LM3409MY-NOPB Datasheet, PDF (35/43 Pages) Texas Instruments – PFET Buck Controller for High Power LED Drivers

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DESIGN #6: HIGH CURRENT APPLICATION FOR 4 LEDS
R_UV2
R_UV1
V_ADJ
R_F2
C_F2
R_OFF
C_OFF
1
UVLO
2
IADJ
10
VIN
C_F
9
VCC
3
EN
LM3409
8
CSP
4
COFF
5
GND
DAP
7
CSN
6
PGATE
R_SNS
Q1
L1
LM3409, LM3409HV, LM3409-Q1
SNVS602J – MARCH 2009 – REVISED MAY 2013
V_IN = 24V
C_IN1
V_O = 14V
I_LED = 4.5A
D1 C_O
Design #6 Bill of Materials
*U2 could be replaced with a 500kΩ NTC thermistor connected from IADJ to GND.
Qty
Part ID
1
LM3409/LM3409Q
2
C_IN1
1
C_F
1
C_F2
1
C_OFF
1
C_O
1
Q1
1
D1
1
L1
1
R_F2
1
R_OFF
1
R_UV1
1
R_UV2
1
R_SNS
Part Value
Buck controller
10µF X7R 10% 50V
1.0µF X7R 10% 16V
0.1µF X7R 10% 16V
470pF X7R 10% 50V
1.0µF X7R 10% 50V
PMOS 30V 24A
Schottky 30V 5A
15 µH 20% 7.5A
1.0kΩ 1%
23.2kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.05Ω 1% 1W
Manufacturer
TI
TDK
TDK
TDK
TDK
MURATA
ST-MICRO
VISHAY
COILCRAFT
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
Part Number
LM3409MY/LM3409QMY
C5750X7R1H106K
C1608X7R1C105K
C1608X7R1C104K
C1608X7R1H471K
GRM32RR71H105KA01L
STD30PF03LT4
SSC53L-E3/57T
DO5022P-153ML
CRCW06031K00FKEA
CRCW060323K2FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R0500FEA
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