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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2415 Datenblatt(PDF) 6 Page - National Semiconductor (TI) |
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LM2415 Datenblatt(HTML) 6 Page - National Semiconductor (TI) |
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6 / 10 page  Application Hints (Continued) NSC Demonstration Board Figure 11 shows routing and component placement on the NSC LM1279/240X demonstration board. The schematic of the board is shown in Figure 10. This board provides a good example of a layout that can be used as a guide for future layouts. Note the location of the following components: • C55 —V CC bypass capacitor, located very close to pin 6 and ground pins • C43, C44 —V BB bypass capacitors, located close to pin 10 and ground • C53–C55 —V CC bypass capacitors, near LM2415 and V CC clamp diodes. Very important for arc protection. The routing of the LM2415 outputs to the CRT is very critical to achieving optimum performance. Figure 12 shows the routing and component placement from pin 1 of the LM2415 to the blue cathode. Note that the components are placed so that they almost line up from the output pin of the LM2415 to the blue cathode pin of the CRT connector. This is done to minimize the length of the video path between these two components. Note also that D14, D15, R29 and D13 are placed to minimize the size of the video nodes that they are attached to. This minimizes parasitic capacitance in the video path and also enhances the effectiveness of the pro- tection diodes. The anode of protection diode D14 is con- nected directly to a section of the the ground plane that has a short and direct path to the LM2415 ground pins. The cath- ode of D15 is connected to V CC very close to decoupling ca- pacitor C55 (see Figure 12) which is connected to the same section of the ground plane as D14. The diode placement and routing is very important for minimizing the voltage stress on the LM2415 during an arc over event. Lastly, notice that S3 is placed very close to the blue cathode and is tied directly to CRT ground. www.national.com 6 |
Ähnliche Teilenummer - LM2415 |
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Ähnliche Beschreibung - LM2415 |
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