STV5111 STMICROELECTRONICS | Alldatasheet
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RGB HIGH VOLTAGE VIDEO AMPLIFIER ■ Bandwidth : 6MHz typical ■ Supply Voltage : 200V typical ■ Rise and Fall Time : 60ns TYPICAL ■ CRT Cathode Current Outputs for Parallel or Sequential Cut-off or Drive Adjustment ■ Flashover Protection
DESCRIPTION
The STV5111 includes three video amplifiers desi-gned with a high voltage bipolar/CMOS/ DMOS technology (BCD). It drives directly the three cathodes and is protected against flashovers. Thanks to its three cathode current outputs, the STV5111 can be used with both par- allel and sequential sampling applications. Figure 1. PIN CONNECTIONS
N° Function Description 1 Blue Input Input of the “blue” amplifier. It is a virtual ground with 2.5V bias voltage and 75µA input bias current. 2 V CC Low voltage power supply, typically 9V. 3 Green Input Input of the “green” amplifier. It is a virtual ground with 2.5V bias voltage and 75µA input bias current. 4 Red Input Input of the “red” amplifier. It is a virtual ground with 2.5V bias voltage and 75µA input bias current. 5 V DD High voltage power supply, typically 200V.
6 Red Cathode Current Provides the video processor with a copy of the DC current flowing into the red
cathode, for automatic cut-off or gain adjustment. If this control is not used, Pin 6 must be grounded. 7 Red Output Output driving the red cathode. Pin 7 is internally protected against CRT arc discharges by a diode limiting the output voltage to V DD . 8 Ground Also connected to the heatsink. 9 Red Feedback Output driving the feedback resistor network for the red amplifier. 10 Green Output Output driving the green cathode. Pin 10 is internally protected against CRT arc discharges by a diode limiting the output voltage to V DD . 11 Green Cathode Current Provides the video processor with a copy of the DC current flowing into the green cathode, for automatic cut-off or gain adjustment. If this control is not used, Pin 11 must be grounded. 12 Green Feedback Output driving the feedback resistor network for the green amplifier. 13 Blue Output Output driving the blue cathode. Pin 13 is internally protected against CRT arc discharges by a diode limiting the output voltage to VDD .
14 Blue Cathode Current Provides the video processor with a copy of the DC current flowing into the blue
cathode, for automatic cut-off or gain adjustment. If this control is not used, Pin 14 must be grounded. 15 Blue Feedback Output driving the feedback resistor network for the blue amplifier.
Figure 2. BLOCK DIAGRAM OF EACH CHANNEL
ELECTRICAL CHARACTERISTICS ( VCC = 12V ; VDD = 210V ; Tamb = 25oC ; AV = 55 unless otherwise specified) Symbol Parameter Value Unit VDD Supply High Voltage Pin 5 250 V VCC Supply Low Voltage Pin 2 20 V IOD IOG Output Current to VDD to Ground Pins 7 - 10 - 13 Protected mA IFD IFG Output Current < 50µs duration to VDD to Ground Pins 9 - 12 - 15 mA mA I j Input Current Pins 1 - 3 - 4 60 mA Tj Junction Temperature 150 °C Toper Operating Ambient Temperature 0, + 70 °C Tstg Storage Temperature - 20, + 150 °C Symbol Parameter+ Value Unit R th(j-c) Junction-Case Thermal Resistance Max. 3 °C/W R th(j-a) Junction-Ambient Thermal Resistance Typ. 35 °C/W Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD High Supply Voltage (Pin5) 200 210 V VCC Low Supply Voltage (Pin 2) 7.5 9 10 V IDD High Voltage Supply Internal DC Current (without current due to the feedback network) VOUT = 100V 9.5 15 mA ICC Low Voltage Supply Internal DC Current 38 55 mA Vsath Output Saturation Voltage (High level) (Pins7-10-13) IO = - 10µA 5V R ON Output Mos Transistor (Low level) (Pins7-10-13) 1.7 k Ω BW Bandwidth at - 3dB Measured on CRT cathodes. (CLOAD = 10pF, RPROTECT = 1kΩ VOUT = 100V, D VOUT = 100VPP ) 6M H z tR , tF Rise & Fall Time Measured between 10% & 90% of output pulse LOAD = 10pF, RPROTECT = 1kΩ VOUT = 100V, D VOUT = 100VPP 60 ns G O Open Loop Gain 47 50 dB Open Loop Gain Difference between 2channels -1.5 0 1.5 dB Open Loop Gain Temperature Coefficient 0 dB/ oC P Internal Power Dissipation (seecalculationbelow) VOUT = 2MHz, 70VPP sine wave, VBLACK = 170V, CL = 20pF R F = 68kΩ 3.6 dB/°C VREF Internal Voltage Reference (Pins 1-3-4) VOUT = 100V 2.3 2.5 2.7 V Voltage Reference Temperature Coefficient 0 mV/°C IIB Input Bias Current (Pins 1-3-4) V OUT = 100V 75 µA R I Input Resistance 4k Ω ESD ESD Human Body Model 1.2 kV
– A protection diode against CRT arc discharges. sistor and HF isolated printed wires are necessary. induce excessive cross-talk. spectrum, VOUT , VDD and the load capacitance. Pd = 3 x F x CL x VOPP x 0.8 x VDD . tance (8pF) : total CL value is about 20pF. Figure 3. Application Example
15 PINS - PLASTIC MULTIWATT
Figure 4. 15-Pin Package
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