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| TEA2037A HORIZONTAL AND VERTICAL DEFLECTION MONITOR FEATURES SUMMARY DIRECT LINE DARLINGTON DRIVE Figure 1. Package DIRECT FRAME-YOKE DRIVE ( 1A) COMPOSITE VIDEO SIGNAL INPUT CAPABILITY FRAME OUTPUT PROTECTION AGAINST SHORT CIRCUITS PLL HORIZONTAL OSCILLATOR FREQUENCY RANGE FROM 15kHz TO 100kHz VERTICAL OSCILLATOR FREQUENCY RANGE FROM 30Hz TO 120Hz VERY FEW EXTERNAL COMPONENTS VERY LOW COST POWER PACKAGE POWERDIP (8+8) (Plastic Package) DESCRIPTION The TEA2037A is an horizontal and vertical deflection circuit. It uses the same concept as TEA2117 but optimised for small screens, for a very low cost solution. Figure 2. Pin Connections FRAME OSCILLATOR FLYBACK GENERATOR SUPPLY FRAME FLYBACK GROUND GROUND INVERTING INPUT FRAME POWER SUPPLY FRAME OUTPUT 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 V CC1 VIDEO INPUT LINE OUTPUT GROUND GROUND LINE FLYBACK PHASE DETECTOR LINE OSCILLATOR REV. 2 May 2004 1/14 TEA2037A Figure 3. Block Diagram 16 1 7 + POWER STAGE 3 2 4 5 12 13 FRAME OSCILLATOR FRAME-SYNC SEPARATOR FLYBACK GENERATOR Yoke 8 6 15 INPUT STAGE PHASE DETECTOR LINE OSCILLATOR OUTPUT STAGE 14 TEA2037A 11 10 9 VCC1 Table 1. Absolute Maximum Ratings Symbol VCC1 V2 V7 I8nr I8 V14 Ip14 IC14 Tstg TJ Supply Voltage Flyback Generator Supply Voltage Frame Power Supply Voltage Frame Output Current (non repetitive) Frame Output Current (continuous) Line Output Voltage (external) Line Output Peak Current Line Output Continuous Current Storage Temperature Max Operating Junction Temperature Parameter Value 30 35 60 1.5 1 60 0.8 0.4 -40 to 150 + 150 Unit V V V A A V A A C C Table 2. Thermal Data Symbol Rth (j-c) Rth (j-a) Tj Parameter Junction-case Thermal Resistance Max Value 15 45 120 Unit C/W C/W C Junction-ambient Thermal Resistance Typ. (Soldered on a 35m thick 45cm2 PC Board copper area) Recommended Junction Temperature Max 2/14 TEA2037A ELECTRICAL CHARACTERISTICS (Tamb = 25C) Table 3. Supply (shunt regulator) (Pin 16) Symbol ICC1 VCC1 VCC1 LPS Supply Current Supply Voltage (ICC1 = 15mA) Voltage Variation (ICC1: 10mA to 20mA) Starting Threshold for Line Output Pulses Parameter Min. 10 9 -280 9.8 50 Typ. Max. 20 10.5 +280 5 Unit mA V mV V Table 4. Video Input (Pin 15) Symbol V15 MWF VIN Parameter Reference Voltage (I15 = -1A) Minimum Width of Frame Pulse (When synchronized with TTL signal) Sync Bottom to Black Level (RSYNC 15 = 560k) Min. 1.4 50 0.2 0.3 Typ. 1.75 Max. 2 Unit V s VPP Table 5. Line Oscillator (Pin 9) Symbol LT9 HT9 BI9 DR9 FLP1 FLP2 OT9 Low Threshold Voltage High Threshold Voltage Bias Current Discharge Impedance Free Running Line Period (R = 34.9k Tied to VCC1, C = 2.2nF Tied to Ground) Free Running Line Period (R = 13.7K, C = 2.2nF) Oscillator Threshold for Line Output Pulse Triggering Horizontal Frequency Drift with Temperature (see application Figure 11) 1.0 62 Parameter Min. 2.8 5.4 Typ. 3.2 6.6 100 1.4 64 27 4.6 2 1.8 66 Max. 3.6 7.8 Unit V V nA k s s V Hz/C F -----0 Table 6. Line Output (Pin 14) Symbol LV14 OPW Parameter Saturation Voltage (I14 = 200mA) Output Pulse Width (line period = 64s) 20 Min. Typ. 1.1 22 Max. 1.6 24 Unit V s Table 7. Line Flyback Input (Pin 11) Symbol V11 Z11 Bias Voltage Input Impedance Parameter Min. 1.8 4.5 Typ. 2.4 5.8 Max. 3.2 8 Unit V k 3/14 TEA2037A Table 8. Phase Detector Symbol I10 RI10 LI10 CV10 Parameter Output Current During Synchro Pulse Current Ratio (positive/negative) Leakage Current Control Range Voltage Min. 250 0.95 -2 2.60 Typ. 450 1 Max. 800 