determining minimum current loop bandwidth
- From: "Mook Johnson" <mook@xxxxxxxx>
- Date: Sat, 20 Oct 2007 08:29:19 -0500
I'm designing a current mode switching power supply with a load that will
have a very strong load current harmonic at 50Hz (repeating sine wave from
100mA -> 1A -> 100mA in 20mS). I need the current control loop to have
enough bandwidth to regulate this so it has less than 5% effect on the
output voltage. There is not sufficient bulk capacitance on the output to
supply the 50Hz current due to packaging so the control loop will see a
large portion of it (assume all of it).
How do i determime the bandwidth and loop gain required to achieve this
level of performance?
.
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