SC441TETRT Semtech, SC441TETRT Datasheet - Page 17

• 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

Evaluation Application Circuit
Evaluation Board Bill of Materials
© 2010 Semtech Corporation
Item
VIN
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
5
5
VOUT
C2
C2
10uF/25V
10uF/25V
C8
C8
4.7uF/50V
4.7uF/50V
C1, C14, C15,
R2, R3, R4, R7
R8, R10, R11,
Reference
C16, C17
R12, R13
R1, R14
C8, C9
D1
U1
C2
C4
C5
C6
R5
R6
R9
L1
C3
C3
N.P.
N.P.
C9
C9
4.7uF/50V
4.7uF/50V
D1
D1
NOT RECOMMENDED FOR NEW DESIGNS: SEE SC441A
L1
L1
6.8uH
6.8uH
Quantity
5
1
2
1
1
1
1
1
2
4
1
1
1
5
1
R8
R8
1R
1R
4
4
IO3
IO4
2.2uF/25V
2.2uF/25V
C4
C4
R10
R10
1R
1R
R12
R12
1R
1R
VOUT
6.3V ceramic capacitor, X7R
6.3V ceramic capacitor, X7R
50V ceramic capacitor, X7R
25V ceramic capacitor, X5R
50V ceramic capacitor, X5R
25V ceramic capacitor, X5R
40V, 3A Schottky diode
R3
R3
C1
C1
R7
R7
R5
R5
220K
220K
C14
C14
1nF
1nF
1% SMD resistor
5% SMD resistor
1% SMD resistor
1% SMD resistor
5% SMD resistor
5% SMD resistor
Description
6.8μH, 6.6A
Controller
1nF
1nF
10K
10K
10K
10K
11
12
13
14
15
16
17
18
19
20
C15
C15
1nF
1nF
3
3
FFLAG
VIN
OVPRTN
OVPIN
PGND
SW
SW
PGND
IO4
IO3
SC441
SC441
EDP TSSOP-20
U1
U1
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
IOGND
IOSET
COMP
AGND
DR125
VOUT
PWM
SMA
IO1
IO2
EN
SS
C16
C16
1nF
1nF
10
9
8
7
6
5
4
3
2
1
2
2
VOUT
RIOSET
RIOSET
0R
0R
R1
R1
R6
R6
100nF
100nF
C6
C6
C17
C17
1nF
1nF
VIN
RIOSET
100nF
SC441
6.8μH
4.7uF
2.2uF
10uF
47nF
B340
220K
Part
1.5K
1nF
10K
10K
10K
0R
1R
R2
R2
R14
R14
R11
R11
1R
1R
R13
R13
1R
1R
0R
0R
www.semtech.com
R4
R4
10K
10K
C7
C7
N.P.
N.P.
Copper or Any
Diodes or Any
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
Panasonic
SEMTECH
PWM
EN
IO1
IO2
Vendor
SC441
1.5K
1.5K
R9
R9
C5
C5
47n
47n
Any
Any
Any
Any
Any
Any
1
1
17
D
C
B
A