LM3409MY-NOPB Datasheet, PDF (27/43 Pages) Texas Instruments – PFET Buck Controller for High Power LED Drivers

LM3409, LM3409HV, LM3409-Q1
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Design #1 Bill of Materials
Qty
Part ID
Part Value
1
LM3409HV/LM3409QHV
Buck controller
2
C_IN1, C_IN2
1
C_F
1
C_OFF
1
Q1
2.2µF X7R 10% 100V
1.0µF X7R 10% 16V
470pF X7R 10% 50V
PMOS 100V 3.8A
1
D1
Schottky 100V 3A
1
L1
15 µH 20% 4.2A
1
R_OFF
1
R_UV1
1
R_UV2
1
R_SNS
24.9kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.1Ω 1% 1W
Design Example #2
ANALOG DIMMING APPLICATION FOR 4 LEDS
SNVS602J – MARCH 2009 – REVISED MAY 2013
Manufacturer
TI
MURATA
TDK
TDK
ZETEX
VISHAY
TDK
VISHAY
VISHAY
VISHAY
VISHAY
Part Number
LM3409HVMY/LM3409QHVMY
GRM43ER72A225KA01L
C1608X7R1C105K
C1608X7R1H471K
ZXMP10A18KTC
SS3H10-E3/57T
SLF12565T-150M4R2
CRCW060324K9FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R1000FEA
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
V_IN = 24V
C_IN1
V_O = 14V
I_LED = 1A
D1 C_O
SPECIFICATIONS
f_SW = 500kHz
V_IN = 24V; V_IN-MAX = 42V
V_O = 14V
I_LED = 1A
Δi_L-PP = 450mA; Δi_LED-PP = 50mA
Δv_IN-PP = 1V
V_TURN-ON = 10V; V_HYS = 1.1V
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