LM3409EVAL/NOPB National Semiconductor, LM3409EVAL/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM3409EVAL/NOPB
• Description: LED Driver Demo Board
• Manufacturer: National Semiconductor

Specifications of LM3409EVAL/NOPB

• Core Chip: LM3409
• Topology: Buck (Step Down)
• No. Of Outputs: 1
• Dimming Control Type: PWM
• Tool / Board Applications: Lighting-LED, High Bright LED, LED Driver, Flourescent, Backlighting
• Development Tool Type: Hardware - Eval/Demo Board
• Mcu Supported Families: LM3409 Family

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Pin Descriptions
Bill of Materials
Qty
1
2
1
1
1
1
1
3
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
7
Pin(s)
DAP
10
1
2
3
4
5
6
7
8
9
Part ID
U1
C1, C2
C3
C4
C5
C6
C7
C8, D2, R11
C9
Q1
Q2
Q3
D1
L1
R1, R2
R3
R4
R5
R6
R7
R8
R9
R10
J1
J2
VIN, GND
EN, Vadj, +5V, GND2,
PWM2, LED+, LED-
PGATE
Name
UVLO
COFF
IADJ
GND
CSN
CSP
VCC
DAP
VIN
EN
Thermal pad on bottom of IC
Input under-voltage lockout
Analog LED current adjust
Negative current sense
Off-time programming
Positive current sense
linear regulator output
Logic level enable /
V
PWM dimming
Input voltage
Description
IN
Gate drive
- referenced
Ground
Part Value
Buck controller
2.2µF X7R 10% 100V
0.1µF X7R 10% 100V
1.0µF X7R 10% 16V
0.1µF X7R 10% 50V
0.1µF X7R 10% 50V
470pF X7R 10% 50V
No Load
2200pF X7R 10% 50V
PMOS 100V 3.8A
CMOS 30V 2A
NMOS 100V 7.5A
Schottky 100V 3A
33 µH 20% 3.2A
1Ω 1%
10kΩ 1%
100Ω 1%
0Ω 1%
16.5kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.15Ω 1% 1W
1kΩ 1%
3 pin header
2x7 pin RA shrouded
banana jack
turret
Application Information
Connect to a resistor divider from V
1.24V and hysteresis for turn-off is provided by a 22µA current source.
Apply a voltage between 0 - 1.24V, connect a resistor to GND, or leave
open to set the current sense threshold voltage.
Apply a voltage >1.74V to enable device, a PWM signal to dim, or a
voltage <0.5V for low power shutdown.
Connect resistor to V
Connect to the system ground.
Connect to the gate of the external PFET.
Connect to the negative side of the sense resistor.
Connect to the positive side of the sense resistor (V
Connect at least a 1µF ceramic capacitor to V
power for the PFET drive.
Connect to the input voltage.
Connect to pin 5 (GND). Place 4-6 vias from DAP to bottom GND plane.
2
Manufacturer
NSC
MURATA
MURATA
TDK
MURATA
MURATA
TDK
MURATA
ZETEX
FAIRCHILD
FAIRCHILD
VISHAY
TDK
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
VISHAY
MOLEX
SAMTEC
KEYSTONE
KEYSTONE
O
, and capacitor to GND to set the off-time.
Part Number
LM3409HVMY
GRM43ER72A225KA01L
GRM188R72A104KA35D
C1608X7R1C105K
GRM319R71H104KA01D
GCM188R71H104KA57D
C1608X7R1H471K
GRM188R71H222KA01D
ZXMP10A18KTC
FDC6333C
FDS3672
SS3H10-E3/57T
SLF12575T-330M3R2
CRCW06031R00FNEA
CRCW060310K0FKEA
CRCW0603100RFKEA
CRCW06030000Z0EA
CRCW060316K5FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R1500FEA
CRCW06031K00FKEA
22-28-4033
TSSH-107-01-S-D-RA
575-8
1502-2
IN
and GND. Turn-on threshold is
IN
. The regulator provides
IN
).