CVA2400 Ver la hoja de datos (PDF) - Calogic, LLC
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Fabricante
CVA2400 Datasheet PDF : 5 Pages
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CORPORATION
CVA2400A
FIGURE 2. APPLICATION CIRCUIT
VBIAS
C1
VCC 9
C3
C4
R3
7
D1
L
C2
CVA2400A
VOUT
11,10,8
VIN
R4
C5
R5
VIDEO 5,3,1
INPUT
VPG
6,4,2
D2
DC BIAS
SPARK
GAP
R2
GND
C7
R1 TAB
R1 = 82W
R2 = 15W
R3 = 47W
R4 = 47(1/2W)W
R5 = 820W
C1 = 0.01mF
C2 = 100mF
C3 = 0.1mF
C4 = 100mF
C5 = 2.2mF
C7 = 40 - 120pf
D1, D2 = FHD400
L = 150 - 330nH
1Q-44
APPLICATION INFORMATION
The CVA2400A is a high voltage triple CRT driver suitable for
VGA, Super VGA, IBM® 8514, and 1280 x 1024
non-interlaced display applications. The CVA2400A features
80V operation. The part is housed in the industry standard 11
lead TO-220 molded power package. The heat sink is
grounded for ease of manufacturing and RFI shielding.
Thermal Considerations
The transfer characteristics of the amplifier are shown in
Figure 2. Since this is a class A input stage, power supply
current increases as the input signal increases and
consequently power dissipation also increases.
The CVA2400A cannot be used without heat sinking. Figure 3
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 11W total.
The CVA2400A 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)
11W
=
4.5oC/W
The CVA2400A maximum load is 600Ω to ground or V+.
The output of CVA2400A is not short circuit proof. Any
resistance to V+ or Ground should be > 600Ω.
FIGURE 3. CVA2400A DC Characteristics
110
100
5
90
80
4
70
60
3
50
VOLTAGE
POWER
40
2
30
20
1
10
01234567
INPUT VOLTAGE
1Q-45
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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