Extending LNK305 Buck input voltage - cascoded config
Posted by: MCsongor
on
Hi,
the LNK305s input voltage can be extended by adding an external MOSFET in a cascode configuration, this is true in a Flyback.
Is it possible to extend the input voltage range of the LNK305 with a similar solution in the buck topology?
Thanks and regards,
Csongor
Hi MCsongor,
Yes, it is possible.
You may look at DER-719Q (60Vdc-900Vdc input, 2.7 W output StackFET buck) as a reference.
It uses LinkSwitch-TN2 which has similar operation to LinkSwitch-TN but with added features such as BP/M pin shutdown function, Ilimit selection, and soft-start.