Datasheet

IADJ
EN
CSN
LM3409HV
UVLO
V
IN
= 48V
I
LED
= 2A
max
VCC
COFF
GND
CSP
C
F
PGATE
C
OFF
R
UV2
R
UV1
DAP
VIN
V
O
= 35V
R
SNS
1
2
3
4
5 6
7
8
9
10
PWM
C
IN1
C
IN2
5V
R
EXT
C
EXT
R3
R2
R1
D1
L1
Q1
Q3
Q2
R
OFF
30085623
LM3409, LM3409HV, LM3409-Q1
SNVS602J –MARCH 2009–REVISED MAY 2013 www.ti.com
APPLICATIONS INFORMATION
DESIGN #3: EXTERNAL PARALLEL FET PWM DIMMING APPLICATION FOR 10 LEDS
Design #3 Bill of Materials
Qty Part ID Part Value Manufacturer Part Number
1 LM3409HV/LM3409QHV Buck controller TI LM3409HVMY/LM3409QHVM
Y
2 C
IN1
, C
IN2
2.2µF X7R 10% 100V MURATA GRM43ER72A225KA01L
1 C
F
1.0µF X7R 10% 16V TDK C1608X7R1C105K
1 C
OFF
470pF X7R 10% 50V TDK C1608X7R1H471K
1 C1 2200pF X7R 10% 50V MURATA GRM188R71H222KA01D
1 Q1 PMOS 100V 3.8A ZETEX ZXMP10A18KTC
1 Q2 CMOS 30V 2A FAIRCHILD FDC6333C
1 Q3 NMOS 100V 7.5A FAIRCHILD FDS3672
1 D1 Schottky 100V 3A VISHAY SS3H10-E3/57T
1 L1 15 µH 20% 4.2A TDK SLF12565T-150M4R2
2 R1, R2 1Ω 1% VISHAY CRCW06031R00FNEA
1 R3 10kΩ 1% VISHAY CRCW060310K0FKEA
1 R
EXT
100Ω 1% VISHAY CRCW0603100RFKEA
1 R
OFF
24.9kΩ 1% VISHAY CRCW060324K9FKEA
1 R
UV1
6.98kΩ 1% VISHAY CRCW06036K98FKEA
1 R
UV2
49.9kΩ 1% VISHAY CRCW060349K9FKEA
1 R
SNS
0.1Ω 1% 1W VISHAY WSL2512R1000FEA
32 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated
Product Folder Links: LM3409 LM3409HV LM3409-Q1