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10V PWM driver

Muhammed Safvan
Prodigy 190 points


Hi

 I want to control a device by 10V PWM signal from my control board. The distance between the my controller board and controlled device is 100 meter away. My controller generating the 5V PWM signal, is there any possible IC mechanism to convert a 5V PWM to 10V PWM with 100 meter error less traveling distance.

Muhammed 

  • 0
    TI__Mastermind 25705 points

    Muhammed,

    From my understanding, you wanted to implement 2 functions, 1) convert 5V PWM to 10 PWM, 2) transmit over 100 meter distance. For task 1), I'm not an expert. But it looks you may want to use a level shifter. For task 2), RS-485 signaling supports long distance communication. A possible theme could be like:

    5V PWM -> RS-485 TX -> RS-485 RX -> 5V PWM -> level shifter -> 10V PWM.

    Regards,

    Hao

  • 0 in reply to Hao L
    Prodigy 190 points

    Hao

     Thanks for your reply

    The End device only support the 10V PWM signal, Not RS485 signal,

    Can you know that, How much distance can travel 10V PWM (1Khz) signal through the 18 AWG wire.

  • 0 in reply to Muhammed Safvan
    TI__Mastermind 25705 points

    Muhammed,

    As I mentioned, you could use RS-485 to take care the long distance and level shifter for 10V PWM.

    One factor that limits long distance communication is the cable loss. 18 AWG wire has about 6 Ohm resistance per 1000 feet. At receiver end, the amplitude might become smaller than 10V, which needs to be higher than the receiver's threshold.

    Please let me know if you have more questions.

    Regards,

    Hao