CALOGIC CVA2422

Low Cost
Triple CRT Driver
CORPORATION
CVA2422TL
FEATURES
DESCRIPTION
•
•
•
•
The CVA2422TL contains three cascode video driver amplifiers
without a common emitter. This device is designed for ease of
use, adjustable gain, controlled EMI, OSD, and external peaking.
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90MHz
Rise/Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0ns
Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70VP-P
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V
APPLICATIONS
•
CRT driver for up to 82kHz monitors with resolution up
to 1280 x 1024.
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 manufacturing and RFI shielding.
ORDERING INFORMATION
Part
Package
Temperature
CVA2422TL
T11A
-20oC to +90oC
CONNECTION DIAGRAM
VCC
11
11
V+
10
9
VBIAS 3
8
7
VIN 3
12Ω
VBIAS 2
6
5
R1 = 1000 Ω
VOUT 3
VO
3,4,10
VIN 2
GND
4
3
2
1
12Ω
VOUT 2
VOUT 1
VB
VBIAS 1
VIN 1
2,7,9
Vin
TOP VIEW
T11A PACKAGE
1C-46
1,6,8
GND
5
1D-18
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2422TL
CORPORATION
ABSOLUTE MAXIMUM RATINGS
Operating Temperature . . . . . . . . . . . . . . . . . . -20oC to +90oC
Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95V
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16W
Storage Temperature . . . . . . . . . . . . . . . . . . . -25oC to +100oC
DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.4V, VOUT = 50Vp-p. TCASE = +25oC.
See Figure 1.
SYMBOL
CHARACTERISTICS
MIN
TYP
MAX
UNITS
40
mA
Icc
Supply Current @ 1MHz
34
Icc
Supply Current @ 50MHz
58
VOUT DC
Output DC Level
40
45
50
V
Av
Voltage Gain
12
15
17
V
Gain Matching
mA
0.2
dB
AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.4V, VOUT = 50Vp-p. TCASE = +25oC.
See Figure 1.
SYMBOL
CHARACTERISTICS
MIN
TYP
MAX
UNITS
Tr
Rise Time
5
6
ns
Tf
Fall Time
5
6
ns
BW
Bandwidth
90
MHz
Le
Linearity
6
%
OS
Overshoot
6
%
FIGURE 1. TEST CIRCUIT
VCC 11
C3
R3
D1
VBIAS
2,7,9
C1
CVA2422TL
C2
C4
VIN
VOUT
3,4,10
C5
1,6,8
R4
C6
D2
Q1
R2
GND 5
R1
VIDEO
INPUT
C1 = 0.01 µF
C2 = 100 µF
C3 = 0.1 µF
C4 = 100 µF
C5 = 2.2 µF
C6 = 8pF (INCLUDING
PARASITIC)
R1 = 62
R2 = 120
R3 = 180
R4 = 47
Q1 = 2N3904
D1, D2 = FHD400
1G-30
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2422TL
CORPORATION
FIGURE 2. APPLICATION CIRCUIT
VCC 11
C3
R3
VBIAS
D1
2,7,9
C1
C2
VOUT
CVA2422TL
R6
C4
3,4,10
C5
VIN
R4
D2
1,6,8
SPARK
GAP
R7
R9
Q2
GND 5
Q1
C6
R5
R1
C7
VIDEO INPUT
Tr,Tf = <4ns
R1 = 62 Ω
R2 = 62 Ω
R3 = 180 Ω
R4 = 47(1/2W) Ω
R5 = 120 Ω
R6 = 7.5K Ω
R7 = 33 Ω
R8 = 39 Ω
R9 = 56 Ω
R2
R8
OSD
C1 = 0.01 µF
C2 = 100 µF
C3 = 0.1 µF
C4 = 100 µF
C5 = 2.2 µF
C6 = 40 - 120pf
C7 = 40 - 120pf
Q1 = 2N3904
Q2 = 2N3904
D1, D2 = FHD400
1G-31
FIGURE 3. APPLICATION CIRCUIT
VCC 11
C3
R3
VBIAS
D1
2,7,9
C1
C2
CVA2422TL
R6
C4
L
VOUT
3,4,10
C5
VIN
R4
R10
D2
1,6,8
SPARK
GAP
R7
R9
Q2
GND 5
Q1
C6
R5
C7
VIDEO INPUT
Tr,Tf = <4ns
R8
R1
R2
OSD
R1 = 62 Ω
R2 = 62 Ω
R3 = 180 Ω
R4 = 47(1/2W) Ω
R5 = 120 Ω
R6 = 7.5K Ω
R7 = 33 Ω
R8 = 39 Ω
R9 = 56 Ω
R10 = 680 Ω
C1 = 0.01 µF
C2 = 100 µF
C3 = 0.1 µF
C4 = 100 µF
C5 = 2.2 µF
C6 = 40 - 120pf
C7 = 40 - 120pf
Q1 = 2N3904
Q2 = 2N3904
D1, D2 = FHD400
L = 330 - 390nH
1G-32
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2422TL
CORPORATION
APPLICATION INFORMATION
FIGURE 4. CVA2422TL DC Characteristics
The transfer characteristics of the amplifier are shown in
Figure 4. Since this is a class A input stage, power supply
current increases as the input signal increases and
consequently power dissipation also increases.
The CVA2422TL cannot be used without heat sinking. Figure
2 shows the power dissipated in each channel over the
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 +90oC. If the maximum expected ambient temperature
is +50oC, then a heat sink is needed with thermal resistance
equal to or less than:
Rth =
(90 − 50oC)
16W
OUTPUT VOLTAGE (VOLTS)
Thermal Considerations
6
110
100
90
80
70
60
50
40
30
20
10
5
4
VOLTAGE
POWER
3
2
1
0
1
2
3
4
5
INPUT VOLTAGE
6
POWER DISSIPATION (WATTS)
The CVA2422TL 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 CVA2422TL features
80V operation. 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 manufacturing and RFI
shielding.
7
1G-26
= 2.5oC/W
The CVA2422TL maximum load is 600Ω to ground or V+.
The output of CVA2422TL is not short circuit proof.
resistance to V+ or Ground should be > 600Ω.
Any
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2422TL
CORPORATION
TYPICAL CHARACTERISTICS
RISE TIME
FALL TIME
WITH PEAKING
INDUCTOR & CAPACITOR
WITH PEAKING
INDUCTOR & CAPACITOR
8V/DIV
30V
8V/DIV
30V
10V
10V
10ns/DIV
10ns/DIV
1D-02
RISE TIME
FALL TIME
WITH PEAKING
CAPACITOR (NO INDUCTOR)
WITH PEAKING
CAPACITOR (NO INDUCTOR)
8V/DIV
90V
8V/DIV
90V
1D-03
10V
10V
10ns/DIV
10ns/DIV
1D-04
NO PEAKING
INDUCTOR OR CAPACITOR
120.5V
120.5V
10V/DIV
FALL TIME
NO PEAKING
INDUCTOR OR CAPACITOR
10V/DIV
RISE TIME
2.5V
1D-05
2.5V
10ns/DIV
1D-06
10ns/DIV
1D-07
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025