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1、DATA SHEETProduct specification 2003 Oct 31INTEGRATED CIRCUITSTDA4864J; TDA4864AJVertical deflection booster2003 Oct 31 2Philips Semiconductors Product specificationVertical deflection booster TDA4864J; TDA4864AJFEATURES Power amplifier with differential inputs Output current up to 2.5 A (p-p) High
2、vertical deflection frequency up to 200 Hz High linear sawtooth signal amplification Flyback generator: TDA4864J: separate adjustable flyback supplyvoltage up to 60 V TDA4864AJ: internally doubled supply voltage(two supply voltages only for DC-coupled outputs).GENERAL DESCRIPTIONThe TDA4864J and TDA
3、4864AJ are deflection boostersfor use in vertical deflection systems for frame frequenciesup to 200 Hz.The TDA4864J needs a separate flyback supply voltage,so the supply voltages are independently adjustable tooptimize power consumption and flyback time.For the TDA4864AJ the flyback supply voltage w
4、ill begenerated internally by doubling the supply voltage andtherefore a separate flyback supply voltage is not needed.Both circuits provide differential input stages.QUICK REFERENCE DATAMeasurements referenced to pin GND.ORDERING INFORMATIONSYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITVP1supply v
5、oltage 1 9 30 VVP2supply voltage 2 for vertical output VP1 1 60 VVFBflyback supply voltage of TDA4864J VP1 1 60 VVP3flyback generator output voltage ofTDA4864AJIV-OUT= 1.25 A 0 VP1+ 2.2 VViinput voltage onpin INN 1.6 VP1 0.5 Vpin INP 1.6 VP1 0.5 VIP1supply current 1 during scan 610mAIP2quiescent sup
6、ply current 2 IV-OUT=0 25 60 mAIV-OUT(p-p)vertical deflection output current(peak-to-peak value)2.5 ATambambient temperature 20 +75 CTYPE NUMBERPACKAGENAME DESCRIPTION VERSIONTDA4864J DBS7P plastic DIL-bent-SIL power package; 7 leads(lead length 12/11 mm); exposed die padSOT524-1TDA4864AJ2003 Oct 31
7、 3Philips Semiconductors Product specificationVertical deflection booster TDA4864J; TDA4864AJBLOCK DIAGRAMhandbook, full pagewidthTDA4864JC1 C4 C2DIFFERENTIALINPUTSTAGEVERTICALOUTPUT76 5 43 2 1REFERENCECIRCUITFLYBACKGENERATORVP1VNGNDdeflectioncoilR4fromdeflection controllerTHERMAL PROTECTIONVFBV-OUT
8、R1VFVP2RS1VPCS1RPR3R2D1INNINPFig.1 Block diagram of TDA4864J.2003 Oct 31 4Philips Semiconductors Product specificationVertical deflection booster TDA4864J; TDA4864AJhandbook, full pagewidthTDA4864AJDIFFERENTIALINPUTSTAGEVERTICALOUTPUT76 5 43 2 1REFERENCECIRCUITFLYBACKGENERATORVP1VNGNDdeflectioncoilf
9、romdeflection controllerTHERMAL PROTECTIONVP3V-OUTR1VP2RS1VPCS1CFRPR3R2D1INNINPR6R5C1C2Fig.2 Block diagram of TDA4864AJ.2003 Oct 31 5Philips Semiconductors Product specificationVertical deflection booster TDA4864J; TDA4864AJPINNINGSYMBOLPINDESCRIPTIONTDA4864J TDA4864AJVP11 1 positive supply voltage
10、1VFB2 flyback supply voltageVP3 2 flyback generator outputVP23 3 supply voltage 2 for vertical outputGND 4 4 ground or negative supply voltageV-OUT 5 5 vertical outputINN 6 6 inverted input of differential input stageINP 7 7 non-inverted input of differential input stagehandbook, halfpageVP1VFBVP2GN
11、DV-OUTINNINP1234567TDA4864JXXXxxxFig.3 Pin configuration of TDA4864J.handbook, halfpageVP1VP3VP2GNDV-OUTINNINP1234567TDA4864AJXXXxxxFig.4 Pin configuration of TDA4864AJ.2003 Oct 31 6Philips Semiconductors Product specificationVertical deflection booster TDA4864J; TDA4864AJFUNCTIONAL DESCRIPTIONBoth
12、the TDA4864J and TDA4864AJ consist of adifferential input stage, a vertical output stage, a flybackgenerator, a reference circuit and a thermal protectioncircuit.The TDA4864J operates with a separate flyback supplyvoltage (see Fig.1) while the TDA4864AJ generates theflyback voltage internally by dou
13、bling the supply voltage(see Fig.2).Differential input stageThe differential sawtooth input current signal (coming fromthe deflection controller) is connected to the inputs(inverted signal to pin INN and non-inverted signal topin INP). The vertical feedback signal is superimposed onthe inverted sign
14、al on pin INN.Vertical output and thermal protectionThe vertical output stage is a quasi-complementaryclass-B amplifier with a high linearity.The output stage is protected against thermal overshoots.For a junction temperature Tj 150 C this protection willbe activated and will reduce then the deflect
15、ion current(IV-OUT).Flyback generatorThe flyback generator supplies the vertical output stageduring flyback.The TDA4864J is used with separate flyback supplyvoltage to achieve a short flyback time with minimizedpower dissipation.The TDA4864AJ needs a capacitor CFbetweenpins VP3and VP2(see Fig.2). Ca
16、pacitor CFis chargedduring scan, using the external diode D1 and resistor R5.During flyback the cathode of capacitor CFis connected tothe positive supply voltage and the flyback voltage is thentwice the supply voltage. For the TDA4864AJ theresistor R6 in the positive supply line can be used toreduce the power consumption.In parallel with the deflection coil a damping resistor RPand an RC combination (RS1= 5.6 and CS1= 100 nF)a
