SC446TETRT Semtech, SC446TETRT Datasheet - Page 7

• 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

VOUT
(15V/DIV)
VSW
(20V/DIV)
VOUT
(100mV/DIV)
VSW
(12V/DIV)
VOUT
(10V/DIV)
VSW
(20V/DIV)
© 2010 Semtech Corporation
VIN
(12V/DIV)
VSS
(1.2V/DIV)
VIN
(12V/DIV)
PWM
(5V/DIV)
IO1
(10V/DIV)
Typical Characteristics (continued)
Conditions: 12Vin, 36Vout / 100mA x 3 LED strings,
Conditions: 20Vin, 36Vout / 100mA x 3 LED strings
Conditions: 12Vin, 36Vout / 100mA x 3 LED strings
200Hz PWM Dimming, 50% Duty Cycle
Main Power Switching
Start up by PWM
Time (10mS/DIV)
Time (5mS/DIV)
Time (1uS/DIV)
Start up
VOUT
(15V/DIV)
VSW
(20V/DIV)
VOUT
(100mV/DIV)
VSW
(12V/DIV)
VIN
(12V/DIV)
VSS
(1.2V/DIV)
VIN
(12V/DIV)
Conditions: 20Vin, 36Vout / 100mA x 3 LED strings
Conditions: 20V, 36Vout / 100mA x 3 LED strings
Main Power Switching
Time (2S/DIV)
Time (1uS/DIV)
Shut Down
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