TDA1675A STMicroelectronics, TDA1675A Datasheet
TDA1675A
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TDA1675A Summary of contents
Page 1
... CRT SCREEN PROTECTION WHICH BLANKS THE BEAM CURRENT IN THE EVENT OF LOSS OF VERTICAL DE- FLECTION CURRENT DESCRIPTION The TDA1675A is a monolithic integrated circuit in ® 15-lead Multiwatt package full performance and very efficient vertical deflection circuit intended o for direct drive of the yoke of 110 tubes. It offers a wide range of applications also in portable CTVs, B& ...
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... TDA1675A BLOCK DIAGRAM BLANKING OUT 13 BLANK GENERATOR AND CRT PROTECTION OSCILLATOR SYNC. SYNC. 7 HEIGHT ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage at Pin Flyback Peak Voltage Sync. Input Voltage Power Amplifier Input Voltage Voltage at Pin Output Current (non repetitive 2ms O I Output Peak Current 50Hz t > ...
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... unless otherwise specified) S amb Test conditions 15V 35V 2. 15V 390 , 1.2A 1. 35V Figure 75k Figure TDA1675A Min. Typ. Max. Unit 0. 18.5 20 21 16.4 17.8 19.5 V 6.9 7.5 8 1.4 V 1.6 2.2 V 0.45 V 6.3 6 4.1 4.4 4.7 V 0. ...
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... TDA1675A AC ELECTRICAL CHARACTERISTICS (Refer to A.C. test circuit of fig Symbol Parameter I Supply Current S I Sync Input Current Required to Sync 5 V Flyback Voltage 1 V Peak-to-peak Oscillator Sawtooth 3 Voltage V Start Scan Level of the Input Ramp 10TH(L) t Flyback Time FLY t Blanking Pulse Duration BLANK f Free Running Frequency ...
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... TDA 1675A 0.1µ 0.1µF * 56k RT2 R5 LINEARITY 390k * R6 100k C6 0.1µF 100k Parameter o = 110 C j max o = 120 C j max TDA1675A ; 0. YOKE 1 R9 2.2 R11 330 C7 0.22µF 2. R10 R8 2% 120 R7 1000µF C9 910 25V 2% 47µF C8 10V R12 5% 2 ...
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... TDA1675A Figure 4 : Application Circuit for 110 + 10k BLANKING OUT 13 0.1µF SYNC. PULSE 4. 7. 330nF 15k 180k SERVICE SWITCH S1 RT1 HEIGHT * The value depends on the characteristics of the CRT. The value shown is indicative only. TYPICAL PERFORMANCE Symbol V Minimum supply voltage S I Supply current ...
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... TDA 1675A 0.1µ 0.1µF * 56k RT2 R5 LINEARITY 560k * R6 100k C6 0.1µF 220k Parameter o = 110 C j max o = 120 C j max TDA1675A = 1. YOKE 1 R9 2.2 R11 330 C7 0.22µF 2. R10 R8 2% 120 R7 2200µ 16V 2% 47µF C8 10V R12 5% 0.82 ...
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... TDA1675A Figure Board and Components Layout for the Application Circuits of Figures 3, 4 and scale RT1 R12 APPLICATION INFORMATION (Refer to the block diagram) Oscillator and sync gate (Clock generation) The oscillator is obtained by means of an integrator driven by a two threshold circuit that switches R ...
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... Blanking generator and CRT protection This circuit is a pulse shaper and its output goes high during the blanking period or for CRT protection. The input is internally driven by the clock pulse that defines the width of the blanking time TDA1675A and the Boucherot cell diode, S ...
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... TDA1675A when a flyback pulse has been generated. If the flyback pulse is absent (short cirucit or open cirucit of the yoke), the blanking output remains high so allowing the CRT protection. Pin open collector output where the blanking pulse is available. Voltage regulator The main supply voltage V ...
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... C system, is granted provided that the system conforms Standard Specifications as defined by Philips. TDA1675A Inches Typ. Max. 0.197 0.104 0.063 0.039 0.022 0.030 0.050 0.055 0.700 0.705 0.795 0.890 0.886 ...