LM2439T DATASHEET PDF

LMT LM – Monolithic Triple NS CRT Driver, Package: to , Pin Nb=9. The is an integrated high voltage CRT driver circuit designed for use in. Download National Semiconductor Corporation LMT pdf datasheet file. LMT Datasheet PDF Download – Monolithic Triple ns CRT Driver, LMT data sheet.

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Also, the length of the signal traces from the preamplifier to the LM ratasheet from the LM to the CRT cathode should be as short as pos- sible. The LM case temperature must be maintained below. This minimizes parasitic capacitance in the video path and also enhances the effectiveness of the pro- tection diodes.

This is done to. Once the optimum values are determined. Once the optimum values are determined the variable resistors can be replaced with fixed values. The designer should note that if the load capacitance is increased the AC component of the total power dissipation will also increase. Note that the components are placed so that they almost line up from the output pin of the LM to the blue cathode pin of the CRT connector. The figure shows that the rise time of the LM increases.

The IC is packaged in an industry standard 9-lead TO molded plastic dayasheet package.

Figure 4 shows the performance of the LM in the test. Figure 11 shows routing and component l,2439t on the. This graph gives the designer the information needed to determine the heat sink requirement for the appli- cation.

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LMT 데이터시트(PDF) – National Semiconductor (TI)

This demonstrates the importance. The cath- ode of D15 is connected to V CC very close to decoupling ca- dagasheet C55 see Figure 12 which is connected to the same section of the ground plane as D This board provides a good. It is very important to use induc.

The fall time shows a. Figure 7 shows the variation in rise and fall times when the. Figure 12 shows the routing and component placement from pin 1 of the LM to the blue cathode.

Increasing the value of L1 will speed up the circuit as well as increase overshoot. Increasing the value of L1 will speed up the circuit as. To prevent this, leads to the video amplifier input circuit should be shielded, and input cir- cuit wiring should be spaced as far as possible from output circuit wiring. A typical application of the LM is shown in Figure Per- formance is ideal for x resolution displays with pixel clock frequencies up to 75 MHz.

Figure 12 shows the. V CC clamp diodes. See Thermal Considerations section.

The val- ues shown in Figure 9 can be used as a good starting point for the evaluation of the LM This minimizes parasitic capacitance in the. Ferrite core inductors from J.

Monolithic Triple 9.5 Ns CRT Driver [Obsolete]

Note datawheet location dtasheet the following components: It is very important to use induc- tors with very high self-resonant frequencies, preferably above MHz. The NSC demo board also. Used in conjunction with an Datasyeet, a complete video chan- nel from monitor input to CRT cathode can be achieved. Using vari- able resistors for R1 and the parallel resistor will simplify finding the values needed for optimum performance in a given application.

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The designer should note that if the load capacitance. This is done to minimize the length of the video path between these two components. Note also that D14, D15, R29 and D13 are. Increasing the values of R1. Figure 6 shows the maximum power dissipation of the.

The schematic of the board is shown in Figure This example assumes a capacitive load of 8 pF and no re- sistive load. Referring to Figure 9there are three components R1, R2.

This example assumes a capacitive load of 8 pF and no re. Note also that D14, D15, R29 and D13 are placed to minimize the size of the video nodes that they are attached to. This board provides a good example of a layout that can be used as a guide for future layouts. LM vs Frequency when all three channels of the device. Figure 10 is the sche. The rise time shows a maximum variation relative to the cen.

The IC is packaged in an industry standard 9-lead TO Used in conjunction with an LM, a complete video chan.