areebaa
Member level 2
hi , I designed conventional single inductor two output dc-dc boost converter in psim. means inductor energy is stored and thrown to 1 output at one cycle and charged and discharged to the 2nd output at next cycle. the two outputs are sensed by using voltage dividers and time multiplexed using analog mux at the speed of half of the switching freq to be process in digital control stage. my digital stage is very simple pid with z transfer func. after than pwm controls the switches on/off time.
the design works well.
vin 2V
vo1 4V
vo2 6V
fs =1M
L=4uH
c=50uF
etc...
so my question is in above scenario, does the bandwidth in the control should be greater than switching frequency or less than switching frequency?
thanks
the design works well.
vin 2V
vo1 4V
vo2 6V
fs =1M
L=4uH
c=50uF
etc...
so my question is in above scenario, does the bandwidth in the control should be greater than switching frequency or less than switching frequency?
thanks