cva2401t Calogic, LLC, cva2401t Datasheet - Page 3

• Manufacturer Part Number: cva2401t
• Description: Low Cost Triple Crt Driver
• Manufacturer: Calogic, LLC

APPLICATION INFORMATION
The CVA2401T is a high voltage triple CRT driver suitable for
VGA, Super VGA, IBM
non-interlaced display applications. The CVA2401T features
80V operation. The part is housed in the industry standard 11
lead TO-220 molded power package.
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
temperature is +50
resistance equal to or less than:
The CVA2401T maximum load is 600 to ground or V
The output of CVA2401T is not short circuit proof. Any resistance
to V
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone], FAX: [phone]
CORPORATION
FIGURE 2. APPLICATION CIRCUIT
R
th
+
or Ground should be > 600 .
+100
100
13.2W
o
C.
50
o
V
C
o
BIAS
C1
C, then a heat sink is needed with thermal
If the maximum expected ambient
3.8
®
8514, 1280 x 1024 and 1024 x 768
o
C/W
R3
VIDEO
INPUT
C2
C7
R2
1,3,5
V
CC
V
7
IN
The heat sink is
9
CVA2401T
V
2,4,6
R1
PG
+
GND
TAB
.
R1 = 68
R2 = 20
R3 = 47
R4 = 47(1/2W)
R7 = 33
R8 = 39
R10 = 680
11,10,8
V
OUT
D1
9
9
9
9
9
9
D2
C3
FIGURE 3. CVA2401T DC Characteristics
9
C5
DC BIAS
120
110
100
C1 = 0.01 m F
C2 = 100 m F
C3 = 0.1 m F
C4 = 100 m F
C5 = 2.2 m F
C7 = 40 - 120pf
90
80
70
60
50
40
30
20
10
0
R5
L
VOLTAGE
C4
1
R4
2
INPUT VOLTAGE
D1, D2 = FHD400
L = 330 - 390nH
3
SPARK
GAP
POWER
4
5
1Q-36
6
CVA2401T
7
6
5
4
3
2
1
1S-36