Texas Instruments LM3409 Demonstration Board LM3409EVAL/NOPB LM3409EVAL/NOPB Datenbogen
Produktcode
LM3409EVAL/NOPB
IADJ
EN
CSN
LM3409
UVLO
V
IN
= 24V
I
LED
= 1A
VCC
COFF
GND
CSP
C
F
R
OFF
PGATE
C
OFF
R
UV2
R
UV1
DAP
VIN
V
O
= 14V
R
SNS
1
2
3
4
5
6
7
8
9
10
V
ADJ
C
IN1
C
O
D1
L1
Q1
R
F2
C
F2
SNVS602J – MARCH 2009 – REVISED MAY 2013
Design #1 Bill of Materials
Qty
Part ID
Part Value
Manufacturer
Part Number
1
LM3409HV/LM3409QHV
Buck controller
TI
LM3409HVMY/LM3409QHVMY
2
C
IN1
, C
IN2
2.2µF X7R 10% 100V
MURATA
GRM43ER72A225KA01L
1
C
F
1.0µF X7R 10% 16V
TDK
C1608X7R1C105K
1
C
OFF
470pF X7R 10% 50V
TDK
C1608X7R1H471K
1
Q1
PMOS 100V 3.8A
ZETEX
ZXMP10A18KTC
1
D1
Schottky 100V 3A
VISHAY
SS3H10-E3/57T
1
L1
15 µH 20% 4.2A
TDK
SLF12565T-150M4R2
1
R
OFF
24.9k
Ω
1%
VISHAY
CRCW060324K9FKEA
1
R
UV1
6.98k
Ω
1%
VISHAY
CRCW06036K98FKEA
1
R
UV2
49.9k
Ω
1%
VISHAY
CRCW060349K9FKEA
1
R
SNS
0.1
Ω
1% 1W
VISHAY
WSL2512R1000FEA
Design Example #2
ANALOG DIMMING APPLICATION FOR 4 LEDS
SPECIFICATIONS
f
SW
= 500kHz
V
IN
= 24V; V
IN-MAX
= 42V
V
O
= 14V
I
LED
= 1A
Δ
i
L-PP
= 450mA;
Δ
i
LED-PP
= 50mA
Δ
v
IN-PP
= 1V
V
TURN-ON
= 10V; V
HYS
= 1.1V
Copyright © 2009–2013, Texas Instruments Incorporated
27
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