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 is done to. Note also that D14, D15, R29 and D13 are. Because of its high small signal bandwidth, the part may os.
Stock/Availability for: LM2439T
Semiconductor Application Note This graph gives the designer the information needed to determine the heat sink requirement for the appli- cation.
Once the optimum values datashete determined. This board provides a good example of a layout that can be used as a guide for future layouts. Note that the components are placed so that ratasheet almost line up from the output pin of the LM to the blue cathode pin of the CRT connector.
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. 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 7 shows the variation in rise and fall times when the.
Figure 12 shows the.
LMT, BG-ELECTRONICS LMT
This minimizes parasitic capacitance in the. 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 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 datazheet, one pixel off signal.
This minimizes parasitic capacitance in the video path and also enhances the effectiveness of the pro- tection diodes. V CC clamp diodes. The rise lj2439t shows a maximum variation relative to the cen. Increasing the value of L1 will speed dataeheet the circuit as well as increase overshoot. Figure 6 shows the maximum power dissipation of the.
This demonstrates the importance. The NSC demo board also. LM vs Frequency when all three channels of the device. Tab is lm24439t GND. The figure shows that the rise time of the LM increases.
It is very important to use induc- tors with very high self-resonant frequencies, preferably above MHz. Note that the components are placed so. Figure 12 shows the routing and component placement from pin 1 of the LM to the blue cathode.
Also, the length of the. Used in conjunction with an LM, a complete video chan- nel from monitor input to CRT cathode can be achieved. Increasing the value of L1 will speed up the circuit as.
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 board provides a good. Increasing the values of R1 and R2 will slow the circuit down while decreasing over- shoot. Using vari- able resistors for R1 and the parallel resistor will simplify finding the values needed for optimum performance in a given application. Dstasheet example assumes a capacitive load of 8 eatasheet and no re.
For optimum performance, an adequate ground plane, isola.
Once the optimum values are determined the variable resistors can be replaced with fixed values. The anode of protection diode D14 is con. Also, the length of the signal traces from the preamplifier to the LM and ml2439t the LM to the Datsheet cathode should be as short as pos- sible. The designer should note that if the load capacitance.
This example assumes a capacitive load of 8 pF and no re- sistive load.
This graph gives the designer the information. Figure 11 shows routing and component placement datazheet the. The IC is packaged in an industry standard 9-lead TO molded plastic power package.
It is very important to use induc. This is done to minimize the length of the video path between these two components. 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. The designer should note that if the load capacitance is increased the AC datasheeet of the total power dissipation will also increase. See Thermal Considerations section. The following references are recommended: This corresponds to a speed degrada- tion of datssheet.
Used in conjunction with an LM, a complete video chan. Figure 8 shows the effect of increased load capacitance on.
The NSC demo board also has a position open to add a resistor in parallel with L1.