Fairchild FEB157-001 manual Printed Circuit Board, RTH1

Page 10

 

 

 

www.fairchildsemi.com

 

 

 

 

3.3 Bill of Materials (Continued)

 

 

 

 

 

 

Sch Ref

Vendor

Part Number

Description

 

 

 

 

R17

NIC Components or Equivalent

NRC06J511TR

510, 1/10 W, 0603

 

 

 

 

R18

NIC Components or Equivalent

NRC06J101TR

100, 1/10 W, 0603

 

 

 

 

R19

 

 

Prov. for 2010

 

 

 

 

R20

NIC Components or Equivalent

NRC50J102TR

1k, 3/4 W, 2010

 

 

 

 

R21

NIC Components or Equivalent

NRC50J470TR

47, 3/4 W, 2010

 

 

 

 

RTH1

NIC Components or Equivalent

NCT08AJ104334TR

10k, NTC Thermistor, Beta = 3340

 

 

 

 

T1

Cooper

CTX0117893

EFD20 Core/Bobbin Transformer

 

 

 

 

TP1

Keystone

5002

PC Test Point-White

 

 

 

 

TP2

Keystone

5001

PC Test Point-Black

 

 

 

 

TP3

Keystone

5000

PC Test Point-Red

 

 

 

 

TP4

Keystone

5000

PC Test Point-Red

 

 

 

 

TP5

Keystone

5001

PC Test Point-Black

 

 

 

 

TP6

Keystone

5003

PC Test Point-Orange

 

 

 

 

ZD1

Fairchild

MMSZ5248B

18V, 1/2W, SOD-123

 

 

 

 

ZD2

 

 

Prov. for SOD-123

 

 

 

 

3.4 Printed Circuit Board

The PCB is a double sided board made of FR4 with 1oz copper.

Figure 4: Silkscreen/Component Placement of PCB Layout

© 2007 Fairchild Semiconductor

Page 10 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