Full Bridge SMPS controllers have no output overload protection ?

[treez]

Do you know why there are no Full Bridge SMPS controllers on the planet earth which have on-chip output overload protection and output short circuit protection?

We wish to do an offline 500W Full Bridge SMPS.

Vin=360VDC
Vout=48vdc
Pout = 500W

Eg the LM5030 has no protection features other than the standard source sense overcurrent limit
https://www.ti.com/lit/ds/symlink/lm5030.pdf

 

[smijesh]

Simple: on-chip output protection required galvanic isolation barrier from primary voltage to secondary voltage, This isolation device consume more space in the IC. So recommending opt- isolator outside the IC for feed back controls.

 

[treez]

Thanks but that cant be the reason, since there are a great many offline flyback controllers (eg topswitch), which have output overload protection. This is done via the feedback optocoupler. Why cant the full bridge control chips have this too?

 

[bowman1710]

Does the current sense on the control chip not cater for this is some sense (as per page 15 for the LM5030)