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PWM signla o 0-10V

Andreas Christodoulou
Prodigy 20 points

Hi there,

I was looking to change a PWM signal into 0-10V. I started looking on low pass filters but due to the fact that it is for industrial use i decided to go for a DAC chip. The problem that i have right now is that the PWM signal is 0-24V and the dc voltage i needs is 0-10V. Is there any chip that i could use for this operation? I would like to do this operation with a single chip.

Thank you,

Regards,

Andreas

  • 0
    TI__Genius 10615 points

    Hi Andreas,

    I am not sure I understand what you mean.

    I think that you have a PWM input of 0-24V and you want to generate a 0-10V output. Correct me of I'm wrong.

    Andreas Christodoulou said:
    I started looking on low pass filters but due to the fact that it is for industrial use i decided to go for a DAC chip.

    Using a low-pass filter to step down the voltage from the PWM signal should work if you don't require high precision or high update rates. If your concern is loading the output of the RC filter, you can use a buffer at the output of the RC to isolate the point of load.

    We don't have any chips that can convert a PWM signal into a  voltage range. All of our devices use serial and parallel digital interfaces to communicate with the Master device (usually an MCU).

    I have a few questions to better assist you.

    • How is the 0-24V PWM signal being generated?
    • What level of precision do you need?
    • Do you have a schematic you can share?
    • What are the applications requirements?

  • 0 in reply to Eugenio Mejia
    Prodigy 20 points

    Hi Eugenio,

    Yes that is right. The problem is that i do require high precission and high update rate. This is due to the fact that i am planning to use sach a device to run a motor with 0-10 instead of PWM. The 0-24 signal s generated from a microcontroller. I am not sure how they do that. They jaust asked for ideas on how they could change the pwm to 0-10.

    Regards,

    Andreas