參數資料
型號： LX1991
廠商： Microsemi Corporation
英文描述： Six Output Programmable LED Current Sink
中文描述： 六輸出可編程LED電流水槽
文件頁數： 1/9頁
文件大?。?/td> 277K
代理商： LX1991
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2001
Rev. 1.0, 5/18/2005
W
M
.
C
LX1991
Six Output Programmable LED Current Sink
P
RODUCTION
D
ATA
S
HEET
TM
D E S C R I P T I O N
LED Display Driver:
This six channel
current sink driver is ideal for controlling
brightness and hue of high quality
dimmable LED displays. High accuracy,
dual mode dimming, and controlled current
switching time provides consistent color
hue, at brightness ratios of up to 1000:1,
and keeps electro magnetic emissions in
check.
Its wide compliance voltage range
combined with 43 volt breakdown cap-
ability make the LX1991 ideal for
automotive in-dash displays.
Precision current control
: Precision
current mirror circuitry sets all channels to
the same current with a single programming
input. Sinking current value can be pro-
grammed up to 30 mA per channel with a
single resistor or potentiometer from I
SET
+
to
I
SET
-
. Channel to channel matching is ty-
pically within ±1 percent of channel mean
at the rated output current.
Dual Mode Dimming:
Display dimming
can be achieved by controlling either
current amplitude or duty cycle, and both
methods can be employed at the same time.
1000:1 Dimming Range:
The DIG_DIM
input accepts a TTL or CMOS logic signal
that controls duty cycle of the output
currents.
Independent Channels
: The six channels
feature independent regulation with respect
to output voltage, so one does not affect the
others. Any one or more outputs can be left
unloaded
without
regulation of the other channels. Multiple
channels can also be connected together to
sink more current in a single load.
EMI Control:
Rise and fall time of sink
currents are precisely controlled by placing
a capacitor on the SLOPE_C pin. Special
control circuitry maintains symmetrical rise
and fall times, preserving the LX1991’s
ability to provide accurate output current
response to very narrow input pulses on the
DIG_DIM pin.
Power Handling:
The LX1991 is
supplied in a 4x4 MLPQ package capable
of 1.5 watts dissipation. Logic Enable: A
separate input puts the LX1991 to sleep at
less than 1 uA I
DD
.
affecting
current
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
K E Y F E A T U R E S
Six precision independent
current sink channels
Simultaneous Analog and
Digital Dimming Modes
Precision programming of
current rise & fall times
1% band gap reference
40 volt rated output stages
3V / 5V logic input compatible
1.5 watt power dissipation
On-chip thermal shutdown
16 Pin 4 x 4 MLPQ Package
B E N E F I T S
Consistent LED color hue
results from high current
accuracy
1000:1 dimming ratio with
digital dimming
Lowered emissions with
current slope programming
Reduced component count
for compact designs
Drive up to 108 colored
LED’s per IC (6 x 18 @ 2.1
volts)
Drive up to 60 white or blue
LED’s per IC (6 x 10 @ 3.8
volts)
P R O D U C T H I G H L I G H T
+36V
LX1991
1.5K
ON
OFF
SLEW CONTROL
GND
ISET+
ENA
DIG_DIM
CSLOPE
VDD
SINK1
SINK2
SINK3
SINK4
SINK5
SINK6
PWM
SIGNAL
5V
54 White LED’s
V
~3.7V
@20mA
ISET-
LX1991
Bill of Materials
1
1
1
54
White LEDs
57
LX1991
Cap
Resistor
Total Count
P A C K A G E O R D E R I N F O
LQ
RoHS Compliant / Pb-free Transition DC: 0436
LX1991ILQ
Plastic 4x4 MLPQ
16-PIN
T
J
(
°
C)
M
IN
V
DD
M
AX
V
DD
-40 to 85
4.5
5.5V
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1991ILQ-TR)
L
X
1
9
9
1
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參數描述
LX1991 EVAL KIT 功能描述:KIT EVALUATION FOR LED DRIVER RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅動器 系列:- 標準包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關產品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD
LX1991-01EVALKIT 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LED Driver
LX1991-02EVAL 功能描述:BOARD EVAL LED DRIVER 6CHANNEL RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅動器 系列:- 標準包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關產品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD
LX1991-03EVAL 功能描述:BOARD EVAL LED DRIVER 6 CHANNEL RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅動器 系列:- 標準包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關產品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD
LX1991-03EVALKIT 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LED Driver
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