1.05 +2 7.10 A V Unit A Table 9. Frame Oscillator (Pin 1) Symbol LT1 HT1 BI1 DR1 FFP1 MFP FFP2 FPR FG Low Threshold Voltage High Threshold Voltage Bias Current Discharge Impedance Free Running Line Period (R = 845k Tied to VCC1, C = 180nF Tied to Ground) Minimum Frame Period (I15 = -100A) (with the Same RC) Free Running Line Period (R = 408k, C = 220nF) Frame Period Ratio = Frame Saw-tooth Gain Between Pin 1 and non Inverting Input of the Frame Amplifier Vertical Frequency Drift with Temperature (see application Figure 11) 1.7 300 20.5 Parameter Min. 1.6 2.6 Typ. 2.0 3.1 30 470 23 12.8 14.3 1.8 -0.4 1.9 700 25 Max. 2.3 3.6 Unit V V nA k ms ms ms F -----0 4.10-3 Hz/C Table 10. Frame Power Supply (Pin 7) Symbol V7 I7 Parameter Operating Voltage (with flyback generator) Supply Current (V7 = 30V) Min. 10 Typ. Max. 58 22 Unit V mA Table 11. Flyback Generator Supply (Pin 2) Symbol V2 Operating Voltage Parameter Min. 10 Typ. Max. 30 Unit V 4/14 TEA2037A Table 12. Frame Output (Pin 8) Symbol LV8A LV8B HV8A HV8B FV8A FV8B Parameter Saturation Voltage to Ground (V7 = 30V) I8 = 0.1 I8 = 1A Saturation Voltage to V7 (V7 = 30V) I8 = -0.1 I8 = -1A Saturation Voltage to V7 in Flyback Mode (V8 > V7) I8 = 0.1 I8 = 1A Min. Typ. 0.06 0.37 1.3 1.7 1.6 2.5 Max. 0.6 1 1.6 2.4 2.1 4.5 Unit V V V V V V Table 13. Flyback Generator (Pin 2 and 3) Symbol F2DA F2DB FSVA FSVB Parameter Flyback Transistor on (output = high state) (V2 = 30V) V3/2 with I3 2 = 0.1A I3 2 = 1A V2/3 with I3 2 = 0.1 I3 2 = 1A Flyback Transistor off (output = V7 - 8V) (V7 = V2 = 30V) FCI Leakage Current Pin 2 170 A Min. Typ. 1.5 3.0 0.8 2.2 Max. 2.1 4.5 1.1 4.5 Unit V V V V The TEA2037A performs all the video and power functions required to provide signals for the direct drive of the line darlington and frame yoke. It contains: - A shunt regulator - A synchronization separator - An integrated frame separator without external components - A saw-tooth generator for the frame - A power amplifier for direct drive of frame yoke (short circuit protected) - An open collector output for the line darlington drive - A line phase detector and a voltage control oscillator. The slice level of sync-separation is fixed by value of the external resistors R1 and R2. VR is an internally fixed voltage. The sync-pulse allows the discharge of the capacitor by a 2 x 1 current. A line sync-pulse is not able to discharge the capacitor under VZ/2. A frame sync pulse permits the complete discharge of the capacitor, so during the frame sync-pulse Q3 and Q4 provide current for the other parts of the circuit. 5/14 TEA2037A Figure 4. Synchronization Separator Circuit Figure 5. Frame Separator VZ Q3 Q4 SL1 VR SL2 I ST1 VZ /2 ST2 R1 Video 15 3I SL1 R2 The oscillator thresholds are internally fixed by resistors. The discharge of the capacitor depends on Figure 6. Line Oscillator the internal resistor R4. The control voltage is applied on resistor R5. VCC1 Phase Comparator Output R5 9 R4 6/14 TEA2037A Figure 7. Phase Comparator the video signal are synchronized, the output of the comparator is an alternatively negative and positive current. The frame sync-pulse inhibits the comparator to prevent frequency drift of the line oscillator on the frame beginning. Figure 8. Integrated Flyback VCC1 VC Line Flyback 10 Sync pulse 11 Output Current VC ST2 The sync-pulse drives the current in the comparator. The line flyback integrated by the external network gives on pin 11 a saw tooth, the DC offset of this saw tooth is fixed by VC. The comparator output