LM3409HVMYX/NOPB National Semiconductor, LM3409HVMYX/NOPB Datasheet - Page 20
![IC LED DRIVR HIGH BRIGHT 10-MSOP](/photos/7/37/73786/pkg_muc10a_sml.jpg)
LM3409HVMYX/NOPB
Manufacturer Part Number
LM3409HVMYX/NOPB
Description
IC LED DRIVR HIGH BRIGHT 10-MSOP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
HBLED Driverr
Datasheet
1.LM3409MYNOPB.pdf
(30 pages)
Specifications of LM3409HVMYX/NOPB
Constant Current
Yes
Topology
PWM, Step-Down (Buck)
Number Of Outputs
1
Internal Driver
No
Type - Primary
Automotive
Type - Secondary
High Brightness LED (HBLED)
Voltage - Supply
6 V ~ 75 V
Mounting Type
Surface Mount
Package / Case
10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
Operating Temperature
-40°C ~ 125°C
Internal Switch(s)
Yes
Efficiency
97%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Frequency
-
Current - Output / Channel
-
Other names
LM3409HVMYX
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3409HVMYX/NOPB
Manufacturer:
TI
Quantity:
7 710
www.national.com
8. INPUT UVLO
Solve for R
The closest 1% tolerance resistor is 49.9 kΩ therefore V
is:
Solve for R
Design #1 Bill of Materials
Qty
1
2
1
1
1
1
1
1
1
1
1
UV2
UV1
:
:
Part ID
LM3409HV/
LM3409QHV
C
C
C
Q1
D1
L1
R
R
R
R
IN1
F
OFF
OFF
UV1
UV2
SNS
, C
IN2
Part Value
Buck controller
2.2µF X7R 10% 100V
1.0µF X7R 10% 16V
470pF X7R 10% 50V
PMOS 100V 3.8A
Schottky 100V 3A
15 µH 20% 4.2A
24.9kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.1Ω 1% 1W
HYS
20
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 left open forcing V
10. PWM DIMMING METHOD
PWM dimming signal pair is applied to the EN pin and GND
at f
is:
DIM
= 1 kHz.
Manufacturer
NSC
MURATA
TDK
TDK
ZETEX
VISHAY
TDK
VISHAY
VISHAY
VISHAY
VISHAY
ADJ
Part Number
LM3409HVMY/
LM3409QHVMY
GRM43ER72A225KA01
L
C1608X7R1C105K
C1608X7R1H471K
ZXMP10A18KTC
SS3H10-E3/57T
SLF12565T-150M4R2
CRCW060324K9FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R1000FEA
= 1.24V.
TURN-