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| 180V CRT Driver CORPORATION CVA24150T FEATURES DESCRIPTION The CVA24150T is a single channel, very high voltage amplifier, designed to drive a CRT. It is capable of delivering 65MHz at 100VP-P. It features no cross-over distortion for excellent linearity. Emitter peaking option is available to adjust the high frequency response. CVA24150T features high gain to match existing pre-amplifier drive capability. * Fall Time (CLOAD = 10pf) . . . . . . . . . . . . . . . . . . . . . . 10ns * RiseTime (CLOAD = 10pf) . . . . . . . . . . . . . . . . . . . . . . . 7ns * Fall Time (CLOAD = 20pf) .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 13ns 10ns * RiseTime (CLOAD = 20pf) * Fall Time (CLOAD = 30pf) . . . . . . . . . . . . . . . . . . . . . . 15ns . . 13ns * RiseTime (CLOAD. = .30pf) .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 100Vp-p * Swing Voltage . . . . . . * Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180V * Low Power * Smaller Package * High Definition Television * Projection Television * Arcades * TV Monitors CONNECTION DIAGRAM BENEFITS ORDERING INFORMATION Part CVA24150T Package T11A Temperature -20oC to +100oC APPLICATIONS SIMPLIFIED SCHEMATIC DIAGRAM VCC 11 10 9 8 7 6 N/C 5 GND 4 3 2 1 GND EMITTER PEAKING N/C VOUT 11 VCC VOUT N/C VOUT 8,9 VBIAS VIN 1 VIN VBIAS 2 TAB = GND TOP VIEW T11A PACKAGE 1P-06 3 EMITTER PEAKING 4,5 1P-07 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA24150T CORPORATION ABSOLUTE MAXIMUM RATINGS Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200V Storage Temperature . . . . . . . . . . . . . . . . . . -25oC to +100oC Operating Temperature . . . . . . . . . . . . . . . . -20oC to +100oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC DC ELECTRICAL CHARACTERISTICS VS = 180V, CL = 10pF, DCinput bias = 12V, Vin = 3.4V, Vout = 100p-p, Tcase = +25oC. See Figure 1. SYMBOL ICC VoutDC AV CHARACTERISTICS Supply Current @ 1MHz Output DC Level Voltage Gain 65 24 MIN TYP 35 70 26 MAX 40 75 28 UNITS mA V V AC ELECTRICAL CHARACTERISTICS VS = 180V, CL = 10pF, DCinput bias = 12V, Vin = 3.4V, Vout = 100Vp-p, Tcase = +25oC. See Figure 1. SYMBOL tr tf BW Le OS CHARACTERISTICS Rise Time Fall Time Bandwidth (Note 1) Linearity Overshoot MIN TYP 10 10 70 2 3 5 7 MAX 12 12 UNITS ns ns MHz % % Note 1: -3dB at VP-P = 100V FIGURE 1. TEST CIRCUIT VCC C6 C2 D1 1 Vbias 11 V CC CVA24150T 33 22 82pF GND TAB R1 = 479 R2 = 5.1K9 3 4,5 8,9 L1 2 Vin Vout D2 OUTPUT R2 R1 CL C1 = 1.0mF C2 = 1.0mF CL = 10pF (Including Parasitics) D1 = FDH400 D2 = FDH400 L1 = 560nH Q1 = 2N5770 1Q-50 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA24150T CORPORATION FIGURE 2. APPLICATION CIRCUIT VCC 11 C3 C4 VBIAS C1 R2 1 D1 CVA24150T L R3 R4 SPARK GAP C2 VIN VIDEO INPUT 2 VPG 3 VOUT 8,9 C5 D2 DC BIAS GND TAB 4,5 R1 = 15W R2 = 47W R3 = 47(1/2W)W R4 = 820W C1 = 0.01mF D1, D2 = FHD400 C2 = 100mF L = 150 - 330nH C3 = 0.1mF C4 = 100mF C5 = 2.2mF C7 = 40 - 120pf 1S-01 R1 N.C. = 6,7,10 C7 FIGURE 3. CVA24150T Transfer DC Characteristics 180 160 140 120 VOUT (V) 12 10 8 POWER (W) 100 90 80 60 40 20 0 0 0 0.2 0.5 0.7 1.0 1.2 1.5 1.7 2.0 2.2 2.5 2.7 3.0 3.2 3.5 3.7 4.0 4.2 4.5 4.7 5.0 VOUT POWER VIN (VOLTS) 1S-02 6 4 2 APPLICATION INFORMATION The CVA24150T is a very high voltage amplifier. Using standard Cascode topology, it is designed primarily to meet the requirement of High Definition Television (HDTV), Projection Television, arcade displays, etc. CVA24150T can deliver 100VP-P yet require only 180V supply voltage. CVA24150T frequency resplonse is excellent, can energize 20ns pixels at 100VP-P into 10pf. At 40pf load, rise time is 18ns. CVA24150T has very high gain (~34) to match any of the available pre-amplifiers. An emitter peaking option is also provided to adjust the high frequency response. The product is housed in industry standard 11 lead TO-220 power package. Thermal Considerations The transfer characteristics of the amplifier are shown in Figure 3. Since this is a class A input stage, power supply current increases as the input signal increases and consequently power dissipation also increases. The CVA24150T cannot be used without heat sinking. Figure 3 shows the power dissipated in each channel over the operating voltage range of the device. Under white screen conditions, i.e.: 70V output, dissipation increases to 11W total. The CVA24150T 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) = 4.5oC/W 11W Any The CVA24150T maximum load is 600 to ground or V+. The output of CVA24150T is not short circuit proof. resistance to V+ or Ground should be > 600. CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA24150T CORPORATION TYPICAL CHARACTERISTICS RISE TIME 1.95V 1.95V FALL TIME 200mV/DIV -50mV -40ns 20ns/DIV 160ns 1S-07 -50mV -40ns 20ns/DIV 200mV/DIV VCC = 180V C L = 10pf VCC = 180V C L = 10pf 160ns 1S-08 RISE TIME 1.95V 1.95V FALL TIME 200mV/DIV -50mV -40ns 20ns/DIV 160ns 1S-09 -50mV -40ns 20ns/DIV 200mV/DIV VCC = 180V C L = 20pf VCC = 180V C L = 20pf 160ns 1S-10 RISE TIME 1.95V 1.95V FALL TIME 200mV/DIV -50mV -40ns 20ns/DIV 160ns 1S-11 -50mV -40ns 20ns/DIV 200mV/DIV VCC = 180V C L = 30pf VCC = 180V C L = 30pf 160ns 1S-12 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA24150T CORPORATION TYPICAL CHARACTERISTICS (continued) RISE TIME 1.95V 1.95V FALL TIME 200mV/DIV -50mV -40ns 20ns/DIV 160ns 1S-13 -50mV -40ns 20ns/DIV 200mV/DIV VCC = 180V C L = 40pf VCC = 180V C L = 40pf 160ns 1S-14 VOUT vs VIN 180 160 140 V OUT (VOLTS) 120 100 80 60 40 20 0 0 0.2 0.5 0.7 1.0 1.2 1.5 1.7 2.0 2.2 2.5 2.7 3.0 3.2 3.5 3.7 4.0 4.2 4.5 4.7 5.0 VIN (VOLTS) 1Q-47 V CC = 180V VOUT vs FREQUENCY vs I CC 120 I CC 100 90 80 80 VOUT (VP-P) 70 VOUT I CC (mA) 60 60 40 50 20 40 0 10 30 20 30 50 FREQUENCY (MHz) 70 80 90 1S-06 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 |
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