LM3409 Datasheet, PDF (27/30 Pages) National Semiconductor (TI) – PFET Buck Controller for High Power LED Drives

DESIGN #6: HIGH CURRENT APPLICATION FOR 4 LEDS
Design #6 Bill of Materials
Qty
Part ID
Part Value
Manufacturer
1
LM3409
Buck controller
NSC
2
C_IN1
10µF X7R 10% 50V TDK
1
C_F
1.0µF X7R 10% 16V TDK
1
C_F2
0.1µF X7R 10% 16V TDK
1
C_OFF
470pF X7R 10% 50V TDK
1
C_O
1.0µF X7R 10% 50V MURATA
1
Q1
PMOS 30V 24A
ST-MICRO
1
D1
Schottky 30V 5A
VISHAY
1
L1
15 µH 20% 7.5A
COILCRAFT
1
R_F2
1.0kΩ 1%
VISHAY
1
R_OFF
23.2kΩ 1%
VISHAY
1
R_UV1
6.98kΩ 1%
VISHAY
1
R_UV2
49.9kΩ 1%
VISHAY
1
R_SNS
0.05Ω 1% 1W
VISHAY
*U2 could be replaced with a 500kΩ NTC thermistor connected from IADJ to GND.
300856f4
Part Number
LM3409MY
C5750X7R1H106K
C1608X7R1C105K
C1608X7R1C104K
C1608X7R1H471K
GRM32RR71H105KA0
1L
STD30PF03LT4
SSC53L-E3/57T
DO5022P-153ML
CRCW06031K00FKEA
CRCW060323K2FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R0500FEA
27
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