sc441c Semtech Corporation, sc441c Datasheet - Page 5

• Manufacturer Part Number: sc441c
• Description: High Efficiency Integrated Driver For 4-strings Of 150ma Leds
• Manufacturer: Semtech Corporation

Typical Characteristics
© 2010 Semtech Corporation
Comp current source & sink
4.24
4.23
4.22
4.21
4.20
4.19
6.5
6.0
5.5
5.0
4.5
4.0
0.820
0.800
0.780
0.760
0.740
0.720
0.700
-40
Vout Pull Down Current
-40
-40
UVLO Threshold vs. Temperature
VOUT Pull Down Current Source
VOUT = VIN + 3V
COMP SINK / SOURCE Current
vs. Temperature
Temperature (
vs. Temperature
Temperature (
Temperature (
VIN = 12V
25
25
25
SOURCE
SINK
VIN = 27V
o
o
o
VIN = 12V
C)
C)
C)
VIN = 4.5V
105
105
105
LED Current Source SCP Threshold
285
275
265
255
245
235
6.0
5.0
4.0
3.0
2.0
1.0
2.36
2.35
2.34
2.33
2.32
2.31
SS current source & sink
-40
LED Current Source SCP Threshold
-40
-40
UVLO Hysteresis vs. Temperature
SS SINK / SOURCE Current
vs. Temperature
vs. Temperature
Temperature (
Temperature (
Temperature (
25
25
25
SOURCE
SINK
AVG current(mA)
IO1 current(mA)
IO2 current(mA)
IO3 current(mA)
IO4 current(mA)
o
VIN = 12V
C)
o
VIN = 12V
C)
o
C)
105
105
105
148.12
148.66
147.94
143.78
147.13
154.0
153.0
152.0
151.0
150.0
149.0
148.0
147.0
146.0
-40
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
230
220
210
200
190
180
Average LED Current Source Setting
Temperature
-40
-40
SW Saturation Voltage
-40
VIN Quiescent Supply Current
VIN = 4.5V
VIN = 12V
VIN = 27V
149.35
150.89
150.98
147.51
149.68
SW Saturation Voltage at 1A
25
vs. Temperature
vs. Temperature
vs. Temperature
Temperature (
Temperature (
Temperature (
151.91
153.05
153.52
151.44
152.48
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105
25
25
25
VIN = 12V
R
SC441C
IOSET
o
o
C)
o
C)
C)
= 1.74kW
105
105
105
5