SC446TETRT Semtech, SC446TETRT Datasheet - Page 17

• 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

D
C
B
A
Evaluation Application Circuit
Evaluation Board Bill of Materials
© 2010 Semtech Corporation
Item
VIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
VOUT
C2
C2
10uF/25V
10uF/25V
C8
C8
4.7uF/50V
4.7uF/50V
R8, R10, R12, R13
5
5
C14, C15, C16
R2, R3, R4, R7
Reference
R1, R14
C8, C9
C3
C3
N.P.
N.P.
C9
C9
4.7uF/50V
4.7uF/50V
C1
C2
C4
C5
C6
D1
U1
L1
R5
R6
R9
D1
D1
L1
L1
6.8uH
6.8uH
Quantity
R8
R8
1R
1R
C4
C4
1
3
1
2
1
1
1
1
1
2
4
1
1
1
4
1
4
4
IO3
IO2
VOUT
6.3V ceramic capacitor, X7R
6.3V ceramic capacitor, X7R
25V ceramic capacitor, X7R
50V ceramic capacitor, X7R
25V ceramic capacitor, X5R
50V ceramic capacitor, X5R
25V ceramic capacitor, X5R
R5
R5
243K
243K
R10
R10
1R
1R
R12
R12
1R
1R
60V, 2A Schottky diode
C1 4.7nF
C1 4.7nF
R7 10K
R7 10K
1% SMD resistor
5% SMD resistor
1% SMD resistor
1% SMD resistor
5% SMD resistor
5% SMD resistor
C14
C14
1nF
1nF
6.8μH, 3.67A
Description
Controller
C15
C15
1nF
1nF
3
3
10
11
12
13
14
15
16
9
U1
U1
VIN
OVPRTN
OVPIN
PGND
SW
PGND
IO3
IO2
SC446
SC446
EDP TSSOP-16
SM_0603
SM_0603
SM_1206
SM_1206
SM_0805
SM_0603
SM_0603
SM_0603
SM_0603
SM_0603
SM_0603
SM_0603
SM_0603
Package
DR74
SMA
IOSET
COMP
VOUT
AGND
PWM
IO1
EN
SS
2
2
8
7
6
5
4
3
2
1
C16
C16
1nF
1nF
VOUT
RIOSET
RIOSET
R6
R6
RIOSET
0R
0R
R1
R1
B260A
100nF
SC446
6.8μH
4.7nF
4.7uF
2.2uF
10uF
22nF
243K
Part
100nF
100nF
1.5K
C6
C6
1nF
10K
0R
1R
VIN
www.semtech.com
10K
10K
R2
R2
R14
R14
R13
R13
1R
1R
0R
0R
Copper or Any
Diodes or Any
C7
C7
N.P.
N.P.
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
SEMTECH
Vendor
SC446
R4
R4
10K
10K
Any
Any
Any
Any
Any
Any
PWM
EN
1
R9
R9
1.5K
1.5K
C5
C5
22nF
22nF
1
IO1
17
D
C
B
A