Synchronization UC3842/43

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style="display:inline-block;width:728px;height:90px" data-ad-client="ca-pub-2650537455752702" data-ad-slot="5163197671"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> <bR> <div> <B><IMG SRC="53ecc7f0.gif" border=0 width="460" height="639" ALT="Eksterna sinkronizaciju UC3842, UC3843" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <div>      Scheme represents only the oscilatorski circle UC3842 / 43. Connection has this characteristics:</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">UC3842 / 43 does not use the all oscillator already is the oscilatorski circle imposed outside. So can work and on strong short frequencies or even completely has been stopped (0..200kHz)</div> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">After the getting positive synchronization edge complex firstly generates the pause from approximately 200ns, and and then generates the impulse</div> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Duration of generated impulse has been limited the duration of positive part of synchronization impulse (if not did happen that the current crosses the limited value  Isen > 1V)</div> <bR> <div>      Use: </div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Multichannel generators of impulse or converters with the synchronized work. Example interchangeably or in the ring sequence.</div> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">The generator of impulse</div> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">The synchronous generator of electric impulses</div> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">The outgoing driver with the protection from the overload (at overloads shorten the impulse) e.g. for the PWM voltage which manages DC engine (12, 24, 220V).</div> <bR> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:inline-block;width:728px;height:90px" data-ad-client="ca-pub-2650537455752702" data-ad-slot="5163197671"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> <bR> <bR> <div> Example of usage for the making PWM of exit degree with the electric control (automatically shortens the impulse when achieves the maximalna current). Factor fills the impuls from 0 to 99 % (at 100 % could will happen that the exit excluded himself when the current crosses maximal allowed). As necessary was able added coils in the circle of engine because of the mitigating electric spitz and better tolerabilities of possible short-circuiting in the engine.</div> <bR> <div> <IMG SRC="53f168d0.gif" border=0 width="534" height="397" ALT="PWM driver DC motora sa nadstrujnom zaštitom" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div>      Warnings:</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Complex is not appropriate for use with UC3844 / 45 because these controllers have the inner divider of frequency of oscillators.</div> <div> <IMG BORDER="0" SRC="Symb075c00b700dc00000000.gif" HEIGHT="15" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Synchronization are same complexes in the correct same time not anymore completely possible. If better looked over, start of impulse will depend about the duration pauses, who again depends from characteristics of oscillators of single chip and tolerances capacity CT and parallel him resistor from 4,7K. By durations of impulses when uses current senzing depends on parameters of circle (coils, starting current through the coil, shunt tolerance,). For expects that starts of impulse will be inside 10-50ns.</div> <bR> <div>      Complex is applied in once 10 channel generator with 5 possible ways synchronization. Use of the ring synchronization (the every degree moves in the activation for 1 / 10 period) on 150kHz basic frequencies whole complex functions as if works on 1,5MHz. The additional characteristic is that is the current from the source flatter. By the fact itself is smaller losses the voltage on feeder lines.</div> <bR> <bR> </td> </tr></table></body>