SC446TETRT Semtech, SC446TETRT Datasheet - Page 4

• 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

Electrical Characteristics (continued)
Notes:
(1) Guaranteed by design.
(2) For achievable PWM dimming minimum pulse-width in applications, see the corresponding curves in Typical Characteristics.
© 2010 Semtech Corporation
Parameter
Control Signals
EN, PWM High Voltage
EN, PWM Low Voltage
EN, PWM Leakage Current
PWM Dimming Frequency
PWM Dimming Minimum Duty Cycle
PWM Dimming Minimum Pulse-Width
PWM Dimming Minimum Off Time
FFLAG Voltage
SS Source Current
SS Sink Current
SS Switching Threshold
SS End Value
Over-Voltage Protection
OVPIN Threshold
OVPIN Leakage Current
OVPRTN Saturation Voltage
OVPRTN Leakage Current
VOUT Internal Pull-down Current Source
VOUT Leakage Current
Current Source (IO1 ~IO3 )
Current Accuracy
Current Matching
Maximum LED Current
LED Short-Circuit Protection
Leakage Current
Overshoot Protection Threshold
Overshoot Protection Hysteresis
Over-Temperature Protection
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
(1)
(2)
Any of I
V
V
D
T
V
EN_H,
Symbol
EN_L,
V
I
MIN_Dimming
I
V
MIN_Dimming
I
F
SS_Switching
VOUT
I
SS_SOURCE
V
T
V
V
I
EN,
I
I
O1
IO1
V
T
OVPIN_TH
Dimming
I
IO_LEAK
SS_SINK
OVPRTN
I
MIN_Off
OVPRTN
T
SS_END
OVPIN
OMAX
I
IO_SCP
OTP_H
FFLAG
~ I
OVP
~V
OTP
V
V
I
_
PWM
O1
PWM_H
PWM_L
Leak
O3
IO3
~ I
O3
V
EN = 0, V
SS
T
T
V
J
J
IN
= 2V at OVP or OTP
F
I
= 25 °C, V
= 25 °C, V
OVPIN - AGND
V
OVPRTN
V
Dimming
= 12V, T
V
I
Conditions
V
OUT
FFLAG
EN
V
OVPRTN
T
T
V
OVPIN
V
, V
OUT
J
J
IN
SS
= V
= 25 °C
= 25 °C
IO1
PWM
= 100 µA
= 12V
= 2 mA
= 40V
= 200Hz
= 0V
= 20V
= 20V
IN
~ V
J
IO1
IO1
= 5V
= 25 °C
+ 3V
IO3
~ V
~ V
= V
IO3
IO3
IN
0.9065
0.963
Min
1.43
150
0.5
2.2
50
93
2
+/- 2
0.25
1.52
2.35
1.07
1.07
Typ
200
100
100
150
0.1
0.2
4.5
0.7
2.5
0.1
0.1
0.9
0.1
0.1
60
30
1
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1.2305
1.177
Max
0.85
1.58
+/-3
2.55
50k
300
107
0.4
1
5
1
1
SC446
Units
mV
mA
mA
mA
mV
µA
Hz
µA
µA
µA
µA
µA
µs
ns
°C
°C
%
%
V
V
V
V
V
V
V
V
V
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