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Low Cost 100MHz Triple CRT Driver
CORPORATION
CVA2412AX
FEATURES DESCRIPTION The CVA2412AX is a very low cost solution for high resolution monitors. The device can be used with pre-amps, where the common emitter transistor is already a part of the pre-amp. With this device, OSD, peaking coil, and peaking capacitor options are available. A very small heat sink is required to pick-up ground from the standard TO220 package Tab. With 100MHz bandwidth, the device is an ideal low cost solution for 17" and 21" monitors. ORDERING INFORMATION Part CVA2412TAX Package T11A Temperature -20oC to +100oC
* * * * *
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100MHz Ease of Use EMI Control Option OSD Option
APPLICATIONS CRT Driver for up to 82kHz Monitors with Resolution up to 1280 x 1024
CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC
11 10 9 8 EMITTER 7 EMITTER 6 COLLECTOR 5 4 3 COLLECTOR 2 1 VOUT VBIAS VOUT
EMITTER
VC C VOUT COLLECTOR
VCC 11 COLLECTOR 9,6,3
Q1 VOUT 2,5,10
Q2
VBIAS
1
Q3
EMITTER 8,7,4
GND TAB
1N-12
TAB = GND TOP VIEW T11A PACKAGE
1B-22
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CVA2412AX
CORPORATION
ABSOLUTE MAXIMUM RATINGS Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85V Storage Temperature . . . . . . . . . . . . . . . . . . . -25oC to +100oC Operating Temperature . . . . . . . . . . . . . . . . . -20oC to +100oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC
DC ELECTRICAL CHARACTERISTICS TCASE = +25oC (see test circuit)
SYMBOL ICC ICC VOUT DC AV CHARACTERISTICS Supply Current @ 1MHz Supply Current @ 50MHz Output DC Level Gain 40 11 MIN TYP 34 58 45 13 MAX 50 65 50 15 UNITS mA mA V V
AC ELECTRICAL CHARACTERISTICS TCASE = +25oC
SYMBOL Tr Tf Le OS Rise Time Fall Time Linearity Overshoot CHARACTERISTICS MIN TYP 4 4 5 100 MAX UNITS ns ns % MHz
CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC
11 900 1 12V 3,6,9 11 CVA2412AX 33 4,7,8 2,5,10
10pF
50 65 120pF
1N-13
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CORPORATION
CVA2412AX 1 5.6K R11 820 47 L1 330nH R-OUTPUT R9 1.5K R8 10K Q2 2N3904 R10 1.5K D2 FDH400 C5 .1F R12 2 C4 3 2.2F D1 FDH400 R7 5.6K R11 R9 1.5K L1 330nH R8 10K Q2 2N3904 R10 1.5K D2 FDH400 C5 .1F 820 6 C4 2.2F D1 8 FDH400 R7 5.6K 10 C4 11 R2 33 FDH400 TAB (HEAT SINK) C6 100F R14 1.5K R3 56 C1 120pF D2 FDH400 2.2F D1 R8 10K C5 .1F R8 1.5K Q2 2N3904 R10 1.5K R11 820 L1 330nH R12 47 B-OUTPUT R5 R3 56 900 3W C1 120pF 9 7 R2 33 R12 47 G-OUTPUT 4 5 R5 C1 120pF 900 3W R5 R2 33 R3 56 900 3W R7
FIGURE 1. APPLICATION CIRCUIT
R13
R-INPUT
120
Q1 2N3904
C2 120pF
R1 65
R4 56
R13
G-INPUT
120
Q1 2N3904
C2 120pF
R1 65
R4 56
R13
B-INPUT
120
Q1 2N3904
C2 120pF R4 56
R1 65
NOTES: C3 .01F 80V
C7 33F
C8 .1F
R4, C2 network will adjust the undershoot.
R3, C1 network will adjust the overshoot.
Gain = R5 R1 Overshoot affects the EMI, try to reduce overshoot as much as possible by adjusting R3, C1 12V
Output Peaking inductor is approx. (220nH to 680nH).
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
1N-14
CVA2412AX
DC bias circuit at the output is an example from several DC bias circuits available.
CVA2412AX
CORPORATION
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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