SC446TETRT Semtech, SC446TETRT Datasheet - Page 8

• 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
(1V/DIV)
IO1
(10V/DIV)
VOUT
(10V/DIV)
VSW
(20V/DIV)
VOUT
(20V/DIV)
IO1
(1V/DIV)
IO2
(10V/DIV)
PWM
(5V/DIV)
SW
(20V/DIV)
© 2010 Semtech Corporation
Typical Characteristics (continued)
VIN
(10V/DIV)
VSS
(1.5V/DIV)
VIN
(10V/DIV)
Conditions: 12Vin, 36Vout / 100mA x 3 LED strings,
Conditions: 12Vin, 36Vout / 100mA x 3 LED strings,
Conditions: 12Vin, 36Vout / 100mA x 3 LED strings
200Hz PWM Dimming, 0.2% Duty Cycle
IO1 LED String is open circuit
LED Open Circuit Protection
Over Temperature Protection
Time (100mS/DIV)
Time (50mS/DIV)
PWM Dimming
Time (5mS/DIV)
IO1
(1V/DIV)
VOUT
(1V/DIV)
IO1
(10V/DIV)
VOUT
(10V/DIV)
IO2
(1V/DIV)
VOUT
(1V/DIV)
SW
(20V/DIV)
PWM
(5V/DIV)
SW
(20V/DIV)
VIN
(10V/DIV)
IO1
(10V/DIV)
VIN
(10V/DIV)
Conditions: 12Vin to 19Vin, 36Vout / 100mA x 3 LED strings
Conditions: 12Vin, 36Vout / 100mA x 3 LED strings,
Conditions: 12V, 36Vout / 100mA x 3 LED strings,
200Hz PWM Dimming, 50% Duty Cycle
IO1 has one LED short circuit
LED Short Circuit Protection
Time (10mS/DIV)
PWM Dimming
Adaptor Plug-in
Time (50uS/DIV)
Time (5mS/DIV)
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