STV5111 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 parallel and sequential sampling applications. MULTIWATT 15 (Plastic Package) ORDER CODE: STV5111 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 5111-01.eps Figure 1. PIN CONNECTIONS Tab connected to Pin 8 September 2003 1/7 1 STV5111 PIN FUNCTION N° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2/7 1 Function Blue Input Description Input of the “blue” amplifier. It is a virtual ground with 2.5V bias voltage and 75µA input bias current. Low voltage power supply, typically 9V. VCC Green Input Input of the “green” amplifier. It is a virtual ground with 2.5V bias voltage and 75µA input bias current. Red Input Input of the “red” amplifier. It is a virtual ground with 2.5V bias voltage and 75µA input bias current. High voltage power supply, typically 200V. 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. STV5111 Figure 2. BLOCK DIAGRAM OF EACH CHANNEL 15 (12, 9) 5 13 (10, 7) 14 (11, 6) 2 1 (3, 4) GND 8 5111-02.eps REFERENCE VOLTAGE 3/7 1 STV5111 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 < 50µs 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 Unit V V Protected 8 mA 45 45 60 150 0, + 70 - 20, + 150 mA mA mA °C °C °C Value 3 35 Unit °C/W °C/W Pins 9 - 12 - 15 Pins 1 - 3 - 4 THERMAL DATA Symbol Rth(j-c) Rth(j-a) Parameter+ Junction-Case Thermal Resistance Junction-Ambient Thermal Resistance Max. Typ. ELECTRICAL CHARACTERISTICS (VCC = 12V ; VDD = 210V ; Tamb = 25oC ; AV = 55 unless otherwise specified) Symbol VDD VCC IDD ICC Vsath RON BW tR, tF GO P VREF IIB RI ESD 4/7 1 Parameter Test Conditions High Supply Voltage (Pin5) Low Supply Voltage (Pin 2) High Voltage Supply Internal DC Current VOUT = 100V (without current due to the feedback network) Low Voltage Supply Internal DC Current Output Saturation Voltage (High level) IO = - 10µA (Pins7-10-13) Output Mos Transistor (Low level) (Pins7-10-13) Measured on CRT cathodes. Bandwidth at - 3dB (CLOAD = 10pF, RPROTECT = 1kΩ VOUT = 100V, D VOUT = 100VPP) Measured between 10% & 90% of Rise & Fall Time output pulse (CLOAD = 10pF, RPROTECT = 1kΩ VOUT = 100V, 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 = 68kΩ Internal Voltage Reference (Pins 1-3-4) VOUT = 100V Voltage Reference Temperature Coefficient Input Bias Current (Pins 1-3-4) VOUT = 100V Input Resistance ESD Human Body Model Min. Typ. Max. Unit 200 210 V 7.5 9 10 V 9.5 15 mA 38 55 mA 5 V 1.7 kΩ 6 MHz 60 ns 47 50 dB -1.5 0 2.3 1.2 1.5 dB 0 dB/oC 3.6 dB/°C 2.5 0 75 4 2.7 V mV/°C µA kΩ kV STV5111 TYPICAL APPLICATION The STV5111 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. 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 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. 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. Figure 3. Application Example VDD 200V 10m F 100nF 100nF 2 8 5 9 470W 68kW VDD 470pF VCC 9V 100m F 1kW CATHODE 1 7 4 4.7kW 1.2kW 6 VREF 1.8kW 12 VDD 10 CATHODE 2 3 11 15 VDD 13 CATHODE 3 14 CUT-OFF SAMPLING STV5111 5111-03.eps 1 5/7 1 STV5111 PACKAGE MECHANICAL DATA 15 PINS - PLASTIC MULTIWATT Figure 4. 15-Pin Package 6/7 1 STV5111 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 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