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CVA1405TのメーカーはCalogic LLCです、この部品の機能は「Triple CRT Driver」です。 |
部品番号 | CVA1405T |
| |
部品説明 | 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CVA1405Tダウンロード(pdfファイル)リンクがあります。 Total 4 pages
CORPORATION
Triple CRT Driver
Preliminary Product Information
CVA1405T
FEATURES
• Rise/Fall Time (at the Cathode) . . . . . . . . . . . . . . . . 9.0ns
• Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65VP-P
• Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V
• Pin to Pin Compatible to CVA2404T
APPLICATIONS
• CRT driver for up to 64kHz monitors with resolution up
to 1024 x 768
DESCRIPTION
The CVA1405T contains three wideband amplifiers, designed
specifically to drive a CRT. The device can drive monitors with
resolutions up to 1024 x 768 (non-interlaced).
The product is housed in the industry standard 11 lead
TO-220 molded power package.
ORDERING INFORMATION
Part Package
CVA1405T
T11A
Temperature
-20oC to +100oC
CONNECTION DIAGRAM
11
10
9
8
7
6
5
4
3
2
1
TOP VIEW
T11A PACKAGE
VIN 1
VB IA S
VIN 2
VIN 3
GND
VCC
VOUT 3
GND
VOUT 2
GND
VOUT 1
1L-38
VBIAS
10
VIN
11,9,8
VCC
6
VO
1,3,5
7,4,2,TAB
1T-18B
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
1 Page CORPORATION
CVA1405T
FIGURE 2.
+80V
VBIAS
VIDEO
CVA1405T
LR
919
339
SPARK
GAP
1T-39
FIGURE 3.
+80V
VBIAS
VIDEO
CVA1405T
1K
L 339
R
C
CVA4502
Vcc
SPARK
GAP
DC BIAS
I.C.
1T-46
BIAS
APPLICATION INFORMATION
The CVA1405T is a high voltage triple CRT driver suitiable to
drive 69kHz, 1024 x 768 CRT displays. It features a high
impedance input to match any pre-amplifier. The CVA1405T
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 CVA1405T 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 CVA1405T 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
CVA4502, 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 CVA1405T cannot be used without heat sinking. The
calculations below 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 8.1W total. The CVA1405T 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)
8.1W
=
6.2oC/W
The output of CVA2405T is not short circuit proof.
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 | [ CVA1405T 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 |
CVA1405T | Triple CRT Driver | Calogic LLC |