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| STV5109 RGB HIGH VOLTAGE VIDEO AMPLIFIER s s s s s Bandwidth : 8MHz typical Supply Voltage : 220V typical Rise and Fall Time : 50ns TYPICAL CRT Cathode Current Outputs for Parallel or Sequential Cut-off or Drive Adjustment Flashover Protection DESCRIPTION The STV5109 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 STV5109 can be used with both parallel and sequential sampling applications. MULTIWATT 15 (Plastic Package) ORDER CODE: STV5109 Figure 1. PIN CONNECTIONS 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 BLUE FEEDBACK BLUE CATHODE CURRENT BLUE OUTPUT GREEN FEEDBACK GREEN CATHODE CURRENT GREEN OUTPUT RED FEEDBACK GROUND RED OUTPUT RED CATHODE CURRENT V DD HIGH VOLTAGE RED INPUT GREEN INPUT V CC LOW VOLTAGE BLUE INPUT 5109-01.eps Tab connected to Pin 8 September 2003 1/7 www..com 1 www..com www..com STV5109 PIN FUNCTION N 1 2 3 4 5 6 Description Input of the "blue" amplifier. It is a virtual ground with 3.85V bias voltage and 75A input bias current. Low voltage power supply, typically 12V. VCC Green Input Input of the "green" amplifier. It is a virtual ground with 3.85V bias voltage and 75A input bias current. Red Input Input of the "red" amplifier. It is a virtual ground with 3.85V bias voltage and 75A input bias current. High voltage power supply, typically 220V. VDD 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. Red Output Output driving the red cathode. Pin 7 is internally protected against CRT arc discharges by a diode limiting the output voltage to VDD. Ground Also connected to the heatsink. Red Feedback Output driving the feedback resistor network for the red amplifier. Green Output Output driving the green cathode. Pin 10 is internally protected against CRT arc discharges by a diode limiting the output voltage to VDD. 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. Green Feedback Output driving the feedback resistor network for the green amplifier. 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. 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. Blue Feedback Output driving the feedback resistor network for the blue amplifier. Function Blue Input 7 8 9 10 11 12 13 14 15 2/7 1 STV5109 Figure 2. BLOCK DIAGRAM OF EACH CHANNEL 15 (12, 9) 5 13 (10, 7) 14 (11, 6) 2 1 (3, 4) REFERENCE VOLTAGE 5109-02.eps GND 8 3/7 1 STV5109 ABSOLUTE MAXIMUM RATINGS Symbol VDD VCC IOD IOG IFD IFG Ij Tj Toper Tstg Parameter Supply High Voltage Supply Low Voltage Output Current to VDD to Ground Output Current < 50s duration to VDD to Ground Input Current Junction Temperature Operating Ambient Temperature Storage Temperature Pin 5 Pin 2 Pins 7 - 10 - 13 Value 250 20 Protected 8 Pins 9 - 12 - 15 45 45 60 150 0, + 70 - 20, + 150 mA mA mA C C C Unit V V mA Pins 1 - 3 - 4 THERMAL DATA Symbol Rth(j-c) Rth(j-a) Parameter+ Junction-Case Thermal Resistance Junction-Ambient Thermal Resistance Max. Typ. Value 3 35 Unit C/W C/W ELECTRICAL CHARACTERISTICS (VCC = 12V ; VDD = 210V ; Tamb = 25oC ; AV = 55 unless otherwise specified) Symbol VDD VCC IDD ICC Vsath RON BW Parameter Test Conditions High Supply Voltage (Pin5) Low Supply Voltage (Pin 2) High Voltage Supply Internal DC Current VOUT = 120V (without current due to the feedback network) Low Voltage Supply Internal DC Current Output Saturation Voltage (High level) IO = - 10A (Pins7-10-13) Output Mos Transistor (Low level) (Pins7-10-13) Measured on CRT cathodes. Bandwidth at - 3dB (CLOAD = 10pF, RPROTECT = 1k VOUT = 120V, D VOUT = 100VPP) Measured between 10% & 90% of Rise & Fall Time output pulse (CLOAD = 10pF, RPROTECT = 1k VOUT = 120V, D VOUT = 100VPP Open Loop Gain Open Loop Gain Difference between 2channels Open Loop Gain Temperature Coefficient Internal Power Dissipation VOUT = 2MHz, 70VPP sine wave, VBLACK = 170V, CL = 20pF (seecalculationbelow) RF = 68k Internal Voltage Reference (Pins 1-3-4) VOUT = 120V Voltage Reference Temperature Coefficient Input Bias Current (Pins 1-3-4) VOUT = 120V Input Resistance ESD Human Body Model Min. Typ. Max. Unit 220 240 V 10 12 15 V 9.5 38 5 1.7 8 15 55 mA mA V k MHz tR, tF GO 50 47 -1.5 50 0 0 3.6 1.5 ns dB dB dB/oC dB/C P VREF IIB RI ESD 3.55 3.85 4.15 V 0 mV/C 75 A 4 k 1.2 kV 4/7 1 STV5109 TYPICAL APPLICATION The STV5109 is composed of three independent amplifiers, each of them including : - A differential amplifier, the gain of which is fixed by external feedback resistors, - A voltage reference, - A PMOS transistor providing a copy of the cathode current, - A protection diode against CRT arc discharges. PC Board Layout The best performances of the high voltage video amplifier will be obtained only with a carefully designed PC board. Output to input capacitance is of particular importance. For a single amplifier, the input-output capacitance, in parallel with the relatively high feedback resis-tance, creates a pole in the closed-loop transfer function. A low parasitic capacitance (0.3pF) feedback resistor and HF isolated printed wires are necessary. Figure 3. Application Example VCC 12V 100m F 100nF 2 8 5 100nF VDD 220V 10m F Furthermore, capacitive coupling from the output of an amplifier toward the input of another one may induce excessive cross-talk. Power Dissipation The power dissipation consists of a static part and a dynamic part. The static dissipation is a function of VOUT(DC), VDD and R F. Reasonable approximation of the static power can be calculated by the following equation: 3 VDD ( V DD - V OUT ) 3 V OUT ( V DD - V OUT ) Ps = ---------------------------------------------- + ------------------------------------------------40 K RF The dynamic dissipation depends on the signal spectrum, VOUT, VDD and the load capacitance. For a sine wave, dynamic dissipation is Pd = 3 x F x CL x VOPP x 0.8 x VDD. The load capacitance CL includes CRT and board capacitance (10pF), and amplifier output capacitance (8pF) : total CL value is about 20pF. 68kW VDD 470W 470pF 9 1kW CATHODE 1 7 4 1.2kW VREF 1.8kW 12 VDD 6 4.7kW 10 3 11 CATHODE 2 15 VDD 13 1 14 CATHODE 3 CUT-OFF SAMPLING STV5109 5109-03.eps 5/7 1 STV5109 PACKAGE MECHANICAL DATA 15 PINS - PLASTIC MULTIWATT Figure 4. 15-Pin Package 6/7 1 STV5109 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information 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 or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without the express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c)2003 STMicroelectronics - All Rights Reserved. Purchase of I2C Components by STMicroelectronics conveys a license under the Philips I2C Patent. Rights to use these components in an I2C system is granted provided that the system conforms to the I2C Standard Specification as defined by Philips. STMicroelectronics Group of Companies Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 7/7 |
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