Low Cost 100MHz Triple CRT Driver CORPORATION CVA2412AX FEATURES • • • • DESCRIPTION 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 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 Package Temperature CVA2412TAX T11A -20oC to +100oC CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC 11 9 VCC 11 VC C 10 VOUT COLLECTOR 8 COLLECTOR 9,6,3 Q1 EMITTER 7 VOUT EMITTER 6 2,5,10 COLLECTOR 5 VOUT 4 Q2 VBIAS EMITTER 3 COLLECTOR 1 Q3 2 1 VOUT VBIAS EMITTER 8,7,4 1N-12 TAB = GND TOP VIEW T11A PACKAGE GND TAB 1B-22 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2412AX CORPORATION ABSOLUTE MAXIMUM RATINGS Operating Temperature . . . . . . . . . . . . . . . . . -20oC to +100oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85V Storage Temperature . . . . . . . . . . . . . . . . . . . -25oC to +100oC DC ELECTRICAL CHARACTERISTICS TCASE = +25oC (see test circuit) SYMBOL CHARACTERISTICS MIN TYP MAX UNITS ICC Supply Current @ 1MHz 34 50 mA ICC Supply Current @ 50MHz 58 65 mA VOUT DC Output DC Level 40 45 50 V AV Gain 11 13 15 V MIN TYP MAX UNITS AC ELECTRICAL CHARACTERISTICS TCASE = +25oC SYMBOL CHARACTERISTICS Tr Rise Time 4 ns Tf Fall Time 4 ns Le Linearity 5 % OS Overshoot 100 MHz CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC 11 900 Ω 1 3,6,9 12V 11 CVA2412AX 2,5,10 33 Ω 10pF 4,7,8 50 Ω 65 Ω 120pF 1N-13 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 C2 120pF C2 120pF C2 120pF R4 56Ω 120Ω R13 R4 56Ω 120Ω R13 R4 56Ω 120Ω R1 65Ω Q1 2N3904 R1 65Ω Q1 2N3904 R1 65Ω Q1 2N3904 R2 DC bias circuit at the output is an example from several DC bias circuits available. Output Peaking inductor is approx. (220nH to 680nH). C1 120pF R3 56Ω 33Ω R2 C1 120pF R3 56Ω 33Ω R2 C1 120pF R3 56Ω 33Ω Gain = R5 R1 Overshoot affects the EMI, try to reduce overshoot as much as possible by adjusting R3, C1 R3, C1 network will adjust the overshoot. R4, C2 network will adjust the undershoot. NOTES: B-INPUT G-INPUT R-INPUT R13 900Ω 3W R5 900Ω 3W R5 900Ω 3W R5 12V 9 8 7 6 4 3 C3 .01µF C6 100µF TAB (HEAT SINK) 11 10 5 2 1 CVA2412AX 80V C7 33µF R7 2.2µF C8 .1µF FDH400 2.2µF D1 C4 5.6KΩ R7 FDH400 D1 C4 5.6KΩ R7 FDH400 2.2µF D1 C4 5.6KΩ D2 FDH400 D2 FDH400 D2 FDH400 R14 1.5KΩ R8 10KΩ R8 10KΩ R8 10KΩ C5 .1µF C5 .1µF C5 .1µF R10 1.5KΩ Q2 2N3904 R8 1.5KΩ R10 1.5KΩ Q2 2N3904 R9 1.5KΩ R10 1.5KΩ Q2 2N3904 R9 1.5KΩ R11 330nH L1 820Ω R11 330nH L1 820Ω R11 330nH L1 820Ω R12 47Ω R12 47Ω R12 47Ω 1N-14 B-OUTPUT G-OUTPUT R-OUTPUT CVA2412AX CORPORATION FIGURE 1. APPLICATION CIRCUIT CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 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