Fairchild FEB157-001 manual Fairchild Semiconductor

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Warning and Disclaimer:

This Evaluation Board may employ high voltages so appropriate safety precautions should be used when operating this board. Replace components on the Evaluation Board only with those parts shown on the parts list in the User's Guide. Contact an authorized Fairchild representative with any questions.

The Evaluation Board is for demonstration purposes only and neither the Board nor this User's Guide constitute a sales contract or create any kind of warranty, whether express or implied, as to the applications or products involved. Fairchild warranties that its products will meet Fairchild's published specifications but does not guarantee that its products will work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function or design. Either the applicable sales contract signed by Fairchild and Buyer, or if no contract exists Fairchild's Standard Terms and Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein.

© 2007 Fairchild Semiconductor

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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