LX1745CPW Microsemi Analog Mixed Signal Group, LX1745CPW Datasheet - Page 4

• Manufacturer Part Number: LX1745CPW
• Description: IC LED DRVR WT/CLR BCKLT 20TSSOP
• Manufacturer: Microsemi Analog Mixed Signal Group
• Type: Backlight, White LED, Color LEDr

Specifications of LX1745CPW

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 3
• 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: 20-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. 1.2, 2006-02-27
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
Current Sense Bias Current
Switch Peak Current
DRV Sink/Source Current
DRV On-Resistance
Maximum Switch On-Time
Minimum Switch Off-Time
OVP Threshold Voltage
Reference Voltage
LCD BIAS
Output Voltage Range
FBx Threshold Voltage
FBx Input Current
LCD Bias Shutdown Input Bias
Current
Peak Inductor Current
Internal NFET On-resistance
Switch Pin Leakage Current
Switch On-Time
Switch Off-Time
ADJx Input Voltage Range
ADJx Input Bias Current
ENTIRE REGULATOR
Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
Shutdown High Input Voltage
Shutdown Low Input Voltage
Quiescent Current
TM
Parameter
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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
Symbol
R
V
V
R
I
I
V
DRV(ON)
V
V
SHDNx
V
V
SHDN
V
I
I
DS(ON)
SHDNx
SHDNx
I
I
t
V
t
I
LEAK
V
I
t
t
ADJx
BRT
I
OFF
I
OFF
LFB
ADJx
LIM
I
BRT
CS
PK
ON
OVP
REF
OUT
ON
LFB
FB
κ
FB
Q
IN
1
Integrated Products Division
V
V
V
BRT = 100mv
0.0V ≤
R
R
V
V
V
V
V
T
I
V
V
V
Recommended Operating Range
T
V
V
V
V
0.4V
V
0.4V
V
0.4V
V
0.4V
IN
SHDNx = GND
SW
BRT
BRT
LFB
IN
CC
FB
FB
FB
A
SW
FB
FB
A
IN
IN
FBx
FBx
FBx
FBx
CS
CS
SHDN
= 3V, LSHDN = V
= +25°C
= +25°C
= 5V, V
= 10mA, T
= 2V
= 2V
®
= 1V
= 1V
= 1.4V
= 1V
= 1V
= 0kΩ
= 2kΩ
= 5V
= 25V
= 100mV
= 1.4V, V
= 1.4V, V
= 1.4V, V
= 1.4V, V
Microsemi
= 100mV
= 20mV
1
< 0.4V, V
SHDN ≤ VIN
DRV
Triple Output Boost – LED Driver / LCD Bias
Test Conditions
1
A
LFB
LFB
LFB
LFB
= 3V
= +25°C, V
SHDN
> V
> V
> V
> V
IN
BRT
BRT
BRT
BRT
2
,
< 0.4V, V
SHDN = V
– 0.1V
– 0.1V, V
– 0.1V, V
– 0.1V, V
IN
= 5V
P
1
RODUCTION
LSHDN
LSHDN
SHDN
SHDN
IN
,
SHDN = V
<
1
2
<
<
<
2
D
1.186
1.166
-100
-100
1.15
Min
200
150
0.9
1.6
1.6
ATASHEET
85
85
5
0
≤
IN
T
LX1745
A
1.190
1.21
1.21
0.35
0.35
≤
Typ
100
170
210
100
300
330
200
140
1.1
0.3
20
12
80
-2
4
70°C except where
1.234
1.214
1.26
Max
115
100
VIN
100
410
200
100
400
320
220
120
1.0
1.5
1.0
6.0
1.6
0.4
35
60
15
25
∞
∞
1
1
LX1745
mV/°C
Units
mV
mA
mA
mA
nA
nA
nA
μA
μS
nS
nA
nA
μA
μA
μA
μs
ns
Ω
Ω
V
V
V
V
V
V
V
V
V
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