
| 代理商： | LXM1621-02 |
DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE
LXM1621-xx
PRODUCT DA T ABOOK 1996/1997
7
Copyright 1999
Rev. 0.5 11/99
P RELIMINAR Y D ATA S HEET
P A TENT P ENDING
RangeMAXTM
HOW RANGEMAX WORKS (continued)
HIGHLIGHTS
I On-board brightness control circuit includes a DC voltage
to pulse width converter that minimizes system design work
and system noise susceptibility. This provides a familiar
and convenient interface while reducing the potential for
externally induced noise which can cause lamp flicker.
I An on-board oscillator operates the inverter BURST rate
above 95Hz, well beyond standard 50/60Hz video refresh
rates where the eye can perceive pulsing light.
I RangeMAX inverter modules are designed to operate with
the burst frequency synchronized to the video frame rate.
This provides operation with no visible display disturbances
caused by beat frequencies between the lamps and video
frame rates.
I In applications with no access to a vertical sync, the in-
verter burst frequency can be allowed to "free run" at 95Hz.
In this non-synchronous mode, minor display disturbances
may be found under certain video conditions. This per-
formance is acceptable for many applications, but synchro-
nization must be used when no disturbance can be toler-
ated.
I Separate feedback loops for lamp current and open circuit volt-
age regulation insure reliable strike under all operating conditions,
automatic over-voltage prevention with broken or failed lamps,
and accurate lamp current regulation.
TYPICAL 100:1 DIMMING APPLICATION
I The brightness control may be a simple 10k
potentiometer or a voltage output DAC. A PWM signal
from a micro-controller may also be used with a suitable
filter such as shown in Figure 8A.
I If synchronization to the video framerate is desired,
connect the vertical sync pulse from the system video
controller to the appropriate V
SYNC input.
If no video
synchronization is desired, connect V
SYNC to ground.
I If you need to turn the inverter ON/OFF remotely, connect
a 3V or 5V logic signal to the SLEEP input. If remote ON/
OFF is not needed, connect the SLEEP input to V
IN or any
other voltage greater than 2.2V
DC.
I Connect V
HI to
high voltage wire from the lamp.
Connect V
LO to the low voltage wire (wire with thinner
insulation). If both lamp wires have heavy high voltage
insulation, connect the longest wire to V
LO.
V
LO is
connected directly to ground (GND pin) on the inverter
PCB. Always insure a good lamp return by using a
wire. Do not rely on a chassis ground connection.
FIGURE 8 — Potentiometer Brightness Control
FIGURE 8A — PWM Brightness Control
LXM1621-01
BRITE
V
HI1
V
IN
SLEEP
GND
Lamp
1
8V
DC- 18VDC
10k
5V
0V
V
LO
2.5V
DC
V
SYNC
V
SYNC
V
HI2
Lamp
2
4.99k
4.99k*
4.7F
PWM Signal
from System
LXM1621-01
BRITE
0
P.W. 100% of period
P.W.
100s
* use 4.99k for 5V PWM amplitude, 15k for 3.3V PWM
amplitude, and omit for 2.5V PWM amplitude.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LXM1621-03 | 功能描述:MOD INVERTER CCFL DIM DUAL 6.5MA RoHS:否 類別:光電元件 >> 反相器 系列:LXM1621 標(biāo)準(zhǔn)包裝:100 系列:- 輸入電壓:6.0V 輸出:900V 類型:用于 CCFL 和 UV 燈的逆變器 尺寸/尺寸:2.34" L x 0.35" W x 0.35" H（59.5mm x 9mm x 8.9mm） 安裝類型:底座安裝 |
| LXM1621-04 | 功能描述:MOD INVERTER CCFL DIM DUAL 5MA RoHS:否 類別:光電元件 >> 反相器 系列:LXM1621 標(biāo)準(zhǔn)包裝:100 系列:- 輸入電壓:6.0V 輸出:900V 類型:用于 CCFL 和 UV 燈的逆變器 尺寸/尺寸:2.34" L x 0.35" W x 0.35" H（59.5mm x 9mm x 8.9mm） 安裝類型:底座安裝 |
| LXM1621-XX | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:DIGITAL DIMMING DUAL LAMP CCFL INVERTER MODULE |
| LXM1622-05-01 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CCFL Inverter Module - Dual Lamp |
| LXM1622-05-02 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CCFL Inverter Module - Dual Lamp |
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