LM3409MY-NOPB Datasheet, PDF (32/43 Pages) Texas Instruments – PFET Buck Controller for High Power LED Drivers

LM3409, LM3409HV, LM3409-Q1
SNVS602J – MARCH 2009 – REVISED MAY 2013
APPLICATIONS INFORMATION
www.ti.com
DESIGN #3: EXTERNAL PARALLEL FET PWM DIMMING APPLICATION FOR 10 LEDS
R_UV2
R_EXT
5V
R3
R2
Q2
PWM
R_UV1
1
UVLO
10
VIN
2
IADJ
9
VCC
C_EXT
C_OFF
3
EN
LM3409HV
8
CSP
4
COFF
5
GND
DAP
7
CSN
6
PGATE
R_OFF
R1
C_F
R_SNS
Q1
L1
D1
30085623
C_IN1 C_IN2
Q3
V_IN = 48V
V_O = 35V
I_LED = 2A
max
Design #3 Bill of Materials
Qty
Part ID
1 LM3409HV/LM3409QHV
2
C_IN1, C_IN2
1
C_F
1
C_OFF
1
C1
1
Q1
1
Q2
1
Q3
1
D1
1
L1
2
R1, R2
1
R3
1
R_EXT
1
R_OFF
1
R_UV1
1
R_UV2
1
R_SNS
Part Value
Buck controller
2.2µF X7R 10% 100V
1.0µF X7R 10% 16V
470pF X7R 10% 50V
2200pF X7R 10% 50V
PMOS 100V 3.8A
CMOS 30V 2A
NMOS 100V 7.5A
Schottky 100V 3A
15 µH 20% 4.2A
1Ω 1%
10kΩ 1%
100Ω 1%
24.9kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.1Ω 1% 1W
Manufacturer
TI
MURATA
TDK
TDK
MURATA
ZETEX
FAIRCHILD
FAIRCHILD
VISHAY
TDK
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
Part Number
LM3409HVMY/LM3409QHVM
Y
GRM43ER72A225KA01L
C1608X7R1C105K
C1608X7R1H471K
GRM188R71H222KA01D
ZXMP10A18KTC
FDC6333C
FDS3672
SS3H10-E3/57T
SLF12565T-150M4R2
CRCW06031R00FNEA
CRCW060310K0FKEA
CRCW0603100RFKEA
CRCW060324K9FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R1000FEA
32
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