Datasheet

IADJ
EN
CSN
LM3409
UVLO
V
IN
= 24V
I
LED
= 4.5A
VCC
COFF
GND
CSP
C
F
R
OFF
PGATE
C
OFF
R
UV2
R
UV1
DAP
VIN
V
O
= 14V
R
SNS
1
2
3
4
5 6
7
8
9
10
V
ADJ
C
IN1
C
O
D1
L1
Q1
R
F2
C
F2
LM3409, LM3409HV, LM3409-Q1
www.ti.com SNVS602J –MARCH 2009–REVISED MAY 2013
DESIGN #6: HIGH CURRENT APPLICATION FOR 4 LEDS
Design #6 Bill of Materials
*U2 could be replaced with a 500kΩ NTC thermistor connected from IADJ to GND.
Qty Part ID Part Value Manufacturer Part Number
1 LM3409/LM3409Q Buck controller TI LM3409MY/LM3409QMY
2 C
IN1
10µF X7R 10% 50V TDK C5750X7R1H106K
1 C
F
1.0µF X7R 10% 16V TDK C1608X7R1C105K
1 C
F2
0.1µF X7R 10% 16V TDK C1608X7R1C104K
1 C
OFF
470pF X7R 10% 50V TDK C1608X7R1H471K
1 C
O
1.0µF X7R 10% 50V MURATA GRM32RR71H105KA01L
1 Q1 PMOS 30V 24A ST-MICRO STD30PF03LT4
1 D1 Schottky 30V 5A VISHAY SSC53L-E3/57T
1 L1 15 µH 20% 7.5A COILCRAFT DO5022P-153ML
1 R
F2
1.0kΩ 1% VISHAY CRCW06031K00FKEA
1 R
OFF
23.2kΩ 1% VISHAY CRCW060323K2FKEA
1 R
UV1
6.98kΩ 1% VISHAY CRCW06036K98FKEA
1 R
UV2
49.9kΩ 1% VISHAY CRCW060349K9FKEA
1 R
SNS
0.05Ω 1% 1W VISHAY WSL2512R0500FEA
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