Seeker_IN
Newbie level 5
Consider the attached schematics, The switching frequency is 250KHz, So, The cross over frequency be 250/5 = 50KHz. My ADC is 12bit able to sample at 1MS/s.(Ignore any other design spec for now). The doubts are below
1. For ADC selection-sampling rate the switching frequency should be considered while determining the sampling rate or the Cross over frequency ?
2. for the buffer used the Bandwidth should be 2 to 5 times the cross over frequency or the switching frequency?
3. In case i want to use current shunt amplifier for current sensing, How to select from the Bandwidth point of view ?
In general i wanted to understand how the Opamp parameter be looked at for converter design - unity gain BW, 3db bandwidth etc, used in control loop ?
1. For ADC selection-sampling rate the switching frequency should be considered while determining the sampling rate or the Cross over frequency ?
2. for the buffer used the Bandwidth should be 2 to 5 times the cross over frequency or the switching frequency?
3. In case i want to use current shunt amplifier for current sensing, How to select from the Bandwidth point of view ?
In general i wanted to understand how the Opamp parameter be looked at for converter design - unity gain BW, 3db bandwidth etc, used in control loop ?