SC4509SKTRT Semtech, SC4509SKTRT Datasheet - Page 11

• Manufacturer Part Number: SC4509SKTRT
• Description: IC LED DRVR WT/OLED BCKLT SOT236
• Manufacturer: Semtech
• Type: Backlight, OLED, White LEDr

Specifications of SC4509SKTRT

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Frequency: 1MHz ~ 1.4MHz
• Voltage - Supply: 2.7 V ~ 10 V
• Voltage - Output: 20V
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 81%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SC4509SKTR

© 2007 Semtech Corp.
POWER MANAGEMENT
Typical Characteristics (Cont.)
35.0%
30.0%
25.0%
20.0%
15.0%
10.0%
5.0%
0.0%
Input Voltage vs. LED Current, V
2.7
2.9
V
ILED = 20mA
Switch Complementary Duty Cycle vs.
IN
3.1
= 3.6V; I
3.3
Switching Waveform
3.5
LED
= 20mA; V
3.7
VIN (V)
3.9
4.1
OUT
OUT
= 16V (4 LEDs)
4.3
= 16V, (4 LED)
ILED = 30mA
4.5
4.7
4.9
5.1
5.3
11
V
IN
= 3.6V; I
LED
Startup Current
= 30mA; V
OUT
= 16V (4 LEDs)
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