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參數(shù)資料
| 型號(hào)： | LX1691IPWTR |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.1 A FLUORESCENT LIGHT CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, TSSOP-16 |
| 文件頁(yè)數(shù)： | 10/15頁(yè) |
| 文件大小： | 270K |
| 代理商： | LX1691IPWTR |
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Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright
2003
Rev. 1.0, 7/16/2004
WWW
.Microse
m
i
.CO
M
LX1691
Enhanced Multi-Mode CCFL Controller
PRODUCTION DATA SHEET
TM
FUNCTIONAL PIN DESCRIPTION ( C ONTI NUE D )
PIN NAME
DESCRIPTION
BRITE_OUT
Brightness Reference Current Output. This variable current source is the mirror of BRITE_R current multiplied
by the BRITE_IN signal and becomes the reference voltage to the error amplifier when DIM_MODE is open or
VDDA. Connecting an additional resistor to VDDA determines minimum lamp current in order to prevent fault
condition. A light sensor (LX1970) may be used in conjunction with BRITE_OUT to change amplitude of lamp
current in response to ambient light intensity.
VBRITE_OUT = VBRITE_IN X BRITE_OUT/BRITE_R (When DD_CLK is connected to VDDA)
VBRITE_OUT = (2-VBRITE_IN) X BRITE_OUT/BRITE_R (When DD_CLK is connected to GND)
When DIM_MODE is GND or VDDA, then BRITE_OUT has to be biased with an external resistor.
BRITE_R
Dedicated bias resistor for BRITE_OUT current source when DIM_MODE is open or VDDA. Connecting an
additional resistor to VDDA determines minimum Burst Duty Cycle in digital dimming. A light sensor (LX1970)
may be used in conjunction with BRITE_R to change Burst Duty Cycle in response to ambient light intensity.
DIMMING TABLE
DESCRI PTION
DIM_
MODE
DD_
CLK
CONDITIONS
Reversed Internal Digital
Dimming
Internally Clocked PWM
Burst Generator, External
Input to BRITE_IN
Low
Voltage at BRITE_IN controls lamp current burst duty cycle. Duty cycle is inversely
proportional to voltage at BRITE_IN. Burst period is LX1691 oscillator frequency
divided by 1024 (lamp current frequency divided by 512). An external voltage
connected to the BRITE_OUT pin sets lamp current amplitude.
Conventional Internal
Digital Dimming
Internally clocked PWM
Burst Generator, External
Input to BRITE_IN
0V
High
Voltage at BRITE_IN controls lamp current burst duty cycle. Duty cycle is directly
proportional to voltage at BRITE_IN. Burst period is LX1691 oscillator frequency
divided by 1024 (lamp current frequency divided by 512). An external voltage
connected to the BRITE_OUT pin sets lamp current amplitude
Conventional External
Digital Dimming
Externally clocked PWM
burst generator, external
input to BRITE_IN
VDDA
Pulse
Voltage at BRITE_IN controls lamp current burst duty cycle. Duty cycle is directly
proportional to voltage at BRITE_IN. Burst period is DD_CLK input divided by 512. An
external voltage connected to the BRITE_OUT pin sets lamp current amplitude.
Reversed Analog
Amplitude Dimming
Low
Voltage at BRITE_IN controls lamp current amplitude. Amplitude is inversely
proportional to voltage at BRITE_IN.
Conventional Analog
Amplitude Dimming
High
Voltage at BRITE_IN controls lamp current amplitude. Amplitude is directly proportional
to voltage at BRITE_IN.
Conventional Analog
Amplitude Dimming with
External Direct PWM
Control
VDDA
or open
Pulse
Voltage at BRITE_IN controls lamp current amplitude. Amplitude is directly proportional
to voltage at BRITE_IN.
Burst period and duty cycle are directly proportional to signal at DD_CLK input pin. If
held low, duty cycle is 0% (Zero duty will cause a fault shut down. Minimum duty to
prevent fault shut down is lamp and temperature dependent. User must characterize
lamp to determine minimum duty cycle.). If held high, duty cycle is 100% (full
brightness).
PP
AA
CC
KK
AA
GG
EE
DD
AA
TT
AA
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX1691IPW-TR | 制造商:Microsemi Corporation 功能描述:CCFL DRVR 5.5V 16TSSOP - Tape and Reel |
| LX1692 | 制造商:MITSUMI 制造商全稱:Mitsumi Electronics, Corp. 功能描述:Full Bridge Resonant CCFL Controller |
| LX1692A | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Full Bridge Resonant CCFL Controller |
| LX1692AIPW | 制造商:Microsemi Corporation 功能描述:FULL BRIDGE RESONANT CCFL CONTROLLER 制造商:Microsemi Corporation 功能描述:CCFL DRVR 22V 20TSSOP - Bulk 制造商:Microsemi Corporation 功能描述:LX1692AIPW Series 7 to 22 V Supply Voltage Full Bridge CCFL Controller- TSSOP-20 制造商:MS4 功能描述:LX1692AIPW Series 7 to 22 V Supply Voltage Full Bridge CCFL Controller- TSSOP-20 |
| LX1692B | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Full Bridge Resonant CCFL Controller |
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