LM3409MYX National Semiconductor Corporation, LM3409MYX Datasheet - Page 23
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LM3409MYX
Manufacturer Part Number
LM3409MYX
Description
Pfet Buck Controller For High Power Led Drives
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM3409MYX.pdf
(30 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM3409MYX
Manufacturer:
NS/国半
Quantity:
20 000
8. INPUT UVLO
Solve for R
The closest 1% tolerance resistor is 49.9 kΩ therefore V
is:
Solve for R
Design #2 Bill of Materials
Qty
1
2
1
1
1
1
1
1
1
1
1
1
1
1
UV2
UV1
:
:
Part ID
LM3409
C
C
C
C
C
Q1
D1
L1
R
R
R
R
R
IN1
F
F2
OFF
O
F2
OFF
UV1
UV2
SNS
Part Value
Buck controller
4.7µF X7R 10% 50V
1.0µF X7R 10% 16V
0.1µF X7R 10% 16V
470pF X7R 10% 50V
2.2µF X7R 10% 50V
PMOS 70V 5.7A
Schottky 60V 5A
22 µH 20% 4.2A
1.0kΩ 1%
15.4kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.2Ω 1% 1W
HYS
23
The closest 1% tolerance resistor is 6.98 kΩ therefore V
ON
The chosen components from step 8 are:
9. IADJ CONNECTION METHOD
The IADJ pin is connected to an external voltage source and
varied from 0 – 1.24V to dim. An RC filter (R
C
10. PWM DIMMING METHOD
No PWM dimming is necessary.
F2
is:
= 0.1µF) is used as recommended.
Manufacturer
NSC
MURATA
TDK
TDK
TDK
MURATA
ZETEX
COMCHIP
TDK
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
Part Number
LM3409MY
GRM55ER71H475MA0
1L
C1608X7R1C105K
C1608X7R1C104K
C1608X7R1H471K
GRM43ER71H225MA0
1L
ZXMP7A17KTC
CDBC560-G
SLF12575T-220M4R0
CRCW06031K00FKEA
CRCW060315K4FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R2000FEA
F2
www.national.com
= 1 kΩ and
TURN-