LM3409MY-NOPB Datasheet, PDF (33/43 Pages) Texas Instruments – PFET Buck Controller for High Power LED Drivers

LM3409, LM3409HV, LM3409-Q1
www.ti.com
SNVS602J – MARCH 2009 – REVISED MAY 2013
DESIGN #4: SINGLE POTENTIOMETER ANALOG DIMMING APPLICATION FOR 6 LEDS
R_UV2
R_UV1
R_ADJ
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
C_IN1 C_IN2
V_IN = 36V
V_O = 24V
I_LED = 700 mA
maximum
D1
C_O
Design #4 Bill of Materials
Qty
Part ID
1
LM3409/LM3409Q
2
C_IN1, C_IN2
1
C_F
1
C_F2
1
C_OFF
1
C_O
1
Q1
1
D1
1
L1
1
R_OFF
1
R_UV1
1
R_UV2
1
R_SNS
1
R_ADJ
Part Value
Buck controller
2.2µF X7R 10% 50V
1.0µF X7R 10% 16V
0.1µF X7R 10% 16V
470pF X7R 10% 50V
1.0µF X7R 10% 50V
PMOS 60V 3A
Schottky 60V 2A
68 µH 20% 2A
25.5kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.3Ω 1% 1W
250kΩ potentiometer
Manufacturer
TI
MURATA
TDK
TDK
TDK
MURATA
ZETEX
ST-MICRO
TDK
VISHAY
VISHAY
VISHAY
VISHAY
BOURNS
Part Number
LM3409MY/LM3409QMY
GRM43ER71H225MA01L
C1608X7R1C105K
C1608X7R1C104K
C1608X7R1H471K
GRM32RR71H105KA01L
ZXMP6A17GTA
STPS2L60A
SLF12565T-680M2R0
CRCW060325K5FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R3000FEA
3352P-1-254
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