SC446TETRT Semtech, SC446TETRT Datasheet - Page 3

• 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

Absolute Maximum Ratings
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES-
(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
(2) Tested according to JEDEC standard JESD22-A114-B.
Electrical Characteristics
Unless otherwise specified: V
© 2010 Semtech Corporation
V
Maximum Output Power ………………………………
SW, OVPIN, OVPRTN, VOUT, IO1~IO3 Voltage …… -0.3 to 40V
IOSET Voltage ……………………………………… -0.3 to 2V
SS, COMP Voltage …………………………………
EN, PWM, Voltage …………………………… -0.3 to V
PGND to AGND ………………………………………
Peak IR Reflow Temperature …………………………… 260°C
ESD Protection Level
Parameter
Input Supply
Under-Voltage Lockout Threshold
UVLO Hysteresis
V
V
Oscillator
Switching Frequency
Internal Power Switcher
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Maximum Duty Cycle
Minimum Duty Cycle
Minimum On-Time
Compensation
Sourcing Current
Sinking Current
IN
IN
IN
Pin: Supply Voltage …………………………… -0.3 to 30V
Quiescent Supply Current
Supply Current in Shutdown
(1)
(2)
………………………………
IN
=12V, -40°C < T
A
= T
UVLO-TH
Symbol
UVLO-H
I
EA_SOURCE
T
I
J
I
EA_SINK
D
S_LEAK
D
ON_MIN
I
V
< 105°C, R
I
IN_Q
I
IN_S
F
SW
MAX
SAT
MIN
S
-0.3 to 4V
IOSET
IN
± 0.3V
3.5kV
+0.3V
=2.61kW.
22W
EN / PWM = low
No switching
Conditions
V
V
Recommended Operating Conditions
Thermal Information
COMP
V
I
Input Voltage Range ……………………………… 4.5V~27V
Maximum Output Voltage ……………………………… 36V
Maximum LED Current ……………………………… 100mA
Junction to Ambient
Maximum Junction Temperature ……………………… 150°C
Storage Temperature ………………………… -65 to +150°C
Lead Temperature (Soldering) 10 sec ………………… 260°C
COMP
SW
IN
rising
= 1A
= 0.5V
= 2V
(1)
……………………………… 39°C/W
Min
0.56
2.5
88
3.32
Typ
250
200
100
4.3
0.7
0.1
93
3
5
6
www.semtech.com
Max
4.45
0.84
350
1
1
0
SC446
Units
MHz
mA
mV
mV
µA
µA
µA
µA
ns
%
%
V
A
3