Low Cost Triple CRT Driver CORPORATION Preliminary Data Sheet CVA2400A DESCRIPTION FEATURES • • • Rise/Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0ns Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65VP-P Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V APPLICATIONS • • • • CRT driver for up to 76kHz Monitors Excellent Gray Scale Linearity Emitter Peaking Option Adjustable Gain The CVA2400A contains three wide band triple amplifiers, specifically designed to drive a CRT. It features no crossover distortion for excellent gray scale linearity, external emitter peaking to maximize the high frequency gain at the cross hatch pattern and an adjustable gain for ease of use. This device can drive monitors with resolutions of 1280 X 1024 (interlaced) with pixel frequencies of 176MHz. The part is housed in the industry standard 11-lead TO-220 molded power package. The heat sink is grounded. ORDERING INFORMATION Part Package Temperature CVA2400A T11A 0oC to +110oC CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC VCC 9 11 10 9 8 VOUT 1 VCC VOUT 3 7 6 5 4 3 2 1 VBIAS VOUT 11,10,8 Gain/Peaking 3 Control VIN 3 Gain/Peaking 2 Control VIN 2 Gain/Peaking 1 Control VIN 1 VBIAS 50W 7 VIN 1,3,5 GND = TAB TOP VIEW T11A PACKAGE R1 = 1200W VOUT 2 1N-22 2,4,6 Gain/Peaking Control GND TAB 1Q-42 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION ABSOLUTE MAXIMUM RATINGS Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V Storage Temperature . . . . . . . . . . . . . . . . . . . -25oC to +125oC Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +175oC Case Temperature . . . . . . . . . . . . . . . . . . . . . . . 0oC to +110oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.2V, VOUT = 50Vp-p. TCASE = +25oC. See Figure 1. SYMBOL CHARACTERISTICS MIN TYP MAX UNITS Icc Supply Current 30 35 40 mA VOUT DC Output DC Level 40 45 50 V Av Voltage Gain 14 14.4 15 V RIN Input Impedance 10,000 12,000 20,000 Ω 0.2 0.7 dB Gain Matching AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.2V, VOUT = 45Vp-p. TCASE = +25oC. See Figure 1. SYMBOL CHARACTERISTICS MIN TYP MAX UNITS Tr Rise Time 6 7 ns Tf Fall Time 4.5 5.5 ns Le Linearity 6 OS Overshoot 3 % 7 % FIGURE 1. TEST CIRCUIT VCC 9 C3 D1 VBIAS C1 C4 7 CVA2400A C2 VIN VIDEO INPUT 1,3,5 C7 C1 = 0.01m F C2 = 100m F C3 = 0.1m F C7 = 40pF (TYP) R1 11,10,8 C6 D2 VP G 2,4,6 R2 VOUT TEKTRONIX FET PROBE MODEL 6201 (CAP. 1.5pF) GND TAB C4 = 100m F C6 = 8pF W W R1 = 82 R2 = 15 D1, D2 = FHD400 1Q-43 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION FIGURE 2. APPLICATION CIRCUIT VCC 9 C3 VBIAS R3 C1 D1 7 C2 CVA2400A 5,3,1 11,10,8 C5 R1 SPARK GAP DC BIAS GND TAB R1 = 82W R2 = 15W R3 = 47W R4 = 47(1/2W)W R5 = 820W APPLICATION INFORMATION C1 = 0.01m F C2 = 100m F C3 = 0.1m F C4 = 100m F C5 = 2.2m F C7 = 40 - 120pf D1, D2 = FHD400 L = 150 - 330nH 1Q-44 FIGURE 3. CVA2400A DC Characteristics 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. The CVA2400A 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.: 25V output, dissipation increases to 11W total. The CVA2400A 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: OUTPUT VOLTAGE (V) Thermal Considerations 110 100 90 80 70 60 50 40 30 20 10 5 4 3 VOLTAGE POWER 2 1 0 1 2 3 4 5 INPUT VOLTAGE 6 POWER DISSIPATION (W) The CVA2400A is a high voltage triple CRT driver suitable for VGA, Super VGA, IBM® 8514, and 1280 x 1024 non-interlaced display applications. The CVA2400A features 80V operation. The part is housed in the industry standard 11 lead TO-220 molded power package. The heat sink is grounded for ease of manufacturing and RFI shielding. Rth = R4 R5 D2 VPG 6,4,2 R2 C7 L VOUT VIN VIDEO INPUT C4 7 1Q-45 (100 − 50oC) = 4.5oC/W 11W The CVA2400A maximum load is 600Ω to ground or V+. The output of CVA2400A is not short circuit proof. resistance to V+ or Ground should be > 600Ω. Any CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION TYPICAL CHARACTERISTICS VOUT vs FREQUENCY vs I CC 50 90 VOUT 40 80 35 70 60 30 I CC 25 50 20 40 15 30 10 20 5 10 0 100 0 1 10 20 30 40 50 70 80 I CC (mA) VOUT (VP-P) 45 90 1Q-48 FREQUENCY (MHz) VOUT vs VIN vs I CC 80 80 70 VOUT 60 60 50 50 40 40 30 30 I CC 20 20 10 0 I CC (mA) V OUT (V) 70 10 0 0.5 1.0 1.5 2.0 2.5 3.0 VIN (VOLTS) 3.5 4.0 4.5 5.0 5.5 0 6.0 1Q-47 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION TYPICAL CHARACTERISTICS (continued) RISE TIME FALL TIME 10V/DIV 6.25V 10V/DIV 6.25V -3.75V -40ns 160ns 20ns/DIV -3.75V -40ns 160ns 20ns/DIV 1S-32 CROSS HATCH WHITE BACKGROUND 1S-33 CROSS HATCH BLACK BACKGROUND 10V/DIV 7.25V 10V/DIV 7.25V -2.75V 2.4ns 202.4ns 20ns/DIV 1S-35 -2.75V -47.6ns 152.4ns 20ns/DIV 1S-34 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