Fairchild FEB157-001 manual Contents

Page 2

 

 

 

www.fairchildsemi.com

 

 

Contents

 

1.

Introduction

3

 

1.1

Product Description

3

 

1.2

Circuit Description

3

2.

Electrical Requirements

6

 

2.1

Input Requirements

6

 

2.2

Output Requirements

6

3.

Designed Solution

7

 

3.1

Schematic

7

 

3.2

Transformer

8

 

3.3

Bill of Materials

8

 

3.4

Printed Circuit Board

10

4.

Test Results

12

 

4.1

Regulation

12

 

 

4.1.1 Line Regulation

12

 

4.2

Efficiency

13

 

4.3

Steady State Operation

14

 

4.4

Start up

15

© 2007 Fairchild Semiconductor

Page 2 of 17

Rev 1.1 April 2007

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Contents FEB157-001 User’s Guide Contents Introduction Product Description Circuit DescriptionOffline LED Driver and LED Assembly Jumper JP1/JP2 Status and LED Current JP1 Status Electrical Requirements Input Requirements Output RequirementsDesigned Solution 3.1 Schematic Transformer Bill of MaterialsRS1M Printed Circuit Board RTH1Silkscreen/Component Placement of Top Side Layer Test Results 4.1 Regulation Line Regulation LED Current vs. Line VoltageEfficiency Steady State Operation Steady State Waveforms at 90Vac with Three LEDs at 1AStart up Startup Profile at 90 Vac with Three LEDs at 1AFairchild Semiconductor 526692/7