參數(shù)資料
型號： LX1744
廠商： Microsemi Corporation
元件分類： LED驅(qū)動器
英文描述： Dual Output Boost ? LED Driver / LCD Bias
中文描述： 雙輸出升壓？ LED驅(qū)動器/ LCD偏置
文件頁數(shù)： 4/16頁
文件大?。?/td> 571K
代理商： LX1744
LX1744
P
RODUCTION
D
ATASHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
W
M
.
C
Dual Output Boost – LED Driver / LCD Bias
I N T E G R A T E D P R O D U C T S
Copyright
2000
Rev. 1.1b, 2005-03-01
E L E C T R I C A L C H A R A C T E R I S T I C S
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0
°
C
≤
T
A
≤
70
°
C except where
otherwise noted and the following test conditions:
V
IN
= 3V, I
LED
= 20mA
,
1
SHDN
= V
IN
,
2
SHDN
= V
IN
LX1744
Typ
Parameter
Symbol
Test Conditions
Min
Max
Units
`
LED DRIVER
V
BRT
= 100mV
V
BRT
= 20mV
V
LFB
= 100mV
BRT = V
REF
95
5
-100
0.0
0
100
20
115
35
100
V
IN
60
LFB Threshold Voltage
V
LFB
mV
LFB Input Bias Current
BRT Input Voltage Range
BRT Input Bias Current
LED Driver Shutdown Input
Bias Current
LED Driver Shutdown High
Input Voltage
LED Driver Shutdown Low Input
Voltage
Current Sense Bias Current
Efficiency
DRV Sink/Source Current
DRV On-Resistance
Maximum Switch On-Time
Minimum Switch Off-Time
nA
V
nA
V
BRT
I
1
SHDN
0.0V
≤
LSHDN
≤
V
IN
-100
100
nA
V
1
SHDN
V
IN
= 2V
1.6
V
V
1
SHDN
V
IN
= 2V
0.4
V
I
CS
η
t
ON
t
OFF
I
LOAD
= 2mA
V
IN
= 5V, DRV = 3V
V
CC
= 5V
V
FB
= 1V
V
FB
= 1V
R
CS
= 0
R
CS
= 2k
V
FB
= 1.4V
SHDN
= GND
4
90
100
12
300
170
210
1.21V
1.196
μ
A
%
mA
μ
S
nS
85
200
1.15
1.172
15
∞
410
1.26
25
1.220
200
Switch Peak Current
I
PK
mA
OVP Threshold Voltage
LCD BIAS
Output Voltage Range
FB Threshold Voltage
FB Input Current
LCD Bias Shutdown Input Bias
Current
LCD Bias Shutdown High Input
Voltage
LCD Bias Shutdown Low Input
Voltage
Peak Inductor Current Limit
Internal NFET On-resistance
Switch Pin Leakage Current
Efficiency
Switch On-Time
Switch Off-Time
ADJ Input Voltage Range
ADJ Input Bias Current
ENTIRE REGULATOR
Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
Reference Voltage
V
OVP
V
OUT
V
FB
I
SHDN
V
V
V
nA
`
100
nA
V
SHDN
V
IN
= 2V
1.6
V
V
SHDN
I
LIM
R
DS(ON)
I
LEAK
η
t
ON
t
OFF
V
ADJ
I
ADJ
V
IN
V
IN
= 2V
I
SW
= 10mA, T
A
= 25
°
C, V
IN
= 5V
V
SW
= 25V
I
LOAD
= 2mA
V
FB
= 1V
V
FB
= 1V
V
ADJ
= 1.5V
T
A
= +25
°
C
0.4
V
195
1.1
85
0.3
mA
μ
A
%
μ
s
Ns
V
μ
A
V
V
mV/
°
C
V
1
∞
400
1.5
1
6.0
1.6
150
0.9
1.6
`
-2
V
REF
V
FB
= 0.3V, V
LFB
< V
BRT
– 0.1V
V
FB
= 0.3V, V
LFB
< V
BRT
– 0.1V, V
LSHDN
< 0.4V
V
FB
= 0.3V, V
LFB
< V
BRT
– 0.1V, V
SHDN
< 0.4V
V
LSHDN
< 0.4V, V
SHDN
< 0.4V
1.187
1.21
120
60
60
0.35
1.236
200
135
135
0.5
Quiescent Current
I
Q
μ
A
E
L
E
C
T
R
I
C
A
L
S
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