SC446TETRT Semtech, SC446TETRT Datasheet - Page 5

• Manufacturer Part Number: SC446TETRT
• Description: IC LED DRVR WHT BCKLGT TSSOP-16
• Manufacturer: Semtech
• Type: Backlight, White LEDr

Specifications of SC446TETRT

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 3
• Internal Driver: Yes
• Type - Primary: Backlight
• Frequency: 700kHz
• Voltage - Supply: 4.5 V ~ 27 V
• Voltage - Output: 36V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Current - Output / Channel: 100mA
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Other names: SC446TETR

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
o
VIN = 12V
C)
o
VIN = 12V
C)
o
C)
105
105
105
3.40
3.35
3.30
3.25
3.20
3.15
3.10
3.05
3.00
230
220
210
200
190
180
600
500
400
300
200
100
LED Current Source Saturation Voltage
0
-40
SW Saturation Voltage
-40
10
T
VIN Quiescent Supply Current
A
VIN = 4.5V
VIN = 12V
VIN = 27V
= 25
SW Saturation Voltage at 1A
20
30
o
LED Current (mA)
vs. Temperature
C
vs. Temperature
Temperature (
vs. LED Current
Temperature (
40
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50
25
25
60
o
C)
o
70
C)
SC446
80
90
105
105
100
5