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CVA3404T

更新时间： 2024-01-07 08:00:16
品牌 Logo 应用领域
CALOGIC 驱动器
页数 文件大小 规格书
4页 59K
描述
Low Cost Triple CRT Driver

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CVA3404T 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SFM包装说明：T11A
针数：11Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.90.00.00
风险等级：5.92商用集成电路类型：VIDEO AMPLIFIER
JESD-30 代码：R-PSFM-T11信道数量：3
功能数量：1端子数量：11
最高工作温度：100 °C最低工作温度：-20 °C
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：FLANGE MOUNT峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified最大压摆率：26 mA
最大供电电压 (Vsup)：80 V最小供电电压 (Vsup)：80 V
表面贴装：NO技术：BIPOLAR
温度等级：OTHER端子形式：THROUGH-HOLE
端子位置：SINGLE处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

CVA3404T 数据手册

 浏览型号CVA3404T的Datasheet PDF文件第1页浏览型号CVA3404T的Datasheet PDF文件第2页浏览型号CVA3404T的Datasheet PDF文件第4页 
CVA3404T  
CORPORATION  
FIGURE 2.  
+80V  
VBIAS  
33  
Ω
R
L
CVA3404T  
91  
Ω
SPARK  
GAP  
VIDEO  
1P-31  
FIGURE 3.  
+80V  
1K  
C
L
VBIAS  
33  
Ω
CVA3404T  
R
VIDEO  
SPARK  
GAP  
V
cc  
CVA4501  
DC BIAS  
I.C.  
1P-32  
BIAS  
APPLICATION INFORMATION  
the PC Board that will result in quick EMI passage and better  
performance. The output peaking should be used only to  
restore the performance loss due to stray capacitances. Over  
peaking will cause excessive ringing that will have better  
results but poor EMI. The DC restore circuit is also important  
when considering the high frequency performance. Using  
CVA4501, DC Bias IC, better results can be obtained and  
high frequency performance can be maximixed.  
The CVA3404T is a high voltage triple CRT driver suitiable to  
drive 69kHz, 1280 x 1024 CRT displays. It features a high  
impedance input to match any pre-amplifier. The CVA3404T  
has a true class AB output stage that results in excellent gray  
scale linearity and consistent EMI performance.  
As with any high speed amplifier used in CRT display  
applications, specific precaution should be taken to get the  
required performance. Power supply should be by pass as  
close to the device pin as possible. Use 0.01µf very near to  
the device and a large capacitor of 10µf or more (preferable  
100µf) near the device. A 0.1µf and 10µf should be connected  
near the Vbias pin (#10). Arc protection is very essential. Fast  
diodes together with the spark gap will achieve sufficient  
protection. However, in certain applications depends on the  
tubes a high value of resistor is required to reduce the current  
into the CVA3404T during arcing. This will result in less than  
desireable performance some of which can be restored by  
using a peaking inductor at the output pin, Figure 2. Another  
way to achieve this is by using a RC network at the output of  
the device and use a peaking inductor at the tube, Figure 3.  
THERMAL CONSIDERATIONS  
Power supply current increases as the input signal increases  
and consequently power dissipation also increases.  
The CVA3404T cannot be used without heat sinking. Figure 4  
shows the power dissipated in each channel over the  
operating voltage range of the device. Under white screen  
conditions, i.e.: 25V output, dissipation increases to 9.5W  
total. The CVA3405T case temperature must be maintained  
below +100oC.  
If the maximum expected ambient  
temperature is +50oC, then a heat sink is needed with thermal  
resistance equal to or less than:  
(100 − 50oC)  
Rth  
=
= 5.3oC/W  
9.5W  
The rise and fall time of the CVA3404T may suffer due to  
stray capacitances associated with the PC Board and other  
components. It can be improved by carefully designing the  
PC Board where the output stage and input stage ground path  
are seperated. Calogic will assist customers in the layout of  
The CVA3404T maximum load is 600Ω to ground or V+.  
The output of CVA3404T is not short circuit proof. Any resistance  
to V+ or Ground should be > 600Ω.  
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025  
1234

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