SC440MLTRT Semtech, SC440MLTRT Datasheet - Page 6

• Manufacturer Part Number: SC440MLTRT
• Description: IC LED DRVR WHITE BCKLGT 24-MLPQ
• Manufacturer: Semtech
• Type: Backlight, White LEDr

Specifications of SC440MLTRT

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Frequency: 640kHz ~ 960kHz
• Voltage - Supply: 4.5 V ~ 21 V
• Voltage - Output: 40V
• Mounting Type: Surface Mount
• Package / Case: 24-MLPQ
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 91%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Other names: SC440MLTR

Typical Characteristics (continued)
© 2010 Semtech Corp.
30.5
29.5
28.5
0.88
0.86
0.84
0.82
31
30
29
0.9
5mA x 6 string load, 8 LEDs per string, L1= DR74-100, C2 = 2x10µF
6
5
4
3
2
1
0
-40
0
-40
VOUT Pull Down Current vs. Temperature
PWM Dimming Duty Cycle: IO = 5mA
LED Current Setting vs. Temperature
-20
-20
20
Fpwm = 200 Hz
0
0
NOT RECOMMENDED FOR NEW DESIGNS: SEE SC440A
VIN=4.5V
Temperature (°C)
Temperature (°C)
40
Duty Cycle %
20
20
RIOSET = 2kohm
60
40
Fpwm = 50kHz
40
VIN=21V
60
60
80
80
80
100
LED Current Source SCP Threshold vs. Temperature
0.912
0.908
0.906
0.904
0.902
0.898
0.896
0.894
30mA x 6 string load, 8 LEDs per string, L1 = DR74-100, C2 = 2x10µF
0.91
2.425
2.415
2.405
0.9
2.43
2.42
2.41
35
30
25
20
15
10
2.4
5
0
7
0
-40
PWM Dimming Duty Cycle: IO = 30mA
VOUT = 31V, D1 = 1N5819HW/Diodes Inc,
Efficiency vs. Input Voltage
-20
20
9
0
Temperature (°C)
Input Voltage (V)
40
Duty Cycle %
Fpwm = 200Hz
20
Fpwm = 50kHz
60
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11
40
80
60
SC440
80
13
100
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