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TEA2028B Dataheets PDF



Part Number TEA2028B
Manufacturers ST Microelectronics
Logo ST Microelectronics
Description Color TV Scanning and Power-Supply Processor
Datasheet TEA2028B DatasheetTEA2028B Datasheet (PDF)

TEA2028B COLOR TV SCANNING AND POWER SUPPLY PROCESSOR SMPS CONTROL ERROR AMPLIFIER AND PHASE MODULATOR SYNCHRONIZATION WITH HORIZONTAL DEFLECTION SECURITY CIRCUIT AND START-UP PROCESSOR OUTPUT PULSES ARE SENT TO THE PRIMARY SMPS IC TEA2261 THROUGH A LOW COST SYNCHRO PULSE TRANSFORMER PIN CONNECTIONS LINE MONOSTABLE CAPACITOR SAFETY FRAME BLANKING INPUT FRAME SAW-TOOTH OUTPUT FRAME BLANKING OUTPUT FRAME RAMP GENERATOR GROUND POWER SWITCH MODE POWER SUPPLY OUTPUT V CC S.M.P.S. INPUT REGULATION HO.

  TEA2028B   TEA2028B



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TEA2028B COLOR TV SCANNING AND POWER SUPPLY PROCESSOR SMPS CONTROL ERROR AMPLIFIER AND PHASE MODULATOR SYNCHRONIZATION WITH HORIZONTAL DEFLECTION SECURITY CIRCUIT AND START-UP PROCESSOR OUTPUT PULSES ARE SENT TO THE PRIMARY SMPS IC TEA2261 THROUGH A LOW COST SYNCHRO PULSE TRANSFORMER PIN CONNECTIONS LINE MONOSTABLE CAPACITOR SAFETY FRAME BLANKING INPUT FRAME SAW-TOOTH OUTPUT FRAME BLANKING OUTPUT FRAME RAMP GENERATOR GROUND POWER SWITCH MODE POWER SUPPLY OUTPUT V CC S.M.P.S. INPUT REGULATION HORIZONTAL OUTPUT S. SANDCASTLE OUTPUT HORIZONT AL FLYBACK INPUT HORIZO NTAL SAW-TOOTH CURRENT REFERENCE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 . . . . . . . . . . . . . . . DEFLECTION CERAMIC 500kHz RESONATOR FREQUENCY REFERENCE NO LINE AND FRAME OSCILLATOR ADJUSTMENT REFERENCE DUAL PLL FOR LINE DEFLECTION HIGH PERFORMANCE SYNCHRONIZATION SUPER SANDCASTLE OUTPUT FRAME BLANKING WITH SAFETY CIRCUIT VIDEO IDENTIFICATION CIRCUIT AUTOMATIC 50/60Hz STANDARD IDENTIFICATION EXCELLENT INTERLACING CONTROL SPECIAL PATENTED FRAME SYNCHRO DEVICE FOR VCR OPERATION FRAME SAW-TOOTH GENERATOR DESCRIPTION The TEA2028B is a complete (horizontal and vertical) deflection processor with secondary to primary SMPS control for color TV sets. DIP28 (Plastic Package) ORDER CODE : TEA2028B SAFETY INPUT VIDEO INPUT H. SYNCHRO CAPACITOR (tip level) VIDEO IDENTIFICATION CAPACITOR MUTING + 50/60Hz IDENT. OUTPUT V.C.R. INPUT PHASE COMPARATOR Φ1 CAPACITOR GROUND SUBSTRAT www.DataSheet4U.com 2028B-01.EPS FRAME SYNCHRO ADJ USTMENT CAPACITOR V.C.O. INPUT V.C.O. OUTPUT V.C.O. 90° REF. PHASE COMPARATOR Φ2 CAPACITOR STARTING AND SAFETY CAPACITOR August 1993 1/9 www.DataSheet4U.com 2/9 TEA2028B BLOCK DIAGRAM 50/60Hz MUTING OUTPUT VCR SWITCHING INPUT 503kHz SUBSTRAT GROUND 25 24 23 19 18 22 21 20 TEA2028B SUBST VCR INPUT H. SYNC 26 ϕ1 DET 27 VIDEO IDENTIFICATION ϕ1 INHIBITION TIME CONSTANT SWITCHING HORIZONTAL SYNCHRO AND FRAME SYNCHRO VCO 500kHz 17 VIDEO INPUT 2µs SAFETY INPUT HORIZONTAL LOGIC TIMING ϕ2 16 28 50/60Hz FRAME TIMING IDENTIFICATION LOGIC LINE MONOSTABLE V R 1.26V 15 3.3k Ω VCC 1 V R 1.26V SWITCH ON/OFF SAFETY CIRCUIT SAFETY LOGIC REFERENCE CURRENT VOLTAGE 14 2 FRAME ERROR AMPLIFIER H. SAWTOOTH GENERATOR SOFT STARTING CIRCUIT 13 FRAME BLANKING SAFETY FRAME SAWTOOTH OUTPUT 50/60 Hz 3 H. INHIBIT FRAME BLANK OUTPUT H. OUTPUT SUPER SANDCASTLE 12 VR 1.26V HORIZONTAL FLYBACK INPUT FRAME SAWTOOTH OUTPUT FRAME SAFETY S.M.P.S. OUTPUT S.M.P.S. ϕ MODULAT. 4 5 6 7 8 V CC 9 10 11 S SC OUTPUT V CC POWER GROUND FRAME SAWTOOTH www.DataSheet4U.com HORIZONTAL OUTPUT FRAME BLANKING OUTPUT 2028B-02.EPS TEA2028B GENERAL DESCRIPTION Introduction This integrated circuit uses I 2L bipolar technology and combines analog signal processing with digital processing. Timing signals are obtained from a voltage-controlled oscillator (VCO) operating at 500kHz by means of a cheap ceramic resonator. This avoids the frequency.


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