I am working on a motor control project and need to convert a DC control signal into a PWM signal to drive a MOSFET. The DC signal is coming out of an analog PI controller.
Is there a simple way to do this? I have looked at some 555 timer circuits, but haven't found good design equations. I need an almost 0 - 100% duty cycle on the PWM. What voltage range corresponds to those duty ratios on a typical 555 (pin 5 I believe)?
Are there chips I can buy to just make the conversion? Am I better off building my own triangle wave oscillator and comparator PWM circuit?
Any help is much appreciated. Thanks.
Is there a simple way to do this? I have looked at some 555 timer circuits, but haven't found good design equations. I need an almost 0 - 100% duty cycle on the PWM. What voltage range corresponds to those duty ratios on a typical 555 (pin 5 I believe)?
Are there chips I can buy to just make the conversion? Am I better off building my own triangle wave oscillator and comparator PWM circuit?
Any help is much appreciated. Thanks.