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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This corresponds to a speed degrada- tion of 0. This resistor can be used to help control overshoot.
The designer should note that if the load capacitance. Increasing the value of L1 will speed up the circuit as well as increase overshoot.
(PDF) LM2439T Datasheet download
The anode of protection diode D14 is con. The val- ues shown in Figure 9 can be used as a good starting point for the evaluation of the LM The rise time shows a maximum variation relative to the cen.
Figure 12 shows the. Also, the length of the. This corresponds to a speed degrada. Schematic and Connection Diagrams. Figure 7 shows the variation in rise and fall times when the.
Note also that D14, D15, R29 and D13 are. The NSC demo board also.
LMT datasheet, Pinout ,application circuits Monolithic Triple Ns CRT Driver [Obsolete]
Note the location of the following components: Increasing the values of R1. 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. For optimum performance, an adequate ground plane, isola.
This minimizes parasitic capacitance in the. Figure 6 shows the maximum power dissipation of the LM vs Frequency when all three channels of the device datasheeet driving an 8 pF load with a 40 V p-p alternating one pixel on, one pixel off signal. Because of its high small signal bandwidth, the part may os. Increasing the values of R1 and R2 will slow the circuit down datasheeet decreasing over- shoot.
The diode placement and routing is very important for minimizing the voltage 5 www. Once the optimum values are determined.
Once the optimum values are determined the variable resistors can be replaced with fixed values. This graph gives the designer the information.
Note also that D14, D15, R29 and D13 are placed to minimize the size of the video nodes darasheet they are attached to. 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.
Figure 4 shows the performance lj2439t the LM in the test. Used in conjunction with an LM, a complete video chan- nel from monitor input to CRT cathode can be achieved.
Monolithic Triple 9.5 Ns CRT Driver [Obsolete]
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 D Figure 11 shows routing and component placement on the. Figure 6 shows the maximum power dissipation of the. The fall time shows a. Per- formance is ideal for x resolution displays with pixel clock frequencies up to 75 MHz.
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.
This demonstrates the importance. Increasing the value of L1 will speed up the circuit as.
LMT Datasheet(PDF) – National Semiconductor (TI)
This board provides a good. The schematic of the board is shown in Figure LM vs Frequency when all three channels of the device. The IC is packaged in an industry standard 9-lead TO Semiconductor Application Note Using vari- able resistors for R1 and the parallel resistor will simplify finding the values needed for optimum performance in a given application. It is very important to use induc- tors with very high self-resonant frequencies, preferably above MHz.
Figure 12 shows the routing and component placement from pin 1 of the LM to the blue cathode. Because of its high small signal bandwidth, the part may os- cillate in a monitor if feedback occurs around the video chan- nel through the chassis wiring.
This is done to. This graph gives the designer the information needed to determine the heat sink requirement for the appli- cation. The figure shows that the rise time of the LM increases.