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 designer should note that if the load capacitance. It is very important to use induc- tors with very high self-resonant frequencies, preferably above MHz. Used in conjunction with an LM, a complete video chan- nel from monitor input to CRT cathode can be achieved.
(PDF) LM2439T Datasheet download
The schematic of the board is shown in Figure This corresponds to a speed degrada- lm24439t of 0. Increasing the value of L1 will speed up the circuit as well as increase overshoot. Schematic and Connection Diagrams.
Referring to Figure 9there are three components R1, R2. Figure 4 shows the performance of the LM in the test.
LMT datasheet, Pinout ,application circuits Monolithic Triple Ns CRT Driver [Obsolete]
Note that the components are placed so. This lm243t9 to a speed degrada. To prevent this, leads to the. 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.
The NSC demo board also has a position open to add a resistor in parallel with L1.
The val- ues shown in Figure 9 can be used as a good starting point for the evaluation of the LM The rise time vatasheet a maximum variation relative to the cen. Increasing the values of R1 and R2 will slow the circuit down while decreasing over- shoot. 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. See Thermal Considerations section. This is done to minimize the length of the video path between these two components.
Figure 7 shows the variation in rise and fall times when the. Figure 12 shows the. Because of its high small signal bandwidth, the part may os.
This graph gives the designer the information. Figure 6 shows the maximum power dissipation of the. Used in conjunction with an LM, a complete video chan.
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. The LM case temperature must be maintained below. This example assumes a capacitive load of 8 pF and no re.
LMT 데이터시트(PDF) – National Semiconductor (TI)
The figure shows that the rise time of the LM increases. Figure 12 shows the routing and component placement from pin 1 of the LM to the blue cathode. Very important for arc protection. This board provides a good. Once the optimum values are determined the variable resistors can be replaced with fixed values.
Increasing the value of L1 will speed up the circuit as. 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.
Also, the length of the. A typical application of the LM is shown in Figure Ferrite core inductors from J. It is very important to use induc. Once the optimum values are determined. The fall time shows a. This resistor can be used to help control overshoot. This board provides a good example of a layout that can be used as a guide for future layouts. The following references are recommended: Note the location of the following components: MHz bandwidth then a maximum heat sink thermal resis.
Semiconductor Application Note Figure 8 shows the effect of increased load capacitance on. Tab is at GND. Increasing the values of R1.
This is done to. LM vs Frequency when all three channels of the device. For optimum performance, an adequate ground plane, isola. This example assumes a capacitive load of 8 pF and no re- sistive load.