cupoftea
Advanced Member level 6
Hi,
We've always been lucky putting little bias supply SMPS's under power inductors,
but wonder if there are cases of it not working out?
We have a 130W Offline Two Transistor Forward, and due to room constraints, we wish to put the
secondary side 12V Bias Buck converter under the output inductor. We will of course,
have a layer of shielding copper on the top layer to shield the RT6208 based Buck from the noisy
switching nodes of the inductor. Is this bona fide?...
...or were we just very fortunate to have got away with it so many times
in the past?
After all, the whole reason of having eg, "shielded" inductors, is so that
people can put sensitive signal components and tracks beneath them on the PCB.
RT6208
The delta V of the switching node connected to the inductor is 200V at max.
We've always been lucky putting little bias supply SMPS's under power inductors,
but wonder if there are cases of it not working out?
We have a 130W Offline Two Transistor Forward, and due to room constraints, we wish to put the
secondary side 12V Bias Buck converter under the output inductor. We will of course,
have a layer of shielding copper on the top layer to shield the RT6208 based Buck from the noisy
switching nodes of the inductor. Is this bona fide?...
...or were we just very fortunate to have got away with it so many times
in the past?
After all, the whole reason of having eg, "shielded" inductors, is so that
people can put sensitive signal components and tracks beneath them on the PCB.
RT6208
The delta V of the switching node connected to the inductor is 200V at max.
Last edited:
