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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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LM2437T Folha de dados(PDF) 6 Page - National Semiconductor (TI) |
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LM2437T Folha de dados(HTML) 6 Page - National Semiconductor (TI) |
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6 / 10 page  Application Hints (Continued) good example of a layout that can be used as a guide for fu- ture layouts. Note the location of the following components: • C55 — V CC bypass capacitor, located very close to pin 4 and ground pins • C43, C44 — V BB bypass capacitors, located close to pin 8 and ground • C53–C56 — V CC bypass capacitors, near LM2437 and V CC clamp diodes. Very important for arc protection. The routing of the LM2437 outputs to the CRT is very critical to achieving optimum performance. Figure 12 shows the routing and component placement from pin 1 of the LM2437 to the blue cathode. Note that the components are placed so that they almost line up from the output pin of the LM2437 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 LM2437 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 LM2437 during an arcover event. Lastly, notice that S3 is placed very close to the blue cathode and is tied directly to CRT ground. www.national.com 6 |
Nº de peça semelhante - LM2437T |
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Descrição semelhante - LM2437T |
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