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Descr:TV VERTICAL DEFLECTION BOOSTER
Group:Electronics > Components > Integrated circuits
Uploaded:06-08-2004
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TDA8178S TV VERTICAL DEFLECTION BOOSTER . . . . POWER AMPLIFIER FLYBACK GENERATOR THERMAL PROTECTION REFERENCE VOLTAGE DESCRIPTION Designed for monitors and high performance TVs, the TDA8178S vertical deflection booster delivers flyback voltages up to 90V. The TDA8178S operates with supplies up to 42V and provides up to 2App output current to drive to yoke. The TDA8178Sis offered in HEPTAWATT package PIN CONNECTIONS HEPTAWATT (Plastic Package) ORDER CODE : TDA8178S 7 6 5 4 3 2 1 Reference Voltage Output Stage Supply Output GND Flyback Generator Supply Voltage Inverting Input Tab connected to pin 4 8178S-01.EPS May 1993 1/6 TDA8178S BLOCK DIAGRAM + VS 2 6 3 FLYBACK GENERATOR 1 POWER AMPLIFIER 5 YOKE 7 REFERENCE VOLTAGE 4 THERMAL PROTECTION APPLICATION CIRCUIT (VS = 42V) + VS 2 6 3 1 TDA8178S 5 7 YOKE 4 Note : For values see "Easy Design of Vertical Deflection Stages" (software available from our sales offices) 2/6 8178S-03.EPS 8178S-02.EPS TDA8178S ABSOLUTE MAXIMUM RATINGS Symbol VS V5 , V6 V1 , V7 IO Supply Voltage (pin 2) Flyback Peak Voltage Amplifier Input Voltage Output Peak Current Non-repetitive, t = 2ms f = 50 or 60Hz, t 10µs f = 50 or 60Hz, t > 10µs I3 Ptot Tstg Tj Pin 3 DC at V5 < V2 Pin 3 Peak Flyback Current at f = 50 or 60Hz, tfly 1.5ms Total Power Dissipation at TC = 70 C Storage Temperature Junction Temperature o Parameter Value 50 100 + VS Unit V V A 2 2 1.8 100 1.8 20 - 40, + 150 0, +150 mA A o o C C THERMAL DATA Symbol Rth (j-c) Parameter Junction-case Thermal Resistance Max. Value 3 Unit o C/W ELECTRICAL CHARACTERISTICS (VS = 42V, TA = 25oC, unless otherwise specified) (refer to the test circuits - see Figure 1 next page) Symbol VS I2 I6 I1 V3L V5 Parameter Operating Supply Voltage Range Pin 2 Quiescent Current Pin 6 Quiescent Current Amplifier Bias Current Pin 3 Saturation to GND Quiescent Output Voltage VS = 42V VS = 35V V5L V5H VD5 - 6 VD3 - 2 V7 V7/VS KT Output Saturation Voltage to GND Output Saturation Voltage to Supply Diode Forward Voltage between Pins 5-6 Diode Forward Voltage between Pins 3-2 Internal Reference Reference Voltage Drift versus VS Reference Voltage Drift versus Tj VS = 24 to 42V Tj = 0 to 125 C 6 V7 10 KT = Tj V7 o Test Conditions I3 = 0 I3 = 0 V1 = 1V I3 = 20mA Ra = 3.9k Ra = 5.6k I5 = 0 I5 = 0 Min. 10 Typ. 10 20 - 0.2 1.3 Max. 42 20 40 -1 1.8 25 18.5 1.5 2.6 3 3 2.3 4 150 Unit V mA mA µA V V 23.4 17 24.2 17.8 1.2 2.2 1.5 1.5 I5 = 1A - I5 = 1A ID = 1A ID = 1A 2.1 V V V V V mV/V ppm/ C o 2.2 2 100 R1 Tj Input Resistance Junction Temperature for Thermal Shutdown 200 140 k o C 3/6 8178S-03.TBL 8178S-02.TBL 8178S-01.TBL W TDA8178S FIGURE 1 : DC Test Circuits Figure 1a : Measurement of I1, I2, I6, V7, V7/VS + VS I2 I6 Figure 1b : Measurement of V5H + VS 2 6 V5H 2 5 6 TDA8178S S1 1 10k 1 a b TDA8178S 5 7 4 I1 V7 1V 8178S-04.EPS 4 - I5 1V 8178S-05.EPS S1 : (a) I2 and I6, (b) I1 Figure 1c : Measurement of V3L, V5L + VS Figure 1d :

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