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CVA2405のメーカーはCalogic LLCです、この部品の機能は「Low Cost Triple CRT Driver」です。 |
部品番号 | CVA2405 |
| |
部品説明 | Low Cost Triple CRT Driver | ||
メーカ | Calogic LLC | ||
ロゴ | |||
このページの下部にプレビューとCVA2405ダウンロード(pdfファイル)リンクがあります。 Total 4 pages
CORPORATION
Low Cost
Triple CRT Driver
CVA2405T
FEATURES
• Rise/Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0ns
• Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65VP-P
• Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V
• Excellent Gray Scale Linearity
• Consistent EMI Performance
APPLICATIONS
• CRT driver for up to 69kHz monitors with resolution up
to 1280 x 1024.
• Excellent Gray Scale Linearity
DESCRIPTION
The CVA2405T contains three high impedance wideband
amplifiers, designed specifically to drive a CRT. It features no
crossover distortion for excellent gray scale linearity. This device
can drive monitors with resolutions of 1280 x 1024
(non-interlaced) with pixel frequency of 160MHz.
The part is housed in the industry standard 11-lead TO-220
molded power package. The heat sink is grounded.
ORDERING INFORMATION
Part Package
CVA2405T
T11A
Temperature
-20oC to +100oC
CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC
11
VIN 1
10
VBIAS
9
VIN 2
8
VIN 3
7
GND
6
VCC
5
VOUT 3
4
GND
3
VOUT2
2
GND
1
VOUT 1
TOP VIEW
T11A PACKAGE
GND = TAB
1P-12
VCC
9
R1
VBIAS
10
R6
VIN
11,9,8
R4
VOUT
1,3,5
R5
R1
R3
R2
TAB = GND
2,4,7
1P-13
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
1 Page CORPORATION
CVA2405T
FIGURE 2.
+80V
VBIAS
VIDEO
CVA2405T
LR
91Ω
33Ω
SPARK
GAP
1P-15
FIGURE 3.
+80V
VBIAS
VIDEO
CVA2405T
1K
L
33Ω
R
C
CVA4501
Vcc
SPARK
GAP
DC BIAS
I.C.
1P-16
BIAS
APPLICATION INFORMATION
The CVA2405T 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 CVA2405T
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 CVA2405T 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.
The rise and fall time of the CVA2405T 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 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.
THERMAL CONSIDERATIONS
Power supply current increases as the input signal increases
and consequently power dissipation also increases.
The CVA2405T 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 10.8W
total. The CVA2405T 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:
Rth
=
(100 − 50oC)
10.8W
=
4.6oC/W
The CVA2405T maximum load is 600Ω to ground or V+.
The output of CVA2405T 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
3Pages | |||
ページ | 合計 : 4 ページ | ||
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PDF ダウンロード | [ CVA2405 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
CVA2400 | Low Cost Triple CRT Driver | Calogic LLC |
CVA2400 | Low Cost Triple CRT Driver | Calogic LLC |
CVA2400A | Low Cost Triple CRT Driver | Calogic LLC |
CVA2400T | Low Cost Triple CRT Driver | Calogic LLC |