Improved Triple 75MHz CRT Driver Not recommended for new design. See CVA2400A. CVA2415T FEATURES @ Bandwidth ......... 00 cece eee eee eee 75MHz @ Fall Time... 12. eee eee 4.2ns @ RiseTime. .. 0.2.2.0. e cece eee 5.0ns @ SWING 20. eee 50 Vp-p @ Excellent Gray Scale Linearity @ Supply Voltage... 2.2... eee 80V @ Pin to Pin Compatible with LM2406 APPLICATIONS @ CRT Driver for 1280 x 1024 and 1024 x 768 Color Monitors CORPORATION , DESCRIPTION The CVA2415T 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 Package CVA2415T TIA Temperature -20C to +100C CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC = = V+ a o Vout 3 BIAS 3 (12V) Vins BIAS 2 (12V) Vine GND Vout2 Vout BIAS 1 (12V) Vin 1 pS |@oO | |O [HO IN |o |o = PIN 1 DESIGNATOR TIA Vout 3,4,10 1H-32 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2415T calogic ABSOLUTE MAXIMUM RATINGS Supply Voltage... 0... eee eens 90V Operating Temperature ................ -20C to +100C Storage Temperature.................. -25C to +100C Lead Temperature ... 0... ee eee +300C DC ELECTRICAL CHARACTERISTICS Vs = 80V, C_ = 12pF, Vbias = 12V, Vin = 3.4V, Tcase = +25C. See Figure 1. SYMBOL CHARACTERISTICS MIN TYP MAX UNITS lec Supply Current @ 1MHz 22 26 30 mA lec Supply Current @ 50MHz 48 mA Voutbe Output DC Level 38 42 46 Vv Av Voltage Gain 11 13 15 Vv Gain Matching 0.2 dB AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 12pF, Vbias = 12V, Tease = +25C. See Figure 1. SYMBOL CHARACTERISTICS MIN TYP MAX UNITS tr Rise Time 5.0 7.0 ns tt Fall Time 42 6.0 ns BW Bandwidth 75 MHz Le Linearity 8.0 % Os Overshoot 0 % FIGURE 1. TEST CIRCUIT C1 = 0.01 nF R1 = 8.2kQ D1 = FDH400 C2 = 0.01 nF R2 = 2.7kQ D2 = FDH400 C3 = 0.1pF R3 = 10.0KQ L1 = 560nH C4 = 0.470F R4 = 340 Q1 = 2N5770 CL = 12pF (Including Parasitics) R5 = 1.5kQ C6 =1 OF R6 = 1500 4L-01 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2415T APPLICATION INFORMATION The CVA2415T 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 CVA2415T 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 CVA2415T 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 CVA2415T case temperature must be maintained below +100C. If the maximum expected ambient temperature is +50C, then a heat sink is needed with thermal resistance equal to or less than: CORPORATION a FIGURE 2. CVA2415T DC Characteristics OUTPUT VOLTAGE (VOLTS) 0 1 2 3 4 5 6 INPUT VOLTAGE (SLLVM) NOILWdISSIG H3MOd The CVA2415T maximum load is 600Q to ground or V*. The output of CVA2415T is not short circuit proof. resistance to V* or Ground should be > 600Q. Any (100 50C) _ O Rih ="Taaw 4.8C/W FIGURE 3. FALL TIME RISE TIME BANDWIDTH 80V 80V VOLTS 10V/DIV VOLTS 10V/DIV 20V 20V 1Ons/DIV OdB GAIN 10dB/DIV 10ns/DIV MHz 100 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2415T calogic TYPICAL APPLICATION Atypical application of the CVA2415T is shown in Figure 4. FIGURE 4. TYPICAL APPLICATION md C3 4 y Pe ; It < a IL co to, O1 uv R2 Veins Lt 2,7,9 R4 OUTPUT FROM at y CVA2415T | IN C1 1,6,8 RS Co PREAMP N J 5 DC GND RESTORE 1L-03 C1 c2 C3 c4 | cL* | c6 | R1 R2 R4 R5 D1 D2 L1 uF uF uF uF pF uF Q Q Q KQ nH CVA2415T 10 | 0.01 0.1 | 047] 12 | 10 | 22 47 34 1.5 | FDH400 | FDH400| 560 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025