LM3445-EDSNEV/NOPB National Semiconductor, LM3445-EDSNEV/NOPB Datasheet

LM3445-EDSNEV/NOPB

Manufacturer Part Number

LM3445-EDSNEV/NOPB

Description

PROGRAMMERS, DEVELOPMENT SYSTEMS

Manufacturer

National Semiconductor

Series

PowerWise®r

Datasheets

1.LM3445MMNOPB.pdf (26 pages)

2.LM3445-EDSNEVNOPB.pdf (10 pages)

Specifications of LM3445-EDSNEV/NOPB

Current - Output / Channel

205 ~ 340 mA

Outputs And Type

1, Non-Isolated

Features

Dimmable

Voltage - Input

85 ~ 135 VAC

Utilized Ic / Part

LM3445

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

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LM3445 A19 Edison Retrofit

Evaluation Board

Introduction

The evaluation board included in this shipment converts

85V

nected LED’s at the currents listed in the Evaluation Board

Operating Conditions section. This is a two-layer board using

the bottom and top layer for component placement. The board

is surrounded by a larger area allowing for extra test points

and connectors for ease of evaluation. The actual board size

is contained inside the larger outer area and can be cut out

for the smallest size possible. The evaluation board can be

modified to adjust the LED forward current and the number of

series connected LEDs. The topology used for this evaluation

board eliminates the need for passive power factor correction

and results in high efficiency and power factor with minimal

component count which results in a size that can fit in a stan-

dard A19 Edison socket. This board will also operate correctly

and dim smoothly using most standard triac dimmers. Output

current is regulated within ±15% of nominal from circuit to cir-

cuit and over line voltage variation. Refer to the LM3445

datasheet for details on the LM3445 IC.

A bill of materials below describes the parts used on this

demonstration board. A schematic and layout have also been

included below along with measured performance character-

Simplified LM3445 Schematic

Warning: The LM3445 evaluation boards have no isolation or any type of protection from shock. Caution must be taken when handling evaluation board.

Warning: This LM3445 evaluation PCB is a non-isolated design. The ground connection on the evaluation board is NOT referenced to earth ground. If an

to 135V

Avoid touching evaluation board, and removing any cables while evaluation board is operating. Isolating the evaluation board rather than the

oscilloscope is highly recommended.

oscilloscope ground lead is connected to the evaluation board ground test point for analysis, and AC power is applied, the fuse (F1) will fail open.

The oscilloscope should be powered via an isolation transformer before an oscilloscope ground lead is connected to the evaluation board.

input and drives five to thirteen series con-

301246

National Semiconductor

Application Note 2061

Clinton Jensen

August 11, 2010

istics including EMI/EMC data. The above restrictions for the

input voltage are valid only for the demonstration board as

shipped with the schematic below. Please refer to the LM3445

data sheet for detailed information regarding the LM3445 de-

vice. The board is currently set up to drive five to thirteen

series connected LEDs, but the evaluation board may be

modified to accept more series LEDs. Refer to the tables in

this document for modifying the board to accept more LEDs

and/or adjust for different current levels.

Evalution Board Operating

Conditions

5 to 13 series connected LEDs as configured with the currents

listed below

Can drive up to 18 series LEDs (see table)

LED

= 85V

= 340 mA (5 LEDs)

= 300 mA (7 LEDs)

= 260 mA (9 LEDs)

= 230 mA (11 LEDs)

= 205 mA (13 LEDs)

to 135V

30124601

www.national.com

Related parts for LM3445-EDSNEV/NOPB

LM3445-EDSNEV/NOPB Summary of contents

Page 1

... Warning: This LM3445 evaluation PCB is a non-isolated design. The ground connection on the evaluation board is NOT referenced to earth ground oscilloscope ground lead is connected to the evaluation board ground test point for analysis, and AC power is applied, the fuse (F1) will fail open. ...

Page 2

... Pull above 4.9V (typical) to tri-state DIM. 3 DIM Input/output dual function dim pin. This pin can be driven with an external PWM signal to dim the LEDs. It may also be used as an output signal and connected to the DIM pin of other LM3445 or LED drivers to dim multiple LED circuits simultaneously. 4 COFF OFF time setting pin ...

Page 3

... LM3445 Evaluation Board Schematic 3 www.national.com ...

Page 4

... Bill of Materials LM3445 Evaluation Board REF DES U1 IC DRIVER LED W/TRIAC DIM 10MSOP C1, C10 Ceramic, 47000pF, 500V, X7R, 1210 C2 CAP FILM MKP .0047µF 310VAC X2 C3 CAP 470µF 50V ELECT PW RADIAL C4/RBLDR (Note 1) C5 Ceramic, .33µF, 250V, X7R, 1812 C6 CAP .10µF 305VAC EMI SUPPRESSION C8 Ceramic, 47µ ...

Page 5

Output Current versus Number of LEDs for Various Modifications # of LEDs Output Current (mA) Original Circuit 340 6 315 7 300 8 275 9 260 10 245 11 230 12 215 13 205 14 (Note ...

Page 6

Typical Performance Characteristics Efficiency vs. Line Voltage Original Circuit Efficiency vs. Line Voltage Modification A Efficiency vs. Line Voltage Modification B www.national.com Power Factor vs. Line Voltage Original Circuit 30124602 Power Factor vs. Line Voltage Modification A 30124611 Power Factor ...

Page 7

... PCB Layout Warning: The LM3445 evaluation boards have no isolation or any type of protection from shock. Caution must be taken when handling evaluation board. Avoid touching evaluation board, and removing any cables while evaluation board is operating. Isolating the evaluation board rather than the oscilloscope is highly recommended ...

Page 8

EMI/EMC Information Frequency Quasi-peak Amplitude Neutral 154 kHz Line 1.1 MHz www.national.com Radiated EMI Conducted EMC. Line = Blue, Neutral = Black. Quasi-peak Quasi-peak Limit Delta 30124615 30124616 Average Average Limit Average Amplitude Delta 47 56 ...

Page 9

Notes 9 www.national.com ...

Page 10

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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