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PWM source in Tina

Paul Murphy90
Prodigy 210 points

Other Parts Discussed in Thread: TINA-TI

I need to create 4 signal sources to drive a bridge.

PWM 3.3V pp and be able to adjust rise and fall times and dead zones.

I tried doing it with 4 voltage sources and using the square wave function but I cant seem to offset the timing to control the bridge properly.

In LTSpice there is a PWM source where you can quickly set up a signal with all of above is there not a dedicated PWM source in Tina?

  • 0
    TI__Mastermind 41310 points

    Paul,

    I have not used a PWM source in LTSpice. I have used a PWL source in TINA-TI where you can simply enter in the time/value pairs for the signal you are trying to produce. I have also generated a PWM source using two sine waves and the Controlled source wizard. I am attaching two examples that may help.

    Comparator_fn.TSC

    periodic_pulse.TSC

    The first is simply a comparator (made with the Controlled Source Wizard) that compares two sine waves of different frequency. this would be a basic PWM function, however, I believe that you are desiring more control over the output. I have seen examples where a triangle waveform (sawtooth, PWL, etc.) was used as well.

    The second example simply shows how to make a single waveform periodic in TINA-TI using the PWL source. If you know once cycle of the PWM signal, you can make it periodic using this method.

  • 0 in reply to Britt Brooks - Online Design Tools
    Prodigy 210 points
    Thank you
    I see "Piecewise linear" is what I'm looking for