CALOGIC CVA2400 Low cost triple crt driver Datasheet

Low Cost
Triple CRT Driver
CORPORATION
Preliminary Data Sheet
CVA2400A
DESCRIPTION
FEATURES
•
•
•
Rise/Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0ns
Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65VP-P
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V
APPLICATIONS
•
•
•
•
CRT driver for up to 76kHz Monitors
Excellent Gray Scale Linearity
Emitter Peaking Option
Adjustable Gain
The CVA2400A contains three wide band triple amplifiers,
specifically designed to drive a CRT. It features no crossover
distortion for excellent gray scale linearity, external emitter
peaking to maximize the high frequency gain at the cross hatch
pattern and an adjustable gain for ease of use. This device can
drive monitors with resolutions of 1280 X 1024 (interlaced) with
pixel frequencies of 176MHz.
The part is housed in the industry standard 11-lead TO-220
molded power package. The heat sink is grounded.
ORDERING INFORMATION
Part
Package
Temperature
CVA2400A
T11A
0oC to +110oC
CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC
VCC
9
11
10
9
8
VOUT 1
VCC
VOUT 3
7
6
5
4
3
2
1
VBIAS
VOUT
11,10,8
Gain/Peaking 3
Control
VIN 3
Gain/Peaking
2
Control
VIN 2
Gain/Peaking
1
Control
VIN 1
VBIAS
50W
7
VIN
1,3,5
GND = TAB
TOP VIEW
T11A PACKAGE
R1 = 1200W
VOUT 2
1N-22
2,4,6
Gain/Peaking
Control
GND
TAB
1Q-42
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2400A
CORPORATION
ABSOLUTE MAXIMUM RATINGS
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V
Storage Temperature . . . . . . . . . . . . . . . . . . . -25oC to +125oC
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +175oC
Case Temperature . . . . . . . . . . . . . . . . . . . . . . . 0oC to +110oC
Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC
DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.2V, VOUT = 50Vp-p. TCASE = +25oC.
See Figure 1.
SYMBOL
CHARACTERISTICS
MIN
TYP
MAX
UNITS
Icc
Supply Current
30
35
40
mA
VOUT DC
Output DC Level
40
45
50
V
Av
Voltage Gain
14
14.4
15
V
RIN
Input Impedance
10,000
12,000
20,000
Ω
0.2
0.7
dB
Gain Matching
AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.2V, VOUT = 45Vp-p. TCASE = +25oC.
See Figure 1.
SYMBOL
CHARACTERISTICS
MIN
TYP
MAX
UNITS
Tr
Rise Time
6
7
ns
Tf
Fall Time
4.5
5.5
ns
Le
Linearity
6
OS
Overshoot
3
%
7
%
FIGURE 1. TEST CIRCUIT
VCC 9
C3
D1
VBIAS
C1
C4
7
CVA2400A
C2
VIN
VIDEO
INPUT
1,3,5
C7
C1 = 0.01m F
C2 = 100m F
C3 = 0.1m F
C7 = 40pF (TYP)
R1
11,10,8
C6
D2
VP G
2,4,6
R2
VOUT
TEKTRONIX
FET PROBE
MODEL 6201
(CAP. 1.5pF)
GND
TAB
C4 = 100m F
C6 = 8pF
W
W
R1 = 82
R2 = 15
D1, D2 = FHD400
1Q-43
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2400A
CORPORATION
FIGURE 2. APPLICATION CIRCUIT
VCC 9
C3
VBIAS
R3
C1
D1
7
C2
CVA2400A
5,3,1
11,10,8
C5
R1
SPARK
GAP
DC BIAS
GND
TAB
R1 = 82W
R2 = 15W
R3 = 47W
R4 = 47(1/2W)W
R5 = 820W
APPLICATION INFORMATION
C1 = 0.01m F
C2 = 100m F
C3 = 0.1m F
C4 = 100m F
C5 = 2.2m F
C7 = 40 - 120pf
D1, D2 = FHD400
L = 150 - 330nH
1Q-44
FIGURE 3. CVA2400A DC Characteristics
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:
OUTPUT VOLTAGE (V)
Thermal Considerations
110
100
90
80
70
60
50
40
30
20
10
5
4
3
VOLTAGE
POWER
2
1
0
1
2
3
4
5
INPUT VOLTAGE
6
POWER DISSIPATION (W)
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.
Rth =
R4
R5
D2
VPG
6,4,2
R2
C7
L
VOUT
VIN
VIDEO
INPUT
C4
7
1Q-45
(100 − 50oC)
= 4.5oC/W
11W
The CVA2400A maximum load is 600Ω to ground or V+.
The output of CVA2400A 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
CVA2400A
CORPORATION
TYPICAL CHARACTERISTICS
VOUT vs FREQUENCY vs I CC
50
90
VOUT
40
80
35
70
60
30
I CC
25
50
20
40
15
30
10
20
5
10
0
100
0
1
10
20
30
40
50
70
80
I CC (mA)
VOUT (VP-P)
45
90
1Q-48
FREQUENCY (MHz)
VOUT vs VIN vs I CC
80
80
70
VOUT
60
60
50
50
40
40
30
30
I CC
20
20
10
0
I CC (mA)
V OUT (V)
70
10
0
0.5
1.0
1.5
2.0
2.5
3.0
VIN (VOLTS)
3.5
4.0
4.5
5.0
5.5
0
6.0
1Q-47
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2400A
CORPORATION
TYPICAL CHARACTERISTICS (continued)
RISE TIME
FALL TIME
10V/DIV
6.25V
10V/DIV
6.25V
-3.75V
-40ns
160ns
20ns/DIV
-3.75V
-40ns
160ns
20ns/DIV
1S-32
CROSS HATCH
WHITE BACKGROUND
1S-33
CROSS HATCH
BLACK BACKGROUND
10V/DIV
7.25V
10V/DIV
7.25V
-2.75V
2.4ns
202.4ns
20ns/DIV
1S-35
-2.75V
-47.6ns
152.4ns
20ns/DIV
1S-34
Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
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