LM5020EVAL National Semiconductor, LM5020EVAL Datasheet
LM5020EVAL
Specifications of LM5020EVAL
Related parts for LM5020EVAL
LM5020EVAL Summary of contents
Page 1
... Here the similarity ends. A second coupled wind- ing of the inductor transfers the energy to a secondary side © 2005 National Semiconductor Corporation National Semiconductor Application Note 1314 Grant Smith ...
Page 2
Powering and Loading Considerations When applying power to the LM5020 evaluation board cer- tain precautions should be followed. The LM5020 evaluation board is quite forgiving of load and input power variations. The possibility of shipping damage or infant failure is ...
Page 3
Performance Characteristics TURN-ON WAVEFORMS When applying power to the LM5020 evaluation board a certain sequence of events must occur. The soft-start feature allows for a minimal output voltage for a short time until the feedback loop can stabilize without overshoot. ...
Page 4
Performance Characteristics (Continued) Trace 1: Input Voltage, at 30VDC. Volts/div = 20.0V Trace 2: Output Voltage, at full load. Volts/div = 2.0V Trace 3: Output Current, at full load. Amps/div = 2.0A Horizontal Resolution = 1.0ms/div FIGURE 3. Trace 1: ...
Page 5
Performance Characteristics (Continued) TRANSFORMER WAVEFORMS Figure 7, Figure 8 and Figure 9 show typical waveforms at the junction of Q1 mosfet and the transformer primary wind- ing. Also shown are typical waveforms at the junction of the transformer secondary and ...
Page 6
www.national.com 6 ...
Page 7
Layout and Bill of Materials The Bill of Materials is shown below and includes the manu- facturer and part number. The layers of the printed circuit board are shown in top down order. View is from the top Designator Description ...
Page 8
PCB Layouts www.national.com 8 20095313 20095314 ...
Page 9
PCB Layouts (Continued) 9 20095315 20095316 www.national.com ...
Page 10
... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...