Fairchild FEB157-001 manual 526692/7

Page 17

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© 2007 Fairchild Semiconductor

Page 17 of 17

Rev 1.1 April 2007

Image 17
Contents FEB157-001 User’s Guide Contents Circuit Description Introduction Product DescriptionOffline LED Driver and LED Assembly Jumper JP1/JP2 Status and LED Current JP1 Status Output Requirements Electrical Requirements Input RequirementsDesigned Solution 3.1 Schematic Bill of Materials TransformerRS1M RTH1 Printed Circuit BoardSilkscreen/Component Placement of Top Side Layer LED Current vs. Line Voltage Test Results 4.1 Regulation Line RegulationEfficiency Steady State Waveforms at 90Vac with Three LEDs at 1A Steady State OperationStartup Profile at 90 Vac with Three LEDs at 1A Start upFairchild Semiconductor 526692/7