TDA1675A PDF

TDAA Vertical Deflection Circuit. SYNCHRONISATION CIRCUIT ESD PROTECTED PRECISION OSCILLATOR AND RAMP GENERATOR POWER. View from ELEC 1 at Perm State University. TDAA VERTICAL DEFLECTION CIRCUIT SYNCHRONISATION CIRCUIT ESD. Find great deals for TDAA Vertical Deflection Circuit Original SGS. Shop with confidence on eBay!.

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TBL Dimensions Information furnished is believed to be accurate and reliable. EPS 8 spring clip being sufficient. The series network Rc and Cc, in conjunction with Ra and Rb, applies at the feedback input I2 a small part of the parabola, available across Cy, and AC feedback voltage, taken across Rf. The tda16675a components Rc, Ra and Rd, produce the linearity correction on the output scanning currentIy and their values must be optimized for each type of CRT.

The output of the power amplifier pin 1 falls under the main supply voltage and the output of the flyback generator is driven for a low state so allowing the flyback capacitor Cf to restore tda1675s energy lost during the retrace. Later, the increasing flyback current reaches the peak value and then the flyback time is completed: At this time the flyback generator starts to supply the power output amplifier output stage by a diode inside the device.

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Pin 9 is the output of the current mirror that charges the series of Ca and Cb. Re and the Boucherot cell are used to stabilize the power amplifier. Peak Output Current 0 0. Flyback generator This circuit supplies both the power amplifier output stage and the yoke during the most of the duration of the flyback time retrace. Pin 11 is the non-inverting input.

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The internal clock turns off the lower power output stage to start the flyback. A clock pulse is generated. The value shown is indicative only.

Pin 1 is the output of the power amplifier and it drives the yoke by a negative slope cur- Pin 2 rent ramply. Power amplifier T his amplifier is a voltage-to-current power converter, the transconductance of which is externally defined tea1675a means of a negative current feedback.

Pin 7 The resistance between pin 7 and ground defines tca1675a current mirror current and than the height of the scanning. C 0 0 50 A Blanking generator and CRT protection This circuit is a pulse shaper and its output goes high during the blanking period or for CRT protection.

Pin 4 is the inverting input of the amplifier used as integrator. It is a full performance and very efficient vertical deflection circuit intended for direct drive of the yoke of o colour TV picture tubes.

The power output stage is thermally protected by sensing the junction temperature and then by putting off the current sources of the power stage. During the trace time the supply voltage is obtained from the main supply voltage VS by a diode, while during the retrace time this pin is supplied from the flyback generator.

If the flyback pulse is absent short cirucit or open cirucit of the tda1675the blanking output remains high so allowing the CRT protection.

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TDAA NTE Equivalent NTE INTEGRATED CIRCUIT T – Wholesale Electronics

However, SGS-THOMSON Microelectronics 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. The Sync input pulse tsa1675a the Sync gate lowers the level of the upper threshold and than it controls the period duration.

Pin 15 is the output of the flyback generator that, when driven, jumps from low to high condition. Pin 10 is the output of the buffer stage and it is internally coupled to the inverting input of the power amplifier through R1. Between the heatsink and the package, it is better to insert a layer of silicon grease, to optimize the thermal contact; no electrical isolation is needed between the two surfaces. An integrated diode stops the rising of this output increase and the voltage jump is transferred by means of capacitor Cf at the supply voltage pin of the power stage pin 2.

The flyback generator supplies the yoke too.

TDA1675A.pdf

Specifications mentioned in this publication are subject to change without notice. The output stage of the power amplifier is supplied by the main supply during the trace period, and by the flyback generator circuit during the most of the duration of the flyback time. VS 1 25