Can change of load on one winding affect output of other windings (Flyback SMPS)?

[siliconmike]

For a flyback SMPS, if the output [with feedback] is loaded, the
switching duty cycle goes up.

In this situation, what would happen to voltages on other outputs ?

(They remain constant I guess, but why?? Shouldn't they shoot up?)

Please explain.

Mike

 

[Gerard Bok]

For a flyback SMPS, if the output [with feedback] is loaded, the
switching duty cycle goes up.

In this situation, what would happen to voltages on other outputs ?

(They remain constant I guess, but why?? Shouldn't they shoot up?)

Why guess that they would remain the same if you think they shoot
up?
Why would the other output go up as well ?
If it did, by how much ?

Please explain.

Sounds like homework.
We've done ours

Hint: you may be looking at more than one phenomenon at the same
time.

 

[Charles Schuler]

For a flyback SMPS, if the output [with feedback] is loaded, the
switching duty cycle goes up.

In this situation, what would happen to voltages on other outputs ?

(They remain constant I guess, but why?? Shouldn't they shoot up?)

They will go up, unless the other outputs also contribute to the feedback
loop.

 

[Bob Myers]

For a flyback SMPS, if the output [with feedback] is loaded, the
switching duty cycle goes up.

In this situation, what would happen to voltages on other outputs ?

(They remain constant I guess, but why?? Shouldn't they shoot up?)

They will go up, unless the other outputs also contribute to the feedback
loop.

Or unless the other outputs have some sort of secondary-side
regulation (i.e., the addition of a linear regulator - not uncommon
in switch-mode power supplies for the more lightly-loaded
and otherwise unregulated/unmonitored outputs.

Bob M.