PWM signal for boost converter

Discussion in 'General Electronics Chat' started by anhnha, Mar 4, 2016.

  1. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    I want to use PWM for boost converter. I already have a switching signal with duty cycle 50%. From this signal, how can I generate PWM signal to control ON/OFF of switch? I don't want to use microcontroller. I want to design myself for all this.
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    You could use the signal to trigger a monostable circuit having a variable pulse width.
     
  3. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    Thanks. Could you provide the circuit so I can study on?
     
  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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  5. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    So you have a pwm signal already generated, and want to use it in your boost converter?
     
  7. anhnha

    Thread Starter Active Member

    Apr 19, 2012
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    I already a switching signal with duty cycle 50%. However, I am thinking about how to modulate or ajust pulse width this signal to control boost converter.
     
  8. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Well to adjust it, you need to show the circuit of the pwm generator,then we can help you further.
     
  9. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Here's one possibility. The graph shows the output variation in response to a 0V to 5V sweep on the Control input.
    VariablePulseWidth.PNG
     
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