SC441TETRT Semtech, SC441TETRT Datasheet - Page 8

• Manufacturer Part Number: SC441TETRT
• Description: IC LED DRIVR WHT BCKLGT 20-TSSOP
• Manufacturer: Semtech
• Type: Backlight, White LEDr

Specifications of SC441TETRT

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Frequency: 560kHz ~ 840kHz
• Voltage - Supply: 4.5 V ~ 21 V
• Voltage - Output: 36V
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Current - Output / Channel: 150mA
• Internal Switch(s): Yes
• Efficiency: 90%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Other names: SC441TETR

© 2010 Semtech Corporation
Typical Characteristics (continued)
VIN
(5V/DIV)
VOUT
(20V/DIV)
IO1
(10V/DIV)
IO2
(1V/DIV)
VSS
(2V/DIV)
VSW
(20V/DIV)
VOUT
(20V/DIV)
VIN = 12V
Conditions: VIN = 12V, IO2 LED String is open circuit,
Output = 36V / 150mA x 3 LED strings
Output = 36V / 150mA x 4 LED strings
LED Open Circuit Protection
NOT RECOMMENDED FOR NEW DESIGNS: SEE SC441A
OTP and OTP Recovery
Conditions: VIN = 12V,
Time (10mS/DIV)
Time (40mS/DIV)
VIN = 12V
PWM
(2V/DIV)
SW
(20V/DIV)
IO1
(5V/DIV)
VIN
(10V/DIV)
VOUT
(20V/DIV)
IO2
(1V/DIV)
IO1
(5V/DIV)
Conditions: VIN = 12V, IO1 has one LED short circuit,
Output = 36V / 50mA x 4 LED strings
Output = 36V / 150mA x 4 LED strings
LED Short Circuit Protection
Conditions: VIN = 12V,
Time (10mS/DIV)
Time (10mS/DIV)
PWM Dimming
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SC441
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