LM3410XSDLEDEV National Semiconductor, LM3410XSDLEDEV Datasheet

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LM3410XSDLEDEV

Manufacturer Part Number
LM3410XSDLEDEV
Description
BOARD EVAL LM3410 BOOST LLP
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheets

Specifications of LM3410XSDLEDEV

Outputs And Type
1, Non-Isolated
Voltage - Output
3 ~ 24V
Features
Thermal Shutdown Protection
Voltage - Input
2.7 ~ 5.5V
Utilized Ic / Part
LM3410
Kit Contents
Board, Datasheet
Svhc
No SVHC (15-Dec-2010)
Kit Features
Converts 2.7V To 5.5V Input And Illuminates Five 50 MA LEDs In Series Using The LM3410X
Mcu Supported Families
LM3410
Rohs Compliant
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output / Channel
-
© 2008 National Semiconductor Corporation
LM3410X LED Driver 6-Pin
LLP Demo Board
Introduction
The demo board included in this shipment converts 2.7V to
5.5V input, and illuminates four 50mA LED’s in series using
the LM3410X 1.6MHz LED driver switching converter. This is
a 2-layer board using the bottom layer as a Ground plane.
A bill of materials below describes the parts used on this demo
board. A schematic and layout have also been included below
Pin Descriptions - 6 Pin LLP
DAP
Pin
1
2
3
4
5
6
PGND
AGND
Name
GND
DIM
VIN
SW
FB
Function
Power ground pin. Place PGND and output capacitor GND close together.
Supply voltage for power stage, and input supply voltage.
Dimming & shutdown control input. Logic high enables operation. Duty Cycle from 0 to 100%. Do not
allow this pin to float or be greater than VIN + 0.3V.
Feedback pin. Connect FB to external resistor divider to set output voltage.
Signal ground pin. Place the bottom resistor of the feedback network as close as possible to this pin &
pin 4.
Output switch. Connect to the inductor, output diode.
Signal & Power ground. Connect to pin 1 & pin 5 on top layer. Place 4-6 vias from DAP to bottom layer
GND plane.
300488
LM3410X 6-Pin LLP Schematic
Pinout
National Semiconductor
Application Note 1774
Matthew Reynolds
February 1, 2008
along with measured performance characteristics. The above
restrictions for the input voltage are valid only for the demo
board as shipped with the demo board schematic below.
Operatiing Conditions
V
V
I
O
IN
O
= 50mA
= 2.7V to 5.5V
V
F
x 4 + V
30048802
FB
3.6V x 4 + 0.198V
30048801
14.4V
www.national.com

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LM3410XSDLEDEV Summary of contents

Page 1

... Output switch. Connect to the inductor, output diode. Signal & Power ground. Connect to pin 1 & pin 5 on top layer. Place 4-6 vias from DAP to bottom layer DAP GND GND plane. © 2008 National Semiconductor Corporation National Semiconductor Application Note 1774 Matthew Reynolds February 1, 2008 along with measured performance characteristics ...

Page 2

Bill of Materials LM3410X Part ID U1 C1, Input Cap C2 Output Cap D1, Catch Diode 0. LED’s SMD-1206, 50mA, V LM3410X Efficiency vs Input Voltage Series LEDs @ 50mA LM3410X Average LED Current vs Duty-Cycle & ...

Page 3

PCB Layout Demonstration Board Top Layer Demonstration Board Bottom Layer 3 30048805 30048806 www.national.com ...

Page 4

V > 5.5V Application Circuit PWR The demonstration board provided can easily be modified to allow the user to derive the power from an input supply that is larger than 5.5V. In figure 1 two separate supplies are ...

Page 5

Part ID Part Value U1 2. Input Cap 10µF, 6.3V, X5R PWR C2 Output Cap 1µF, 25V, X5R C3 V Input Cap 0.1µF,16V, X5R IN D1, Catch Diode 0.43V , Schotky, 0.5A, 30V f L1 6.8µH ...

Page 6

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