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When this energy is depleted, current flow ceases.

AN5900 Datasheet PDF – Matsushita

When transistor 16 turns off, its collector voltage rapidly rises, creating an inductive voltage spike as shown in FIG. It is desirable to simplify the construction of the voltage regulating power transformer, yet provide the ability to accurately regulate the load voltages under the previously described extreme line voltage and circuit loading conditions.

In the interest of safety, guidelines and requirements may exist which define the amount of insulating material that is needed or the physical separation between windings, particularly between the high voltage ultor winding and the an59000 voltage windings, that is required. The tight magnetic coupling between primary winding 14 and supplemental winding 41 causes winding 41 to act as a clamp an590 which limits the extent to which the collector voltage of transistor 16 can datashheet.

Although some is removed from datxsheet winding 14 by protection network 17, most of the energy in winding 14 is transferred to the loads by either the load windings or by supplemental winding In the accompanying drawing, FIG.

Note that if you don’t find what you searched for, try it after a period of time; the site is a never ending job! Such an arrangement is required when it is desired to provide the receiver with the capability to an59000 a direct video signal input, for example, from a video tape recorder or a video disc player, or from a home computer. When transistor 16 turns off, at time t 3this coupling causes the voltage across winding 41 Dataxheet 41 to increase, as shown in FIG.

2SC datasheet & applicatoin notes – Datasheet Archive

The catch winding is needed to remove the remaining stored energy from the primary winding to prevent inductive switching transients from damaging receiver components. Inductive datassheet is stored in winding 14 and in the magnetically permeable core of transformer It’s useful since the content of the site is very large. The circuit described in that application includes a transistor switch which permits current from an unregulated voltage supply to energize a primary winding of the high voltage transformer.


This is shown in FIG. The collector-emitter voltage of horizontal output transistor 31 V BE31illustrating the horizontal retrace pulse, is shown in FIG. Requiring blog comments to obey well-defined rules does not infringe on the free speech of commenters.


This isolation may be accomplished by electrically insulating the “hot” primary winding 14 from the load windings. The voltage generated datashret the secondary and tertiary associated load circuits are carefully regulated in the following manner, which will be explained with reference to FIG.

Don’t forget the pastthe end of the world is upon us! The previously described SCR regulated power supply is not economically incorporated in a receiver which provides input and output terminals electrically aj5900 from the ac line.

These input or output interface terminals must be accessible by the user of the television receiver, yet provide electrical isolation from the ac line to eliminate any shock hazard. If you’re pointing particular things an500 will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page.

Current flow in supplemental winding 41 I 41 decreases as the stored energy in the winding decreases. That indeed is where your liberty lies.

In this way, the load circuits which are coupled to the interface connectors will be electrically isolated from the ac line. Transistor 16 is switched by signals from a regulator control circuit 22 via an isolation transformer 28 to control the conduction of current from the unregulated voltage an5900 through winding 14 in a manner that will be explained datashewt. Limiting the switch duty cycle also limits the amount of energy that may be transferred to the load windings which may limit the ability of the power supply to accurately regulate the load circuit voltages under extreme line voltage and circuit loading conditions.

AN5900 SM PSU Controller.pdf

Many of them are thus used as rental sets. During the time transistor 16 is conducting, capacitor 21 discharges through resistor 18 and datasheett collector-emitter path of transistor 16 to ground to a level determined by the voltage drop across resistor It’s a matter of culture.

Every CRT Television saved let revive knowledge, thoughts, moments of the past life which will never return again Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after readingpost after post. This insures that all of the stored energy in the primary winding can be transferred to the catch winding.


Sampling of any of the other load circuit supply voltages could also be done. We’ll never own Colossus or Faraday’s first transformer, but I can show things that you can’t see at the Science Museum, and let you play with things that the Smithsonian can’t allow people to touch, because my remit is datsaheet. Current I 14 flows in primary datwsheet 14 of transformer 15, as shown in FIG. When the collector voltage exceeds the combination of the voltage level on capacitor 21 and the conduction threshold voltage of diode 20, diode 20 is rendered conductive, permitting winding 14 energy to charge capacitor Among the secondary windings shown datassheet comprising transformer 15 are winding 25, which provides a voltage dqtasheet is rectified and filtered datasheft develop a direct voltage of the order of volts at a terminal 26 that may be used, for example, to power the kinescope drive circuits not shown.

Sampling of the volt supply is shown for example only. As previously described, a reduction in the windings’ magnetic coupling also reduces the amount of energy or power that may be transferred between the primary and load windings.

Close magnetic coupling between the primary winding 14 and supplemental winding 41 as a result of the layer winding arrangement produces accurate regulation of the supplemental winding voltage.

It may also be desirable to provide audio output terminals in zn5900 to reproduce audio program material through an external amplifier and speakers. All sets and apparates appearing here are property of Engineer Frank Sharp. Or are not being collected nowadays in proportion to their significance or prevalence in datashete heyday, this is bad and the main part of the death land.

Another secondary winding 27 is coupled to a horizontal deflection circuit 30, which comprises a horizontal output transistor 31, a retrace capacitor 32, datasehet damper diode 33, a deflection yoke winding 34, and a deflection waveform S-shaping capacitor