LM3409MY-NOPB Datasheet, PDF (34/43 Pages) Texas Instruments – PFET Buck Controller for High Power LED Drivers

LM3409, LM3409HV, LM3409-Q1
SNVS602J – MARCH 2009 – REVISED MAY 2013
DESIGN #5: 75°C THERMAL FOLDBACK APPLICATION FOR 16 LEDS
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R_UV2
R_UV1
U1
C_F2
R_OFF
C_OFF
1
UVLO
2
IADJ
10
VIN
C_F
9
VCC
3
EN
LM3409HV
8
CSP
4
COFF
5
GND
DAP
7
CSN
6
PGATE
R_SNS
Q1
L1
C_IN1 C_IN2
V_IN = 65V
V_O = 56V
I_LED = 3A
maximum
D1
Design #5 Bill of Materials
*U2 could be replaced with a 500kΩ NTC thermistor connected from IADJ to GND.
Qty
Part ID
1 LM3409HV/LM3409QHV
1
U1
2
C_IN1, C_IN2
1
C_F
1
C_F2
1
C_OFF
1
Q1
1
D1
1
L1
1
R_OFF
1
R_UV1
1
R_UV2
1
R_SNS
Part Value
Buck controller
Analog Temperature Sensor
2.2µF X7R 10% 100V
1.0µF X7R 10% 16V
0.1µF X7R 10% 16V
470pF X7R 10% 50V
PMOS 100V 3.8A
Schottky 100V 3A
15 µH 20% 4.7A
24.9kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.07Ω 1% 1W
Manufacturer
TI
TI
MURATA
TDK
TDK
TDK
ZETEX
COMCHIP
TDK
VISHAY
VISHAY
VISHAY
VISHAY
Part Number
LM3409HVMY/LM3409QHVMY
LM94022
GRM43ER72A225KA01L
C1608X7R1C105K
C1608X7R1C104K
C1608X7R1H471K
ZXMP10A18KTC
SS3H10-E3/57T
SLF12575T-150M4R7
CRCW060324K9FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R0700FEA
34
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