LM3409EVAL National Semiconductor, LM3409EVAL Datasheet - Page 2

• Manufacturer Part Number: LM3409EVAL
• Description: BOARD EVALUATION FOR LM3409
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3409EVAL

• Current - Output / Channel: 1A
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 15V
• Features: Dimmable
• Voltage - Input: 6 ~ 42 V
• Utilized Ic / Part: LM3409
• Kit Contents: Board, Datasheet
• Svhc: No SVHC (15-Dec-2010)
• Kit Features: Drives 4 LEDs At Maximum Average LED Current 1A From DC Input Voltage 24V
• Mcu Supported Families: LM3409
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Pin Descriptions
Bill of Materials
Pin(s)
DAP
10
1
2
3
4
5
6
7
8
9
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
PGATE
Name
UVLO
COFF
IADJ
GND
CSN
CSP
VCC
DAP
VIN
EN
Part ID
U1
C1
C2, C5
C3
C4
C6
Q1
D1
L1
R1
R2
R3
R4
R5
J1
J2
VIN, GND
VADJ, LED+, LED-
V
Thermal pad on bottom of IC
IN
Input under-voltage lockout
Analog LED current adjust
- referenced linear regulator
Negative current sense
Off-time programming
Positive current sense
Logic level enable
Input voltage
Description
Gate drive
Ground
output
Part Value
Buck controller
4.7µF X7R 20% 50V
No Load
470pF X7R 10% 50V
1.0µF X7R 10% 16V
0.1µF 50V 10% X7R
PMOS 70V 5.7A
Schottky 60V 5A
22 µH 20% 3.5A
15.4kΩ 1%
6.98kΩ 1%
49.9kΩ 1%
0.2Ω 1% 1W
250kΩ potentiometer
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
TDK
TDK
MURATA
ZETEX
VISHAY
TDK
VISHAY
VISHAY
VISHAY
VISHAY
BOURNS
MOLEX
SAMTEC
KEYSTONE
KEYSTONE
O
, and capacitor to GND to set the off-time.
IN
and GND. Turn-on threshold is
Part Number
LM3409MY
GRM55ER71H475MA01L
C1608X7R1H471K
C1608X7R1C105K
C1608X7R1C104K
ZXMP7A17KTC
CDBC560-G
SLF12565T-220M3R5
CRCW060315K4FKEA
CRCW06036K98FKEA
CRCW060349K9FKEA
WSL2512R2000FEA
3352P-1-254
22-28-4033
TSSH-107-01-S-D-RA
575-8
1502-2
IN
. The regulator provides
IN
).