This may well be a silly question but here go's
I know that a frequency can be multiplied or divided relatively simply, as in there are chips to do the job. I assume not too expensive.
That said I currently have no idea how difficult this is and I do appreciate that the actual frequency in question will affect that.
I am in the process of building a control system for my PV's and genny and have decided to do that with an Arduino.
The Arduino has PWM outputs but I seriously doubt that they will be fast enough to directly drive a buck converter if I decided to implement one.
I am not entirely sure what can be achieved but it looks as though the base frequency can be set between 250Hz and 30kHz depending on the output in question and its internal timer settings.
There are two questions really:-
If I was planning to build a buck converter to drop 18v to 14v @ circa 7A how fast would it need to to be in order to be practical and efficient?
Can I directly multiply a PWM frequency, maintaining the duty cycle or would I be better using the 'slow' PWM to generate a reference voltage for an external oscillator generating a faster PWM signal?
Thanks in advance folks
Al
I know that a frequency can be multiplied or divided relatively simply, as in there are chips to do the job. I assume not too expensive.
That said I currently have no idea how difficult this is and I do appreciate that the actual frequency in question will affect that.
I am in the process of building a control system for my PV's and genny and have decided to do that with an Arduino.
The Arduino has PWM outputs but I seriously doubt that they will be fast enough to directly drive a buck converter if I decided to implement one.
I am not entirely sure what can be achieved but it looks as though the base frequency can be set between 250Hz and 30kHz depending on the output in question and its internal timer settings.
There are two questions really:-
If I was planning to build a buck converter to drop 18v to 14v @ circa 7A how fast would it need to to be in order to be practical and efficient?
Can I directly multiply a PWM frequency, maintaining the duty cycle or would I be better using the 'slow' PWM to generate a reference voltage for an external oscillator generating a faster PWM signal?
Thanks in advance folks
Al