potatosnow
Newbie level 1
Hi,all
I am working on a project of on-chip DC-DC buck converter.
I know that the PWM block is used to transfer the error voltage(between Vout and Vref) to be the duty cycle.However I have no idea about how to choose the amplitude Vp of the sawtooth signal in PWM controller. Since the duty cycle d=(Verror/Vp). Can anyone figure out this problem?
My input voltage of the whole circuit is 1.8V, expected to get the output voltage 1.2V, so I prefer to choose the Vref as 1.2V.
Thank you!
I am working on a project of on-chip DC-DC buck converter.
I know that the PWM block is used to transfer the error voltage(between Vout and Vref) to be the duty cycle.However I have no idea about how to choose the amplitude Vp of the sawtooth signal in PWM controller. Since the duty cycle d=(Verror/Vp). Can anyone figure out this problem?
My input voltage of the whole circuit is 1.8V, expected to get the output voltage 1.2V, so I prefer to choose the Vref as 1.2V.
Thank you!