STV9556 STMicroelectronics, STV9556 Datasheet
STV9556
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STV9556 Summary of contents
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... Rise and Fall Times: 7.5 ns (Typ.) Bandwidth: 50 MHz (Typ.) Very low stand-by power consumption Perfectly matched with preamplifiers DESCRIPTION The STV9556 is a triple-channel video amplifier designed in a 120V-high voltage technology and able to drive in DC-coupling mode the 3 cathodes of a CRT monitor. The STV9556 supports PICTURE ...
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BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... GNDP REF 2 IN2 Video Input (channel 1) Video Input (channel 2) Low Supply Voltage Video Input (channel 3) Ground Analog Ground Substrat High Supply Voltage Ground Power Video output (channel 3) Video output (channel 2) VIdeo output (channel 1) STV9556 OUT3 9 STV9556 VDD GNDP 4 IN3 Function 3/24 3 ...
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... STV9556 3 ABSOLUTE MAXIMUM RATINGS Symbol V High supply voltage DD V Low supply voltage CC ESD susceptibility V Human Body Model (100pF discharged through 1.5K ESD EIAJ norm (200pF discharged through 0 I Output source current (pulsed < Output sink current (pulsed < Maximum Input Voltage IN Max V Minimum Input Voltage ...
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... LE Linearity error V Internal voltage reference REF Note 1: The STV9556 goes into stand-by mode when Vcc is switched off (<1.5V). In stand-by mode, Vout is set to low level. Note 2: Matching measured between each channel. Note 3: Pulsed current width < Test Conditions = 110V, Tamb = 25 °C, unless otherwise specified) ...
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... Note 5: PICTURE BOOST condition (video amplitude at 50V or above) is used in some applications when displaying still picture or moving video. In this condition the high level of contrast improves the pictures quality at the expense of the video performances (t Figure 1. AC test circuit STV9556 6/24 3 Test Conditions 1) V =50V, V=40V DC ...
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... THEORY OF OPERATION 6.1 General The STV9556 is a three-channel video amplifier supplied by a low supply voltage: V high supply voltage: V (up to 115V). DD The high values of V supplying the amplifier output stage allow direct control of the CRT cathodes (DC DD coupling mode coupling mode, the application schematic is very simple and only a few external components are needed to drive the cathodes ...
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... STV9556 6.2 Output voltage A very simplified schematic of each STV9556 channel is shown in The feedback network of each channel is integrated with a typical built-in voltage gain of G=20 (40k/2k). The output voltage V is given by the following formula: OUT V = (G+ REF OUT for and V = 5.6V, we have REF V = 117 ...
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... K = 0.72 have 3.47W and P STAT DYN Therefore 6.51W. TOT Note 6: This worst thermal case must only be considered for TJmax calculation. Nevertheless, during the average life of the circuit, the conditions are closer to the white picture conditions (see Note 6) = 3.04W STV9556 9/24 ...
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... Figure 6. Power dissipation vs frequency 8.00 7.00 6.00 Vdd=100 5.00 4.00 Vdd=90 3.00 2.00 1.00 0. Frequency (MHz) (72% active time) Figure 8. Speed versus offset STV9556 Speed vs Offset (Vdc Offset (Vdc) 10/24 =200 , V=40V , unless otherwise specified - see P PP Figure 5. V 120 ...
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... INTERNAL SCHEMATICS Figure 10. RGB inputs VCC IN pins GNDS Figure 12. VDD GNDS Figure 14. GNDP GNDS Figure 11. RGB outputs Figure 13. VCC VDD Figure 15. GNDA GNDA GNDP STV9556 VDD OUT pins 9, 10, 11 GNDS VCC GNDS GNDS 11/24 ...
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... STV9556 10 APPLICATION HINTS 10.1 How to choose the high supply voltage value (V The V high supply voltage must be chosen carefully. It must be high enough to provide the necessary DD video adjustment but set to minimum value to avoid unecessary power dissipation. Example (see Figure 2): The following example shows how the optimum V – ...
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... Amplifier grounding: The 3 grounds GNDS, GNDA and GNDP must be connected together as close as possible to the device R19(**) 33-40 C24 4.7 F/150V D12 FDH400 L1 R10 0.33 H 110 /0.5W D13 C29(***) FDH400 0.22 F R29(***) 1-10 STV9556 C18 100nF A R11 CRT 110 /0.5W F1 Spark gap B 200V 13/24 ...
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... Input Networks (Network #2 and #3 below) can be used in replacement of the reference Input Network #1. See Application note AN1510 for complete description. Input Network # 10pF 14/24 R C11 C10(*) C12(*) 4.7 F 100nF 100nF STV9556 10pF REF GNDS GNDA Input Network # 15pF /t >5.5ns. F C24 4.7 F R19(***) ...
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... Reducing this capacitive load is achieved by moving away the output tracks from the other tracks (especially ground) and by using thin tracks (<0.5mm), see Cross talk: Output and input tracks must be set apart. The STV9556 pin-out allows the easy separa- tion of input and output tracks on opposite sides of the amplifier (see Length: Connection between amplifier output and cathode must be as short and direct as possible ...
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... Input Networks #2 and #3 can be used as well The advantage of such an architecture is to use smaller V consumption. This is due to the fact that the STV9556 provides only the video signal and not the cut-off adjustment. The disadvantage is to have an application with more components (DC restore circuitry). ...
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... Stand-by mode, spot suppression The usual way to set a monitor in stand-by mode is to switch-off the Vcc (12V). The STV9556 has an extremely low power consumption (I and the outputs are set to low level (white picture). To avoid the display of a spot effect during the switch-off phase necessary to adjust the G1 circuitry ...
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... STV9556 10.10 Conclusion Video response is always a compromise between several parameters. For example, the rise/fall time improvement leads to the overshoot deterioration. The recommended way to optimize the video response is set R10+R11 for arcing protection (min. 200 2. To adjust R20 and R10+R11. Increasing their value increases the ...
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... Figure 20. STV9556/9555/9553 + TDA9210/STV9211 + STV9936S/P DC-coupling demonstration board: Silk Screen and Trace STV9556 19/24 ...
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... STV9556 Figure 21. Outputs trace (from figure 19) Figure 22. CRT socket trace (from figure 19) 20/24 ...
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... Figure 23.STV9556/55/53 + STV9936S/P + TDA9210/STV9211 DC-coupling demo-board schematic Vdd 7 Vcc 3 GND 12 GND GNDP 8 GNDS 6 GNDA 5 STV9556 21/24 ...
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... STV9556 11 PACKAGE MECHANICAL DATA 11 PIN - CLIPWATT LEAD Dimensions Min. A 2. 1.3 E 0. 1 18.55 H3 19.9 L 17.7 L1 14.35 L2 10.9 L3 5.4 M 2.34 M1 2.34 R 1.45 22/ Millimeters Typ. Max. 3 3.05 1 1.05 0.15 - 1.5 1.7 0.515 0.55 0.8 0.86 0.05 0.1 1.7 1 ...
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... Note 6: No intrusions allowed inwards the leads Critical dimensions: Lead split (M1) Total length (L) Millimeters Typ. Max. 3.3 3.4 0.3 - 0.5 - 0.7 0.75 10deg. 5deg. 75deg. STV9556 Inches Min. Typ. Max. 0.126 0.13 0.134 - 0.012 - 0.019 0.025 0.027 0.029 10deg. 5deg. 75deg. ...
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... STV9556 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 ...