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參數(shù)資料
| 型號： | LM2438T |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Monolithic Triple 13.5 ns CRT Driver |
| 中文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PZFM9 |
| 封裝： | PLASTIC, TO-220, 9 PIN |
| 文件頁數(shù)： | 7/11頁 |
| 文件大小： | 613K |
| 代理商： | LM2438T |
Application Hints
(Continued)
NSC DEMONSTRATION BOARD
Figure 12 shows the routing and component placement on
the NSC LM1279/2438 demonstration board. The schematic
of the board is shown in Figure 11 This board provides a
good example of a layout that can be used as a guide for fu-
ture layouts. Note the location of the following components:
C54, C56— V
bypass capacitor, located very close to
pin 4 and ground pins
C43, C44— V
BB
bypass capacitors, located close to pin
8 and ground
C53, C55— Additional V
bypass capacitors, near
LM2438 and V
CC
clamp diodes. Very important for arc
protection.
The routing of the LM2438 outputs to the CRT is very critical
to achieving optimum performance. Figure 13 shows the
routing and component placement from pin 1 of the LM2438
to the red cathode. Note that the components are placed so
that they almost line up from the output pin of the LM2438 to
the red cathode pin of the CRT connector. This is done to
minimize the length of the video path between these two
components. Note also that D16, D17, R21 and D9 are
placed to minimize the size of the video nodes that they are
attached to. This minimizes parasitic capacitance in the
video path and also enhances the effectiveness of the pro-
tection diodes. The anode of protection diode D17 is con-
nected directly to a section of the the ground plane that has
a short and direct path to the LM2438 ground pins. The cath-
ode of D16 is connected to V
very close to decoupling ca-
pacitor C53 (see Figure 13) which is connected to the same
section of the ground plane as D17. The diode placement
and routing is very important for minimizing the voltage
stress on the LM2438 during an arcover event. Lastly, notice
that S1 is placed very close to the red cathode and is tied di-
rectly to CRT ground.
DS101043-15
FIGURE 10. Waveform at Cathode with LM1279/243X Demo Board
www.national.com
7
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PDF描述 |
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| LM2439 | Monolithic Triple 9.5 ns CRT Driver |
| LM2439T | Monolithic Triple 9.5 ns CRT Driver |
| LM2450 | 220V Monolithic Triple Channel 7 MHz DC Coupled CRT DTV Driver |
| LM2452 | 220V Monolithic Triple Channel 17 MHz DC Coupled CRT DTV Driver |
| LM2452TB | 220V Monolithic Triple Channel 17 MHz DC Coupled CRT DTV Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2439 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple 9.5 ns CRT Driver |
| LM2439NS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Driver |
| LM2439T | 制造商:Rochester Electronics LLC 功能描述:MONOLITHIC TRP 9.5NS CRT DRVR - Bulk |
| LM2439T/NOPB | 功能描述:IC DRIVER MONOLITHIC TO-220-9 RoHS:是 類別:集成電路 (IC) >> PMIC - 顯示器驅(qū)動器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 顯示器類型:真空熒光 (VF) 配置:5 x 7（矩陣） 接口:串行 數(shù)字或字符:- 電流 - 電源:3.5mA 電源電壓:2.7 V ~ 3.6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-QSOP 包裝:帶卷 (TR) |
| LM2445 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple 7.5 ns CRT Driver |
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