CVA2401 데이터 시트보기 (PDF) - Calogic, LLC
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CVA2401 Datasheet PDF : 5 Pages
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CORPORATION
CVA2401T
FIGURE 2. APPLICATION CIRCUIT
VBIAS
C1
VCC 9
C3
C4
R3
7
D1
L
C2
CVA2401T
VOUT
11,10,8
VIN
R4
C5
R5
VIDEO 1,3,5
INPUT
VPG
2,4,6
D2
DC BIAS
R2
GND
C7
R1 TAB
SPARK
GAP
R1 = 68W
R2 = 20W
R3 = 47W
R4 = 47(1/2W)W
R7 = 33W
R8 = 39W
R10 = 680W
C1 = 0.01mF
C2 = 100mF
C3 = 0.1mF
C4 = 100mF
C5 = 2.2mF
C7 = 40 - 120pf
D1, D2 = FHD400
L = 330 - 390nH
1Q-36
APPLICATION INFORMATION
The CVA2401T is a high voltage triple CRT driver suitable for
VGA, Super VGA, IBM® 8514, 1280 x 1024 and 1024 x 768
non-interlaced display applications. The CVA2401T 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 3. Since this is a class A input stage, power supply
current increases as the input signal increases and
consequently power dissipation also increases.
The CVA2401T 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 13.2W
total. The CVA2401T 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)
13.2W
=
3.8oC/W
The CVA2401T maximum load is 600Ω to ground or V+.
The output of CVA2401T is not short circuit proof. Any resistance
to V+ or Ground should be > 600Ω.
FIGURE 3. CVA2401T DC Characteristics
120
6
110
100
5
90
80
4
70
60
3
VOLTAGE
POWER
50
40
2
30
20
1
10
01234567
INPUT VOLTAGE
1S-36
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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