LX1744CPW Microsemi Analog Mixed Signal Group, LX1744CPW Datasheet - Page 4

• Manufacturer Part Number: LX1744CPW
• Description: IC LED DRVR WT/CLR BCKLT 14TSSOP
• Manufacturer: Microsemi Analog Mixed Signal Group
• Type: Backlight, White LED, Color LEDr

Specifications of LX1744CPW

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 2
• Internal Driver: Both
• Type - Primary: Backlight
• Type - Secondary: Color, White LED
• Voltage - Supply: 1.6 V ~ 6 V
• Voltage - Output: 25V
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 100mA
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency: -

Copyright © 2000
Rev. 1.1b, 2005-03-01
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C
otherwise noted and the following test conditions: V
LED DRIVER
LFB Threshold Voltage
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
Switch Peak Current
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
Quiescent Current
I N T E G R A T E D
Parameter
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P R O D U C T S
Symbol
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
V
V
R
V
V
I
I
V
V
V
V
V
SHDN
I
V
t
SHDN
DS(ON)
t
SHDN
SHDN
V
LEAK
I
t
SHDN
SHDN
I
t
V
I
I
OFF
OFF
ADJ
ON
OVP
OUT
LIM
ON
I
LFB
BRT
CS
η
PK
η
ADJ
REF
FB
Q
IN
1
1
1
IN
Integrated Products Division
V
V
V
BRT = V
0.0V ≤ LSHDN ≤ V
V
V
I
V
V
V
V
R
R
V
V
V
I
V
I
V
V
V
T
V
V
V
V
SHDN = GND
LOAD
SW
LOAD
= 3V, I
A
BRT
BRT
LFB
IN
IN
IN
CC
FB
FB
CS
CS
FB
IN
IN
SW
FB
FB
ADJ
FB
FB
FB
LSHDN
= +25°C
= 2V
= 2V
= 5V, DRV = 3V
= 2V
= 2V
= 10mA, T
= 1V
= 1V
= 1.4V
= 1V
= 1V
= 0.3V, V
= 0.3V, V
= 0.3V, V
= 5V
= 0Ω
= 2kΩ
= 25V
Microsemi
= 100mV
= 1.5V
= 100mV
= 20mV
= 2mA
= 2mA
< 0.4V, V
LED
REF
= 20mA,
Dual Output Boost – LED Driver / LCD Bias
LFB
LFB
LFB
Test Conditions
A
= 25°C, V
< V
< V
< V
SHDN
IN
BRT
BRT
BRT
SHDN = V
< 0.4V
– 0.1V
– 0.1V, V
– 0.1V, V
IN
1
= 5V
P
RODUCTION
IN
LSHDN
SHDN
,
SHDN = V
< 0.4V
< 0.4V
2
D
ATASHEET
IN
1.172
1.187
-100
-100
1.15
Min
200
150
≤
0.0
1.6
1.6
0.9
1.6
95
85
5
0
T
A
≤
LX1744
1.21V
1.196
1.21
0.35
Typ
100
100
300
170
210
195
120
1.1
0.3
70°C except where
20
90
12
85
60
60
-2
4
1.220
1.236
Max
1.26
115
100
100
410
200
100
400
200
135
135
0.4
0.4
1.5
6.0
1.6
0.5
V
35
60
15
25
∞
∞
1
1
LX1744
IN
mV/°C
Units
mV
mA
mA
mA
nA
nA
nA
µA
µS
nS
nA
nA
µA
Ns
µA
µA
µs
%
%
Ω
Ω
V
V
V
V
V
V
V
V
V
V
V
V
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