1. mermerzac

    Thread Starter Member

    Feb 9, 2012
    30
    1
    Hi everyone!

    May I know what will be the output at C1 and C2 if i connect the PWM Control circuit as the picture attached below?
    I'm still not clear about this PWM TL494 operation after studying the datasheet.

    Thanks!!
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    They are the outputs to drive the driver transistor which I believe is a totem pole stage which handles the power switch drive.

    C1 & C2 will have pulses which is called the PWM signals.
     
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  3. mermerzac

    Thread Starter Member

    Feb 9, 2012
    30
    1
    oh i mean the two waveform frm C1 and C2 will be same?
     
  4. shortbus

    AAC Fanatic!

    Sep 30, 2009
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  5. mermerzac

    Thread Starter Member

    Feb 9, 2012
    30
    1
    thanks a lot!! i can solve the problem
     
  6. mermerzac

    Thread Starter Member

    Feb 9, 2012
    30
    1
    referring to pg 12 on the link http://www.ti.com/lit/an/slva001e/slva001e.pdf, if i want to get alternating output, i need to connect pin 13 to Vref right?
    will the output waveform at C1 and C2 has overlapping or it will be completely complementary without overlapping?
     
  7. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Yes to the Vref on pin 13.

    Figure #14 shows the timing diagram for the output. Page 13 explains the flip-flop logic of the output.
     
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