Improved Triple 85MHz CRT Driver CORPORATION Not recommended for new design. See CVA2400A. CVA2417TX FEATURES • Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85MHz • Fall Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.8ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4ns • RiseTime. • Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 VP-P • Excellent Gray Scale Linearity Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80V • Supply • Pin to Pin Compatible with CVA2415T APPLICATIONS • CRT Driver for 1280 x 1024 and 1024 x 768 Color Monitors DESCRIPTION The CVA2417TX 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) with pixel frequency up to 160MHz. 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 CVA2417TX T11A -20oC to +100oC CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC V+ 11 10 9 8 7 6 5 4 3 2 1 11 V+ VOUT 3 BIAS 3 (12V) VIN 3 VOUT BIAS 2 (12V) 3,4,10 VIN 2 GND VOUT 2 VBIAS 2,7,9 VOUT 1 BIAS 1 (12V) VIN 1 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 CVA2417TX CORPORATION ABSOLUTE MAXIMUM RATINGS Operating Temperature . . . . . . . . . . . . . . . . -20oC to +100oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V Storage Temperature . . . . . . . . . . . . . . . . . . -25oC to +100oC DC ELECTRICAL CHARACTERISTICS VS = 80V, CL = 12pF, Vbias = 12V, Vin = 3.4V, Tcase = +25oC. See Figure 1. SYMBOL CHARACTERISTICS MIN TYP MAX UNITS 38 mA ICC Supply Current @ 1MHz 32 ICC Supply Current @ 50MHz 55 VoutDC Output DC Level 40 45 50 V AV Voltage Gain 11 13 15 V Gain Matching mA 0.2 dB AC ELECTRICAL CHARACTERISTICS VS = 80V, CL = 12pF, Vbias = 12V, Tcase = +25oC. See Figure 1. SYMBOL CHARACTERISTICS MIN TYP MAX UNITS tr Rise Time 4.4 6.0 ns tf Fall Time 3.8 5.0 ns BW Bandwidth 85 MHz Le Linearity 8 % OS Overshoot 10 % FIGURE 1. TEST CIRCUIT 12V C4 C3 C6 R1 Q1 INPUT C1 R2 R6 R3 11 2,7,9 VCC VBIAS 1/3 CVA2417TX 1,6,8 VIN D1 L1 3,4,10 VOUT R5 C2 VCC OUTPUT R4 CL D2 5 GND C1 = 0.01m F C2 = 0.01m F C3 = 0.1m F C4 = 0.47m F CL = 12pF (Including Parasitics) C6 = 1.0m F R1 = 8.2kW R2 = 2.7kW R3 = 10.0KW R4 = 34W R5 = 1.5kW R6 = 150W D1 = FDH400 D2 = FDH400 L1 = 560nH Q1 = 2N5770 1H-33 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2417TX CORPORATION APPLICATION INFORMATION FIGURE 2. CVA2417TX DC Characteristics The CVA2417TX 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 CVA2417TX 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 CVA2417TX 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 2.8W per channel for a total dissipation of 8.4W package dissipation. Under white screen conditions, i.e.: 15V output, dissipation increases to 4.8W per channel or 14.4W total. The CVA2417TX 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) 14.4W = 3.5 C/W o 90 4 80 70 60 3 50 VOLTAGE 40 POWER 2 30 20 1 10 0 1 2 3 4 5 6 POWER DISSIPATION (WATTS) OUTPUT VOLTAGE (VOLTS) 5 7 1H-43 INPUT VOLTAGE The Thermalloy #14754 is one example of a heatsink that meets this requirement. The CVA2417TX maximum load is 600Ω to ground or V+. The output of CVA2417TX is not short circuit proof. resistance to V+ or Ground should be > 600Ω. Any FIGURE 3. FALL TIME 80V BANDWIDTH RISE TIME 80V VOLTS 10V/DIV VOLTS 10V/DIV GAIN 10dB/DIV 0dB 10V 10V 5ns/DIV 5ns/DIV 1 10 100 MHz CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2417TX CORPORATION TYPICAL APPLICATION A typical application of the CVA2417TX is shown in Figure 4. FIGURE 4. TYPICAL APPLICATION 12V 11 C3 VCC C4 C6 R2 FROM D1 VBIAS 2,7,9 1/3 CVA2417TX VIN R1 1,6,8 PREAMP L1 R4 VOUT OUTPUT 3,4,10 C1 R5 CL D2 5 GND CVA2417 C2 DC RESTORE 1H-34 C1 µF C2 µF C3 µF C4 µF CL* pF C6 µF R1 Ω R2 Ω R4 Ω R5 KΩ D1 D2 L1 nH Q1 1.0 0.01 0.1 0.43 12 1.0 22 47 34 1.5 FDH400 FDH400 560 2N5770 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025