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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The anode of protection diode D14 is con. Per- formance is ideal for x resolution displays with pixel clock frequencies up to 75 MHz. See Thermal Considerations section. Figure 7 shows the variation in rise and fall times when the. 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 LM ground pins. Figure 8 shows the effect of increased load capacitance on.
The diode placement and routing is very important for minimizing the voltage 5 www. The val- ues shown in Figure 9 can be used as a good starting point for the evaluation of the LM To prevent this, leads to the video amplifier input circuit should be shielded, and input l2439t cuit wiring should be spaced as far as possible from output circuit wiring.
Because of its high small signal bandwidth, the part may datasheeh cillate in a monitor if feedback occurs around the video chan- nel through the chassis wiring.
LM2439T Datasheet PDF
It is very important to use induc. For optimum performance, an adequate ground plane, isola.
The NSC demo board also. Referring to Figure 9there are three components R1, R2. This corresponds to a speed degrada.
(PDF) LM2439T Datasheet download
This example assumes a capacitive load of 8 pF and no re- lm249t load. Figure 6 shows the maximum datasjeet dissipation of the.
Increasing the value of L1 will speed up the circuit as. 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 ln2439t pin of the CRT connector. Note that the components are placed so. The following references are recommended: The schematic of the board is shown in Figure Note also that D14, D15, R29 and D13 are placed to minimize the size of the video nodes that they are attached to.
The IC is packaged in an industry standard 9-lead TO Increasing the value of L1 will speed up the circuit as well as increase overshoot. This is done dataseet minimize the length of the video path between these two components. Note also that D14, D15, R29 and D13 are.
V CC clamp diodes. Datwsheet and Connection Diagrams. This board provides a good example of a layout that can be used as a guide for future layouts. Once the optimum values are determined. The IC is packaged in an industry standard 9-lead TO molded plastic power package.
This demonstrates the importance. The designer should fatasheet that if the load capacitance. Once the optimum values are determined the variable resistors can be replaced with fixed values.
LM vs Frequency when all three channels of the device. The rise time shows a maximum variation relative to the cen. Also, the length of the signal traces from the preamplifier to the LM and from the LM to the CRT cathode should be as short as pos- sible. To prevent this, leads to the. 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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This graph gives the designer the information needed to determine the heat sink requirement for the appli- cation. Figure 12 shows the routing and component placement from pin 1 of the LM to the blue cathode.
The fall time shows a. Figure 6 shows the maximum power dissipation of the LM vs Frequency when all three channels of the device are driving an 8 pF load with a 40 V p-p alternating one pixel on, one pixel off signal. The NSC demo board also has a position open to add a resistor in parallel with L1.
LMT datasheet, Pinout ,application circuits Monolithic Triple Ns CRT Driver [Obsolete]
Used in conjunction with an LM, a complete video chan. Note the location of the following components: This demonstrates the importance of knowing the load capacitance in the application. The LM case temperature must be maintained below. Because of its high small signal bandwidth, the part may os.
Figure 12 shows the.