Page 1
Low Cost
Triple CR T Driver
CVA2422TL
CORPORATION
FEATURES
•• Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90MHz
•• Rise/Fall Ti me. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0ns
•• Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70V
P-P
•• Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V
APPLICATIONS
•• CRT driver for up to 82kHz monitor s with resolutio n up
to 12 80 x 1 02 4.
CONNECTION DIAGRAM
11
10
9
8
7
6
5
4
3
2
1
V
OUT 3
V
IN 3
V
IN 2
V
OUT 2
V
BIAS 1
V+
V
BIAS 3
V
BIAS 2
GND
V
OUT 1
V
IN 1
DESCRIPTION
The CVA2422TL contains three cascode video driver ampli fiers
without a common e mitte r. This device is de si gned f or ease of
use, adjustable gain, controlled EMI, OSD, and external peaking.
The part is housed in the industry standard 11-lead TO-220
molded power package. The heat sink is floating and may be
grounded for ease of manufact uring and RFI shield ing.
ORDERING INFORMATION
Part Package Temperature
o
V
O
3,4,10
C to +90oC
CVA2422TL T11A -20
V
CC
11
R
= 1000
V
B
2,7,9
Ω
12
Ω
12
Ω
1
V
TOP VIEW
T11A PACKAGE
1C-46
in
1,6,8
GND
5
1D-18
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-290 0, FAX: 510-651-3025
Page 2
CORPORATION
ABSOLUTE MAXIMUM RATINGS
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95V
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16W
Storage Tempera tu re. . . . . . . . . . . . . . . . . . . -25
o
C to +100oC
CVA2422TL
Operating Temperature . . . . . . . . . . . . . . . . . . -20
Lead Temperat ure . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300
o
C to +90oC
o
C
DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DC
INPUT BIAS
= 12V, VIN = 3.4V, V
OUT
= 50V
p-p
. T
CASE
= +25oC.
See Figure 1.
SYMBOL CHARACTERISTICS MIN TYP MAX UNITS
I
cc
I
cc
V
OUT DC
A
v
AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DC
Supply Current @ 1MHz 34 40 mA
Supply Current @ 50MHz 58 mA
Output DC Level 40 45 50 V
Voltage Gain 12 15 17 V
Gain Matc h ing 0.2 dB
INPUT BIAS
= 12V, VIN = 3.4V, V
OUT
= 50V
p-p
. T
CASE
= +25oC.
See Figure 1.
SYMBOL CHARACTERISTICS MIN TYP MAX UNITS
T
r
T
f
BW Bandwidth 90 MHz
L
e
OS Overshoot 6 %
Rise Time 5 6 ns
Fall Time 56ns
Linearity 6%
FIGURE 1. TEST CIRCUIT
V 11
CC
C4C3
R3
C2C1
V
BIAS
2,7,9
1,6,8
V
CVA2422TL
IN
D1
V
OUT
3,4,10
D2
C5
R4
C6
Q1
R2
GND 5
R1
VIDEO
INPUT
C1 = 0.01 µF
C2 = 100 µF
C3 = 0.1µF
C4 = 100 µF
C5 = 2.2µF
C6 = 8pF (INCLUDING
PARASITIC)
R1 = 62
R2 = 120
R3 = 180
R4 = 47
Q1 = 2N3904
D1, D2 = FHD400
1G-30
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-290 0, FAX: 510-651-3025
Page 3
CVA2422TL
FIGURE 2. APPLICATION CIRCUI T
R9
C6
VIDEO INPUT
Tr,Tf = <4ns
C7
R5
R8
R3
V
C2C1
R6
R7
Q2
R1 R2
V 11
CC
BIAS
2,7,9
V
IN
1,6,8
Q1
CVA2422TL
GND 5
OSD
D1
V
OUT
3,4,10
D2
R1 = 62Ω
R2 = 62Ω
R3 = 180
Ω
R4 = 47(1/2W) Ω
R5 = 120 Ω
R6 = 7.5K Ω
R7 = 33Ω
R8 = 39Ω
R9 = 56Ω
R4
C5
C1 = 0.01 µF
C2 = 100 µF
C3 = 0.1µF