provides a positive current for the part of the signal on pin 11 greater than to VC and a negative current for the other part.When the line flyback and ST1 7/14 TEA2037A Line Output (pin 14) It is an open collector output which is able to drive pulse current of 800mA for a rapid discharging of the darlington base. The output pulse time is 22s for a 64s period. The oscillator thresholds are internally fixed by resistors. The oscillator is synchronized during the Figure 9. Frame Oscillator VCC1 INPUT CURRENT COMPENSATION last half free run period. The input current during the charge of the capacitor is less than 100nA. Frame Output Amplifier This amplifier is able to drive directly the frame yoke. Its output is short circuit and overload protected; it contains also a thermal protection. 1 Frame Sync Pulse To Frame Amplifier 8/14 TEA2037A TYPICAL APPLICATION FOR DISPLAY UNITS Figure 10. Application without flyback generator and with sync-pulse drive; yoke: 72mH, 40 VCC 28V 1k VCC1 820k 180nF 2.2 100nF 1 10k 15 TEA2037A 15k 47nF 22nF 11 10 100k 2.2nF 2.2nF 33.2k 9 14 VCC 470 1/2W 10 6 220nF 470F 470k 470k 8 1k 100 2.2F 47 1N4148 1N4003 47F 180nF Video 560k 15 TEA2037A 15k 47nF 22nF 11 10 100k 3.9k 2.2nF 2.2nF 33.2k 9 14 VCC 470 1/2W 10 680pF 6 220nF 470F 470k 470k 2.2 100nF 1.5k 1 16 4 5 12 13 2 7 3 8 1k 100 2.2F 47 1N4148 6.8 56k 1N4148 100nF 6.8 56k 100F 16 4 5 12 13 2 7 3 1F 3.9k VCC1 Figure 11. Application with flyback generator and video; yoke: 72mH, 40 VCC 28V 1k VCC1 820k 100F 1F VCC1 9/14 TEA2037A TYPICAL APPLICATION FOR HIGH FREQUENCY MONITOR Table 14. Characteristics * Screen: 14'' Color * Frame deflection yoke: 11mH, 7, 750mA peak-to-peak * VCC = + 14V with flyback generator * Frame flyback time: 0.6ms * Vertical frequency: 72Hz * Vertical free-running period: 16ms (adjustable) * Horizontal frequency: 35kHz (adjustable) * Line flyback time: 5.5s * Capture range: 5s (@ sync pulse = 4.7s) * Input signal: negative TTL sync (line + frame) * Dissipated power: 1.4W (heatsink required) * Adjustments: - Vertical amplitude - Vertical Linearity - Vertical frequency - Horizontal frequency Figure 12. Characteristics 2.2k VCC 14V 270k VCC1 P3 470k 1000F 470k 1N4002 100F 47F 150nF 2.2 1N4148 1 10k Sync 15 TEA2037A Line Flyback 15k 47nF 22nF 11 10 47k 3.9k 6.8nF 1nF VCC 220 1/2W 10 9 14 680pF 100 18k P1 2.2F Line Darlington 22k 6 68k 330nF 39k 47k 8 Frame Yoke 11mH/7 16 4 5 12 13 2 7 3 100nF 2200F 22k 1F P4 47 VCC1 1N4148 10/14 1 180k TEA2037A PART NUMBERING Table 15. Order Codes Part Number TEA2037A Package POWERDIP (8+8) Temperature Range -25 to 85 C 11/14 TEA2037A PACKAGE MECHANICAL Table 16. POWERDIP(8+8) - Mechanical Data millimeters Symbol Min a1 B b b1 D E e e3 F i L Z 3.3 1.27 8.8 2.54 17.78 7.1 5.1 0.130 0.050 0.38 0.51 0.85 0.5 0.5 20 0.346 0.100 0.700 0.280 0.201 0.015 1.4 Typ Max Min 0.020 0.033 0.020 0.020 0.787 0.055 Typ Max inches Figure 13. POWERDIP(8+8) - Package Dimensions a1 I b1 E Z b B e3 e D 16 9 1 8 Note: Drawing is not to scale 12/14 F L TEA2037A REVISION HISTORY Table 17. Revision History Date September-1996 13-May-2004 Revision 1 2 First Issue Stylesheet update. No content change. Description of Changes 13/14 TEA2037A 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 express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2004 STMicroelectronics - All rights reserved STMicroelectronics GROUP OF COMPANIES Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States www.st.com 14/14 |
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