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

www.national.com
LM3409QHVMYX
LM3409QHVMY
LM3409HVMYX
Order Number
LM3409HVMY
LM3409QMYX
Connection Diagram
Ordering Information
*Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies.
Reliability qualification is compliant with the requirements and temperature grades defined in the AEC-Q100 standard. Automotive grade products are identified
with the letter Q. For more information go to http://www.national.com/automotive.
Pin Descriptions
LM3409QMY
LM3409MYX
LM3409MY
Pin(s)
DAP
10
1
2
3
4
5
6
7
8
9
PGATE
Name
UVLO
COFF
IADJ
GND
CSN
CSP
VCC
DAP
VIN
EN
NSC Package
MUC10A
MUC10A
MUC10A
MUC10A
MUC10A
MUC10A
MUC10A
MUC10A
Drawing
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
Top Marking
10-Lead Exposed Pad eMSOP Package
SYHB
SYHB
SXFB
SXFB
SZDB
SZDB
SZEB
SZEB
LM3409/09Q/09HV/09QHV
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 a resistor from V
time.
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 (also connected to
VIN).
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 layer GND
plane.
2
1000 Units on tape and reel
3500 Units on tape and reel
1000 Units on tape and reel
3500 Units on tape and reel
1000 Units on tape and reel
3500 Units on tape and reel
1000 Units on tape and reel
3500 Units on tape and reel
Supplied As
30085602
O
, and a capacitor from GND to set the off-
IN
and GND. Turn-on threshold is
AEC-Q100 Grade 1 qualified.
IN
. The regulator provides
Automotive Grade
Production Flow*
Feature