lx1996 Microsemi Corporation, lx1996 Datasheet - Page 8

• Manufacturer Part Number: lx1996
• Description: Multi-string Led Back-light Controller
• Manufacturer: Microsemi Corporation

Copyright © 2007
Rev. 1.0, 2007-12-14
S U P P L Y C U R R E N T
A N A L O G I N P U T
100%
100
90
80
70
60
50
40
30
20
10
90%
80%
70%
60%
50%
40%
0
0.25
1.8
1.6
1.4
1.2
S Y S T E M E F F I C I E N C Y
0
2
1
TM
6
0.4
0.5
8
0.598
20
Quiescent current Vs input voltage
System Efficiency Vs Output Load
0.75
10 12 14 16 18 20 22 24 26 28
0.795
PWM output Vs Analog input
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Analog Dimming Mode
Efficiency Vs Output load
Analog dim m ing m ode
Typical Characteristics @ 25°C (Refer to Figure 1)
D I M M I N G
1
( NO LOAD)
40
0.99
Total LED current (m A)
V S
Analog input (V)
1.25
1.2
V S
I N T E R N A L D I G I T A L
.
Vin (V)
60
1.379
1.5
I N P U T V O L T A G E
1.59
1.75
80
V S
1.78
L O A D
2
1.97
Analog Mixed Signal Group
100
2.25
2.2
6V-Eff
12V-Ef f
18V-Ef f
Microsemi
®
2.36
120
2.5
Multi-string LED Back-light Controller
S L E E P C U R R E N T
-0.1%
-0.2%
-0.3%
-0.4%
-0.5%
0.5%
0.4%
0.3%
0.2%
0.1%
0.0%
11
10
24
20
16
12
8
4
0
9
8
7
6
5
4
3
3
S T R I N G C U R R E N T M A T C H I N G
0
6
2
LED String Current Matching Vs. Input Voltage
A N A L O G I N P U T
0.2
P
6
8
Sleep current Vs input voltage
RODUCTION
0.4
10 12 14 16 18 20 22 24 26 28
LED current Vs Analog input
Vs
9
4.9
Input Voltage (V)
0.6
Input Voltage
I
SET
0.8
12
Analog input (V)
= 20.04mA
D
V S
1
ATASHEET
Vin (V)
10.4
15
I N P U T V O L T A G E
1.2
V S
18
1.4
I
C S ( X )
15.6
1.6
21
1.8
LX1996
Variation ILED1
Variation ILED2
Variation ILED3
Variation ILED4
Variation ILED5
Variation ILED6
2
20.1
2.2
Page 8