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| Improved Triple 75MHz CRT Driver CORPORATION CVA2415TZ FEATURES DESCRIPTION The CVA2415TZ is an improved version that features excellent gray scale linearity with no crossover distortion and less EMI. Designed especially to drive high resolution monitor for resolution up to 1280 x 1024 (non-interlaced). 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 CVA2415TZ Package T11A Temperature -20oC to +100oC * Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75MHz * Fall Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2ns * RiseTime.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 505.0ns VP-P * Swing . . * Excellent Gray Scale Linearity Voltage . . . . . . . . . . . . . . . . * SupplyPin Compatible. .with .CVA2415T. . . . . . . . . . . . 80V * Pin to * CRT Driver for 1280 x 1024 and 1024 x 768 Color Monitors APPLICATIONS CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC V+ 11 10 9 8 7 6 5 4 3 2 1 V+ VOUT 3 BIAS 3 (12V) VIN 3 BIAS 2 (12V) VIN 2 GND VOUT 2 VOUT 1 BIAS 1 (12V) VIN 1 11 VOUT 3,4,10 VBIAS 2,7,9 VIN 1,6,8 PIN 1 DESIGNATOR T11A 1H-32 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2415TZ CORPORATION ABSOLUTE MAXIMUM RATINGS Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V Storage Temperature . . . . . . . . . . . . . . . . . . -25oC to +100oC Operating Temperature . . . . . . . . . . . . . . . . -20oC to +100oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC DC ELECTRICAL CHARACTERISTICS VS = 80V, CL = 12pF, Vbias = 12V, Vin = 3.4V, Tcase = +25oC. See Figure 1. SYMBOL ICC ICC VoutDC AV CHARACTERISTICS Supply Current @ 1MHz Supply Current @ 50MHz Output DC Level Voltage Gain Gain Matching 38 11 MIN 22 TYP 26 48 42 13 0.2 46 15 MAX 30 UNITS mA mA V V dB AC ELECTRICAL CHARACTERISTICS VS = 80V, CL = 12pF, Vbias = 12V, Tcase = +25oC. See Figure 1. SYMBOL tr tf BW Le OS CHARACTERISTICS Rise Time Fall Time Bandwidth Linearity Overshoot MIN TYP 5.0 4.2 75 8.0 0 MAX 7.0 6.0 UNITS ns ns MHz % % FIGURE 1. TEST CIRCUIT 12V C4 C3 C6 R1 INPUT C1 R2 Q1 11 2,7,9 VCC VBIAS 1/3 CVA2415TZ 1,6,8 VIN D1 3,4,10 VOUT C2 VCC L1 OUTPUT R5 D2 R4 CL R6 R3 5 GND R1 = 8.2kW R2 = 2.7kW R3 = 10.0KW R4 = 34W R5 = 1.5kW R6 = 150W D1 = FDH400 D2 = FDH400 L1 = 560nH Q1 = 2N5770 1L-01 C1 = 0.01mF C2 = 0.01mF C3 = 0.1mF C4 = 0.47mF CL = 12pF (Including Parasitics) C6 = 1.0mF CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2415TZ CORPORATION APPLICATION INFORMATION The CVA2415TZ is a high voltage triple CRT driver suitable for VGA, Super VGA, IBM(R) 8514, 1280 x 1024 and 1024 x 768 non-interlaced display applications. The CVA2415TZ features 80V operation and low power dissipation. 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. Thermal Considerations 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. Average dissipation per stage is 2.8W, increasing to 4.8W at minimum output voltage. The CVA2415TZ cannot be used without heat sinking. Figure 2 shows the power dissipated in each channel over the operating voltage range of the device, typical "average" power dissipation with the device output voltage at one half the supply voltage is 2.2W per channel for a total dissipation of 6.6W package dissipation. Under white screen conditions, i.e. 20V output, dissipation increases to 3.4W per channel or 10.3W total. The CVA2415TZ 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: Rth = (100 - 50oC) = 4.8oC/W 14.4W FIGURE 2. CVA2415TZ DC Characteristics 5 OUTPUT VOLTAGE (VOLTS) 90 80 70 60 50 40 30 20 10 0 1 2 3 4 5 6 7 1L-09 POWER DISSIPATION (WATTS) VOLTAGE POWER 4 3 2 1 INPUT VOLTAGE The CVA2415TZ maximum load is 600 to ground or V+. The output of CVA2415TZ is not short circuit proof. resistance to V+ or Ground should be > 600. Any FIGURE 3. FALL TIME 80V 80V RISE TIME BANDWIDTH 0dB 20V 10ns/DIV 20V 10ns/DIV 1 10 MHz 100 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 GAIN 10dB/DIV VOLTS 10V/DIV VOLTS 10V/DIV CVA2415TZ CORPORATION TYPICAL APPLICATION A typical application of the CVA2415TZ is shown in Figure 4. FIGURE 4. TYPICAL APPLICATION 12V C3 C4 C6 R2 C2 11 VCC VBIAS 2,7,9 1/3 CVA2415TZ VIN D1 L1 R4 OUTPUT C1 R5 VOUT 3,4,10 D2 FROM PREAMP R1 1,6,8 CL 5 GND DC RESTORE 1L-03 C1 F CVA2415TZ 1.0 C2 F 0.01 C3 F 0.1 C4 F 0.47 CL* pF 12 C6 F 1.0 R1 22 R2 47 R4 34 R5 K 1.5 D1 FDH400 D2 FDH400 L1 nH 560 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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