C4 = 100 µF
C5 = 2.2µF
C6 = 40 - 120pf
C7 = 40 - 120pf
CORPORATION
C4C3
SPARK
GAP
Q1 = 2N3904
Q2 = 2N3904
D1, D2 = FHD400
1G-31
FIGURE 3. APPLICATION CIRCUI T
R9
C6
VIDEO INPUT
Tr,Tf = <4ns
R5
C7
R8
V 11
R3
V
2,7,9
C2C1
R6
1,6,8
R7
Q2
R1 R2
CC
BIAS
V
IN
Q1
CVA2422TL
GND 5
OSD
D1
V
OUT
3,4,10
D2
R1 = 62Ω
R2 = 62Ω
R3 = 180
Ω
R4 = 47(1/2W) Ω
R5 = 120 Ω
R6 = 7.5K Ω
R7 = 33Ω
R8 = 39Ω
R9 = 56Ω
R10 = 680 Ω
C5
R10
C1 = 0.01 µF
C2 = 100 µF
C3 = 0.1µF
C4 = 100 µF
C5 = 2.2µF
C6 = 40 - 120pf
C7 = 40 - 120pf
C4C3
L
R4
SPARK
GAP
Q1 = 2N3904
Q2 = 2N3904
D1, D2 = FHD400
L = 330 - 390nH
1G-32
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-290 0, FAX: 510-651-3025
Page 4
CORPORATION
CVA2422TL
APPLICATION INFORMATION
The CVA 2 422TL is a high volt age triple CR T driver suitable for
VGA, Super VGA, IBM
®
8514, 1280 x 1024 and 1024 x 768
non-interlaced display applications. The CVA2422TL features
80V operation. The part is housed in the industry standa rd 11
lead TO-220 mo lded p ower package. The he at sink is flo at in g
and may be grounded for ease of manufacturing and RFI
shielding.
Thermal Considerati ons
The transfer characteristics of the amplifier are shown in
Figure 4.
Since this is a cl ass A input stage, power supply
current increases as the input signal increases and
consequently power dissipation also increase s.
The CVA2422TL cannot be used without heat sinking.
shows the power dissipated in each channel over the
2
Figure
operating voltage range of the device. Under white screen
conditions, i.e.: 20V output, dissipation increases to 16W
total. The CVA2422TL case temperature must be maintained
below +90
is +50
o
C. If the maximum expected ambient temperature
o
C, then a heat sink is needed with thermal resistance
equal to or less than:
(90 − 50
=
R
th
The CV A2422TL maxim um load is 600 Ω to ground or V
The output of CVA2422TL is not short circuit proof. Any
resistance to V
o
C)
16W
= 2.5oC/W
+
or Ground should be > 60 0Ω.
+
.
FIGURE 4. CVA2422 TL DC Characterist ics
110
100
90
80
70
60
50
40
30
20
OUTPUT VOLTAGE (VOLTS)
10
0
1462
VOLTAGE POWER
357
INPUT VOLTAGE
6
POWER DISSIPATION (WATTS)
5
4
3
2
1
1G-26
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-290 0, FAX: 510-651-3025
Page 5
CVA2422TL
TYPICAL CHARACTERISTIC S
WITH PEAKING
30V
INDUCTOR & CAPACITOR
RISE TIME
30V
FALL TIME
WITH PEAKING
INDUCTOR & CAPACITOR
CORPORATION
8V/DIV
10V
90V
8V/DIV
10V
120.5V
10ns/DIV
RISE TIME
WITH PEAKING
CAPACITOR (NO INDUCTOR)
10ns/DIV
RISE TIME
NO PEAKING
INDUCTOR OR CAPACITOR
1D-02
1D-04
8V/DIV
10V
90V
8V/DIV
10V
120.5V
10ns/DIV
FALL TIME
WITH PEAKING
CAPACITOR (NO INDUCTOR)
10ns/DIV
FALL TIME
NO PEAKING
INDUCTOR OR CAPACITOR
1D-03
1D-05
10V/DIV
2.5V
10ns/DIV
1D-06
10V/DIV
2.5V
10ns/DIV
1D-07
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-290 0, FAX: 510-651-3025
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