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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Pin 9 is the output of the current mirror that charges the series of Ca and Cb. 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 the energy lost during the retrace.

Later, the increasing flyback current reaches the peak value and then the flyback time is completed: 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.

TDA1675A.pdf

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. This publication supersedes and replaces all information previously supplied. Pin 12 is the inverting input of the amplifier. The internal clock opens the loop of tdq1675a amplifier and lets pin 1 floating so allowing the rising of the flyback. I9 I14 V1 Figure 1: 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.

A capacitor tda167a5 be connected to increase the performances from tdda1675a noise point of view. Pin 1 is the output of the power amplifier and it drives the yoke by a negative slope cur- Pin 2 rent ramply. An external capacitor Cf transfers the jump to gda1675a 2 see pin 2. This pin is also the input of the buffer stage. Pin 13 is an tda16755a collector output where the blanking pulse is available. 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.

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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 value shown tds1675a indicative only. Power amplifier T his amplifier is a voltage-to-current power converter, the transconductance of which is externally defined by means of a negative current feedback.

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. Rights to use these components in a I2C system, is granted provided that the system tdaa1675a to the I2C Standard Specifications as defined by Philips.

The flyback generator supplies the yoke too.

TDAA NTE Equivalent NTE INTEGRATED CIRCUIT T – Wholesale Electronics

Blanking generator and CRT protection This circuit is a pulse shaper and its output goes high during the blanking period or for CRT protection. C 0 0 50 A EPS 5 10 V1 12 9 12 5 A Pin 11 is the non-inverting input. A clock pulse is generated.

The external 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.

Pin 10 is the output of the buffer stage and it is internally coupled to the inverting input of the power amplifier through R1. Pin 15 is the output of the flyback generator that, when driven, jumps from low to high condition.

The internal clock turns off the lower power output stage to start the flyback. The output stage of tda1765a 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.

It is a full performance and very efficient vertical deflection circuit intended for direct drive of the yoke of o colour TV tda6175a tubes. Pin 14 is the main supply voltage input VS positive.

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The tra1675a of the power output stage is forced at this pin. When the current across the yoke changes its direction, the output of the flyback generator falls down to the main supply voltage and it is stopped by means of the saturated output darlington at a high level.

Specifications mentioned in this publication are subject to change without notice. TBL Dimensions Information furnished is believed to be accurate and reliable. The power output stage is thermally tda167a5 by sensing the junction temperature and then by putting off the current sources of the power stage.

Pin 4 is the inverting input of the amplifier used as integrator.

Peak Output Current 0 0. If the flyback pulse is absent short cirucit or open cirucit of the yokethe blanking output remains td1675a so allowing the CRT protection. At this pin the non-inverting input reference voltage supplied by the voltage regulator can be measured.

At this time the flyback generator starts tdaa1675a supply the power output amplifier output stage by a diode inside the device. Pin 7 The resistance between pin 7 and ground defines the current mirror current and than the height of the scanning. The internal clock pulse stops the increasing ramp by a very fast discharge of the capacitor a new voltage ramp is immediately allowed.

EPS 8 spring clip being sufficient.

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The Sync input pulse at the Sync gate lowers the level of the upper threshold and than it controls the period duration. An external network, Ra and Rb, defines the DClevel across Cy so allowing a correct centering of the output voltage.

Re and the Boucherot cell are used to stabilize the power amplifier. Crossing the main supply voltage at pin 14, the flyback pulse front end drives the flyback generator in such a way allowing its output to reach and overcome the main supply voltage, starting from a low condition forced during the trace period.